Conductivities and transport properties of Ca(Zr/Hf)0.9Sc0.1O2.95
Doped CaZrO3 proton conductors are promising materials for electrochemical hydrogen sensors, which have already been used in commercialized hydrogen sensors for aluminum melts. Hafnium and Zirconium possess similar properties but their influences on conductive properties of CaZrO3 proton conductors...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Huang, Wenlong [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2021transfer abstract |
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| Schlagwörter: |
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| Umfang: |
7 |
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| Übergeordnetes Werk: |
Enthalten in: Soil and water bioengineering: Practice and research needs for reconciling natural hazard control and ecological restoration - Rey, F. ELSEVIER, 2018, Amsterdam [u.a.] |
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| Übergeordnetes Werk: |
volume:47 ; year:2021 ; number:24 ; day:15 ; month:12 ; pages:34568-34574 ; extent:7 |
| Links: |
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| DOI / URN: |
10.1016/j.ceramint.2021.08.371 |
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ELV055693687 |
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| 245 | 1 | 0 | |a Conductivities and transport properties of Ca(Zr/Hf)0.9Sc0.1O2.95 |
| 264 | 1 | |c 2021transfer abstract | |
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| 520 | |a Doped CaZrO3 proton conductors are promising materials for electrochemical hydrogen sensors, which have already been used in commercialized hydrogen sensors for aluminum melts. Hafnium and Zirconium possess similar properties but their influences on conductive properties of CaZrO3 proton conductors have not been well investigated. In this study, CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were prepared by solid-state reaction, and their conductivities and transport properties were systematically investigated by defect equilibria model. Total conductivities of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 reached 4.70 × 10−5−1.69 × 10−3 S·cm−1 and 4.83 × 10−6−9.71 × 10−4 S·cm−1 under humid air and 400 °C−800 °C. Their total standard molar hydration enthalpies were estimated to −59.1 kJ/mol and −56.9 kJ/mol, respectively. Conductivities of grain interiors were higher than those of total conductivities, and activation energies of protons were lower than oxide vacancies and holes. Transport numbers showed protonic conduction of Ca(Zr/Hf)0.9Sc0.1O2.95 to always dominate under humid air at 400 °C−700 °C. Protonic transport numbers of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were estimated to 0.41 and 0.44 at 800 °C, respectively. Meanwhile, protonic transport number of grain interiors was higher than that of total sample. Therefore, grain interior could block the transfer of oxide vacancies and holes. In sum, these findings look promising for application on electrochemical hydrogen sensors. | ||
| 520 | |a Doped CaZrO3 proton conductors are promising materials for electrochemical hydrogen sensors, which have already been used in commercialized hydrogen sensors for aluminum melts. Hafnium and Zirconium possess similar properties but their influences on conductive properties of CaZrO3 proton conductors have not been well investigated. In this study, CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were prepared by solid-state reaction, and their conductivities and transport properties were systematically investigated by defect equilibria model. Total conductivities of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 reached 4.70 × 10−5−1.69 × 10−3 S·cm−1 and 4.83 × 10−6−9.71 × 10−4 S·cm−1 under humid air and 400 °C−800 °C. Their total standard molar hydration enthalpies were estimated to −59.1 kJ/mol and −56.9 kJ/mol, respectively. Conductivities of grain interiors were higher than those of total conductivities, and activation energies of protons were lower than oxide vacancies and holes. Transport numbers showed protonic conduction of Ca(Zr/Hf)0.9Sc0.1O2.95 to always dominate under humid air at 400 °C−700 °C. Protonic transport numbers of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were estimated to 0.41 and 0.44 at 800 °C, respectively. Meanwhile, protonic transport number of grain interiors was higher than that of total sample. Therefore, grain interior could block the transfer of oxide vacancies and holes. In sum, these findings look promising for application on electrochemical hydrogen sensors. | ||
| 650 | 7 | |a Perovskite |2 Elsevier | |
| 650 | 7 | |a Transport properties |2 Elsevier | |
| 650 | 7 | |a Proton conductor |2 Elsevier | |
| 650 | 7 | |a Conductivity |2 Elsevier | |
| 700 | 1 | |a Li, Ying |4 oth | |
| 700 | 1 | |a Lu, Haiqiang |4 oth | |
| 700 | 1 | |a Ding, Yushi |4 oth | |
| 700 | 1 | |a Liu, Yandong |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |n Elsevier Science |a Rey, F. ELSEVIER |t Soil and water bioengineering: Practice and research needs for reconciling natural hazard control and ecological restoration |d 2018 |g Amsterdam [u.a.] |w (DE-627)ELV000899798 |
| 773 | 1 | 8 | |g volume:47 |g year:2021 |g number:24 |g day:15 |g month:12 |g pages:34568-34574 |g extent:7 |
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10.1016/j.ceramint.2021.08.371 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001563.pica (DE-627)ELV055693687 (ELSEVIER)S0272-8842(21)02774-7 DE-627 ger DE-627 rakwb eng 333.7 610 VZ 43.12 bkl 43.13 bkl 44.13 bkl Huang, Wenlong verfasserin aut Conductivities and transport properties of Ca(Zr/Hf)0.9Sc0.1O2.95 2021transfer abstract 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Doped CaZrO3 proton conductors are promising materials for electrochemical hydrogen sensors, which have already been used in commercialized hydrogen sensors for aluminum melts. Hafnium and Zirconium possess similar properties but their influences on conductive properties of CaZrO3 proton conductors have not been well investigated. In this study, CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were prepared by solid-state reaction, and their conductivities and transport properties were systematically investigated by defect equilibria model. Total conductivities of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 reached 4.70 × 10−5−1.69 × 10−3 S·cm−1 and 4.83 × 10−6−9.71 × 10−4 S·cm−1 under humid air and 400 °C−800 °C. Their total standard molar hydration enthalpies were estimated to −59.1 kJ/mol and −56.9 kJ/mol, respectively. Conductivities of grain interiors were higher than those of total conductivities, and activation energies of protons were lower than oxide vacancies and holes. Transport numbers showed protonic conduction of Ca(Zr/Hf)0.9Sc0.1O2.95 to always dominate under humid air at 400 °C−700 °C. Protonic transport numbers of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were estimated to 0.41 and 0.44 at 800 °C, respectively. Meanwhile, protonic transport number of grain interiors was higher than that of total sample. Therefore, grain interior could block the transfer of oxide vacancies and holes. In sum, these findings look promising for application on electrochemical hydrogen sensors. Doped CaZrO3 proton conductors are promising materials for electrochemical hydrogen sensors, which have already been used in commercialized hydrogen sensors for aluminum melts. Hafnium and Zirconium possess similar properties but their influences on conductive properties of CaZrO3 proton conductors have not been well investigated. In this study, CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were prepared by solid-state reaction, and their conductivities and transport properties were systematically investigated by defect equilibria model. Total conductivities of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 reached 4.70 × 10−5−1.69 × 10−3 S·cm−1 and 4.83 × 10−6−9.71 × 10−4 S·cm−1 under humid air and 400 °C−800 °C. Their total standard molar hydration enthalpies were estimated to −59.1 kJ/mol and −56.9 kJ/mol, respectively. Conductivities of grain interiors were higher than those of total conductivities, and activation energies of protons were lower than oxide vacancies and holes. Transport numbers showed protonic conduction of Ca(Zr/Hf)0.9Sc0.1O2.95 to always dominate under humid air at 400 °C−700 °C. Protonic transport numbers of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were estimated to 0.41 and 0.44 at 800 °C, respectively. Meanwhile, protonic transport number of grain interiors was higher than that of total sample. Therefore, grain interior could block the transfer of oxide vacancies and holes. In sum, these findings look promising for application on electrochemical hydrogen sensors. Perovskite Elsevier Transport properties Elsevier Proton conductor Elsevier Conductivity Elsevier Li, Ying oth Lu, Haiqiang oth Ding, Yushi oth Liu, Yandong oth Enthalten in Elsevier Science Rey, F. ELSEVIER Soil and water bioengineering: Practice and research needs for reconciling natural hazard control and ecological restoration 2018 Amsterdam [u.a.] (DE-627)ELV000899798 volume:47 year:2021 number:24 day:15 month:12 pages:34568-34574 extent:7 https://doi.org/10.1016/j.ceramint.2021.08.371 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA SSG-OPC-GGO 43.12 Umweltchemie VZ 43.13 Umwelttoxikologie VZ 44.13 Medizinische Ökologie VZ AR 47 2021 24 15 1215 34568-34574 7 |
| spelling |
10.1016/j.ceramint.2021.08.371 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001563.pica (DE-627)ELV055693687 (ELSEVIER)S0272-8842(21)02774-7 DE-627 ger DE-627 rakwb eng 333.7 610 VZ 43.12 bkl 43.13 bkl 44.13 bkl Huang, Wenlong verfasserin aut Conductivities and transport properties of Ca(Zr/Hf)0.9Sc0.1O2.95 2021transfer abstract 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Doped CaZrO3 proton conductors are promising materials for electrochemical hydrogen sensors, which have already been used in commercialized hydrogen sensors for aluminum melts. Hafnium and Zirconium possess similar properties but their influences on conductive properties of CaZrO3 proton conductors have not been well investigated. In this study, CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were prepared by solid-state reaction, and their conductivities and transport properties were systematically investigated by defect equilibria model. Total conductivities of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 reached 4.70 × 10−5−1.69 × 10−3 S·cm−1 and 4.83 × 10−6−9.71 × 10−4 S·cm−1 under humid air and 400 °C−800 °C. Their total standard molar hydration enthalpies were estimated to −59.1 kJ/mol and −56.9 kJ/mol, respectively. Conductivities of grain interiors were higher than those of total conductivities, and activation energies of protons were lower than oxide vacancies and holes. Transport numbers showed protonic conduction of Ca(Zr/Hf)0.9Sc0.1O2.95 to always dominate under humid air at 400 °C−700 °C. Protonic transport numbers of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were estimated to 0.41 and 0.44 at 800 °C, respectively. Meanwhile, protonic transport number of grain interiors was higher than that of total sample. Therefore, grain interior could block the transfer of oxide vacancies and holes. In sum, these findings look promising for application on electrochemical hydrogen sensors. Doped CaZrO3 proton conductors are promising materials for electrochemical hydrogen sensors, which have already been used in commercialized hydrogen sensors for aluminum melts. Hafnium and Zirconium possess similar properties but their influences on conductive properties of CaZrO3 proton conductors have not been well investigated. In this study, CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were prepared by solid-state reaction, and their conductivities and transport properties were systematically investigated by defect equilibria model. Total conductivities of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 reached 4.70 × 10−5−1.69 × 10−3 S·cm−1 and 4.83 × 10−6−9.71 × 10−4 S·cm−1 under humid air and 400 °C−800 °C. Their total standard molar hydration enthalpies were estimated to −59.1 kJ/mol and −56.9 kJ/mol, respectively. Conductivities of grain interiors were higher than those of total conductivities, and activation energies of protons were lower than oxide vacancies and holes. Transport numbers showed protonic conduction of Ca(Zr/Hf)0.9Sc0.1O2.95 to always dominate under humid air at 400 °C−700 °C. Protonic transport numbers of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were estimated to 0.41 and 0.44 at 800 °C, respectively. Meanwhile, protonic transport number of grain interiors was higher than that of total sample. Therefore, grain interior could block the transfer of oxide vacancies and holes. In sum, these findings look promising for application on electrochemical hydrogen sensors. Perovskite Elsevier Transport properties Elsevier Proton conductor Elsevier Conductivity Elsevier Li, Ying oth Lu, Haiqiang oth Ding, Yushi oth Liu, Yandong oth Enthalten in Elsevier Science Rey, F. ELSEVIER Soil and water bioengineering: Practice and research needs for reconciling natural hazard control and ecological restoration 2018 Amsterdam [u.a.] (DE-627)ELV000899798 volume:47 year:2021 number:24 day:15 month:12 pages:34568-34574 extent:7 https://doi.org/10.1016/j.ceramint.2021.08.371 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA SSG-OPC-GGO 43.12 Umweltchemie VZ 43.13 Umwelttoxikologie VZ 44.13 Medizinische Ökologie VZ AR 47 2021 24 15 1215 34568-34574 7 |
| allfields_unstemmed |
10.1016/j.ceramint.2021.08.371 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001563.pica (DE-627)ELV055693687 (ELSEVIER)S0272-8842(21)02774-7 DE-627 ger DE-627 rakwb eng 333.7 610 VZ 43.12 bkl 43.13 bkl 44.13 bkl Huang, Wenlong verfasserin aut Conductivities and transport properties of Ca(Zr/Hf)0.9Sc0.1O2.95 2021transfer abstract 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Doped CaZrO3 proton conductors are promising materials for electrochemical hydrogen sensors, which have already been used in commercialized hydrogen sensors for aluminum melts. Hafnium and Zirconium possess similar properties but their influences on conductive properties of CaZrO3 proton conductors have not been well investigated. In this study, CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were prepared by solid-state reaction, and their conductivities and transport properties were systematically investigated by defect equilibria model. Total conductivities of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 reached 4.70 × 10−5−1.69 × 10−3 S·cm−1 and 4.83 × 10−6−9.71 × 10−4 S·cm−1 under humid air and 400 °C−800 °C. Their total standard molar hydration enthalpies were estimated to −59.1 kJ/mol and −56.9 kJ/mol, respectively. Conductivities of grain interiors were higher than those of total conductivities, and activation energies of protons were lower than oxide vacancies and holes. Transport numbers showed protonic conduction of Ca(Zr/Hf)0.9Sc0.1O2.95 to always dominate under humid air at 400 °C−700 °C. Protonic transport numbers of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were estimated to 0.41 and 0.44 at 800 °C, respectively. Meanwhile, protonic transport number of grain interiors was higher than that of total sample. Therefore, grain interior could block the transfer of oxide vacancies and holes. In sum, these findings look promising for application on electrochemical hydrogen sensors. Doped CaZrO3 proton conductors are promising materials for electrochemical hydrogen sensors, which have already been used in commercialized hydrogen sensors for aluminum melts. Hafnium and Zirconium possess similar properties but their influences on conductive properties of CaZrO3 proton conductors have not been well investigated. In this study, CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were prepared by solid-state reaction, and their conductivities and transport properties were systematically investigated by defect equilibria model. Total conductivities of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 reached 4.70 × 10−5−1.69 × 10−3 S·cm−1 and 4.83 × 10−6−9.71 × 10−4 S·cm−1 under humid air and 400 °C−800 °C. Their total standard molar hydration enthalpies were estimated to −59.1 kJ/mol and −56.9 kJ/mol, respectively. Conductivities of grain interiors were higher than those of total conductivities, and activation energies of protons were lower than oxide vacancies and holes. Transport numbers showed protonic conduction of Ca(Zr/Hf)0.9Sc0.1O2.95 to always dominate under humid air at 400 °C−700 °C. Protonic transport numbers of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were estimated to 0.41 and 0.44 at 800 °C, respectively. Meanwhile, protonic transport number of grain interiors was higher than that of total sample. Therefore, grain interior could block the transfer of oxide vacancies and holes. In sum, these findings look promising for application on electrochemical hydrogen sensors. Perovskite Elsevier Transport properties Elsevier Proton conductor Elsevier Conductivity Elsevier Li, Ying oth Lu, Haiqiang oth Ding, Yushi oth Liu, Yandong oth Enthalten in Elsevier Science Rey, F. ELSEVIER Soil and water bioengineering: Practice and research needs for reconciling natural hazard control and ecological restoration 2018 Amsterdam [u.a.] (DE-627)ELV000899798 volume:47 year:2021 number:24 day:15 month:12 pages:34568-34574 extent:7 https://doi.org/10.1016/j.ceramint.2021.08.371 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA SSG-OPC-GGO 43.12 Umweltchemie VZ 43.13 Umwelttoxikologie VZ 44.13 Medizinische Ökologie VZ AR 47 2021 24 15 1215 34568-34574 7 |
| allfieldsGer |
10.1016/j.ceramint.2021.08.371 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001563.pica (DE-627)ELV055693687 (ELSEVIER)S0272-8842(21)02774-7 DE-627 ger DE-627 rakwb eng 333.7 610 VZ 43.12 bkl 43.13 bkl 44.13 bkl Huang, Wenlong verfasserin aut Conductivities and transport properties of Ca(Zr/Hf)0.9Sc0.1O2.95 2021transfer abstract 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Doped CaZrO3 proton conductors are promising materials for electrochemical hydrogen sensors, which have already been used in commercialized hydrogen sensors for aluminum melts. Hafnium and Zirconium possess similar properties but their influences on conductive properties of CaZrO3 proton conductors have not been well investigated. In this study, CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were prepared by solid-state reaction, and their conductivities and transport properties were systematically investigated by defect equilibria model. Total conductivities of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 reached 4.70 × 10−5−1.69 × 10−3 S·cm−1 and 4.83 × 10−6−9.71 × 10−4 S·cm−1 under humid air and 400 °C−800 °C. Their total standard molar hydration enthalpies were estimated to −59.1 kJ/mol and −56.9 kJ/mol, respectively. Conductivities of grain interiors were higher than those of total conductivities, and activation energies of protons were lower than oxide vacancies and holes. Transport numbers showed protonic conduction of Ca(Zr/Hf)0.9Sc0.1O2.95 to always dominate under humid air at 400 °C−700 °C. Protonic transport numbers of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were estimated to 0.41 and 0.44 at 800 °C, respectively. Meanwhile, protonic transport number of grain interiors was higher than that of total sample. Therefore, grain interior could block the transfer of oxide vacancies and holes. In sum, these findings look promising for application on electrochemical hydrogen sensors. Doped CaZrO3 proton conductors are promising materials for electrochemical hydrogen sensors, which have already been used in commercialized hydrogen sensors for aluminum melts. Hafnium and Zirconium possess similar properties but their influences on conductive properties of CaZrO3 proton conductors have not been well investigated. In this study, CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were prepared by solid-state reaction, and their conductivities and transport properties were systematically investigated by defect equilibria model. Total conductivities of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 reached 4.70 × 10−5−1.69 × 10−3 S·cm−1 and 4.83 × 10−6−9.71 × 10−4 S·cm−1 under humid air and 400 °C−800 °C. Their total standard molar hydration enthalpies were estimated to −59.1 kJ/mol and −56.9 kJ/mol, respectively. Conductivities of grain interiors were higher than those of total conductivities, and activation energies of protons were lower than oxide vacancies and holes. Transport numbers showed protonic conduction of Ca(Zr/Hf)0.9Sc0.1O2.95 to always dominate under humid air at 400 °C−700 °C. Protonic transport numbers of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were estimated to 0.41 and 0.44 at 800 °C, respectively. Meanwhile, protonic transport number of grain interiors was higher than that of total sample. Therefore, grain interior could block the transfer of oxide vacancies and holes. In sum, these findings look promising for application on electrochemical hydrogen sensors. Perovskite Elsevier Transport properties Elsevier Proton conductor Elsevier Conductivity Elsevier Li, Ying oth Lu, Haiqiang oth Ding, Yushi oth Liu, Yandong oth Enthalten in Elsevier Science Rey, F. ELSEVIER Soil and water bioengineering: Practice and research needs for reconciling natural hazard control and ecological restoration 2018 Amsterdam [u.a.] (DE-627)ELV000899798 volume:47 year:2021 number:24 day:15 month:12 pages:34568-34574 extent:7 https://doi.org/10.1016/j.ceramint.2021.08.371 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA SSG-OPC-GGO 43.12 Umweltchemie VZ 43.13 Umwelttoxikologie VZ 44.13 Medizinische Ökologie VZ AR 47 2021 24 15 1215 34568-34574 7 |
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10.1016/j.ceramint.2021.08.371 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001563.pica (DE-627)ELV055693687 (ELSEVIER)S0272-8842(21)02774-7 DE-627 ger DE-627 rakwb eng 333.7 610 VZ 43.12 bkl 43.13 bkl 44.13 bkl Huang, Wenlong verfasserin aut Conductivities and transport properties of Ca(Zr/Hf)0.9Sc0.1O2.95 2021transfer abstract 7 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Doped CaZrO3 proton conductors are promising materials for electrochemical hydrogen sensors, which have already been used in commercialized hydrogen sensors for aluminum melts. Hafnium and Zirconium possess similar properties but their influences on conductive properties of CaZrO3 proton conductors have not been well investigated. In this study, CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were prepared by solid-state reaction, and their conductivities and transport properties were systematically investigated by defect equilibria model. Total conductivities of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 reached 4.70 × 10−5−1.69 × 10−3 S·cm−1 and 4.83 × 10−6−9.71 × 10−4 S·cm−1 under humid air and 400 °C−800 °C. Their total standard molar hydration enthalpies were estimated to −59.1 kJ/mol and −56.9 kJ/mol, respectively. Conductivities of grain interiors were higher than those of total conductivities, and activation energies of protons were lower than oxide vacancies and holes. Transport numbers showed protonic conduction of Ca(Zr/Hf)0.9Sc0.1O2.95 to always dominate under humid air at 400 °C−700 °C. Protonic transport numbers of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were estimated to 0.41 and 0.44 at 800 °C, respectively. Meanwhile, protonic transport number of grain interiors was higher than that of total sample. Therefore, grain interior could block the transfer of oxide vacancies and holes. In sum, these findings look promising for application on electrochemical hydrogen sensors. Doped CaZrO3 proton conductors are promising materials for electrochemical hydrogen sensors, which have already been used in commercialized hydrogen sensors for aluminum melts. Hafnium and Zirconium possess similar properties but their influences on conductive properties of CaZrO3 proton conductors have not been well investigated. In this study, CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were prepared by solid-state reaction, and their conductivities and transport properties were systematically investigated by defect equilibria model. Total conductivities of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 reached 4.70 × 10−5−1.69 × 10−3 S·cm−1 and 4.83 × 10−6−9.71 × 10−4 S·cm−1 under humid air and 400 °C−800 °C. Their total standard molar hydration enthalpies were estimated to −59.1 kJ/mol and −56.9 kJ/mol, respectively. Conductivities of grain interiors were higher than those of total conductivities, and activation energies of protons were lower than oxide vacancies and holes. Transport numbers showed protonic conduction of Ca(Zr/Hf)0.9Sc0.1O2.95 to always dominate under humid air at 400 °C−700 °C. Protonic transport numbers of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were estimated to 0.41 and 0.44 at 800 °C, respectively. Meanwhile, protonic transport number of grain interiors was higher than that of total sample. Therefore, grain interior could block the transfer of oxide vacancies and holes. In sum, these findings look promising for application on electrochemical hydrogen sensors. Perovskite Elsevier Transport properties Elsevier Proton conductor Elsevier Conductivity Elsevier Li, Ying oth Lu, Haiqiang oth Ding, Yushi oth Liu, Yandong oth Enthalten in Elsevier Science Rey, F. ELSEVIER Soil and water bioengineering: Practice and research needs for reconciling natural hazard control and ecological restoration 2018 Amsterdam [u.a.] (DE-627)ELV000899798 volume:47 year:2021 number:24 day:15 month:12 pages:34568-34574 extent:7 https://doi.org/10.1016/j.ceramint.2021.08.371 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA SSG-OPC-GGO 43.12 Umweltchemie VZ 43.13 Umwelttoxikologie VZ 44.13 Medizinische Ökologie VZ AR 47 2021 24 15 1215 34568-34574 7 |
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In this study, CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were prepared by solid-state reaction, and their conductivities and transport properties were systematically investigated by defect equilibria model. Total conductivities of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 reached 4.70 × 10−5−1.69 × 10−3 S·cm−1 and 4.83 × 10−6−9.71 × 10−4 S·cm−1 under humid air and 400 °C−800 °C. Their total standard molar hydration enthalpies were estimated to −59.1 kJ/mol and −56.9 kJ/mol, respectively. Conductivities of grain interiors were higher than those of total conductivities, and activation energies of protons were lower than oxide vacancies and holes. Transport numbers showed protonic conduction of Ca(Zr/Hf)0.9Sc0.1O2.95 to always dominate under humid air at 400 °C−700 °C. Protonic transport numbers of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were estimated to 0.41 and 0.44 at 800 °C, respectively. Meanwhile, protonic transport number of grain interiors was higher than that of total sample. 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Conductivities and transport properties of Ca(Zr/Hf)0.9Sc0.1O2.95 |
| abstract |
Doped CaZrO3 proton conductors are promising materials for electrochemical hydrogen sensors, which have already been used in commercialized hydrogen sensors for aluminum melts. Hafnium and Zirconium possess similar properties but their influences on conductive properties of CaZrO3 proton conductors have not been well investigated. In this study, CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were prepared by solid-state reaction, and their conductivities and transport properties were systematically investigated by defect equilibria model. Total conductivities of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 reached 4.70 × 10−5−1.69 × 10−3 S·cm−1 and 4.83 × 10−6−9.71 × 10−4 S·cm−1 under humid air and 400 °C−800 °C. Their total standard molar hydration enthalpies were estimated to −59.1 kJ/mol and −56.9 kJ/mol, respectively. Conductivities of grain interiors were higher than those of total conductivities, and activation energies of protons were lower than oxide vacancies and holes. Transport numbers showed protonic conduction of Ca(Zr/Hf)0.9Sc0.1O2.95 to always dominate under humid air at 400 °C−700 °C. Protonic transport numbers of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were estimated to 0.41 and 0.44 at 800 °C, respectively. Meanwhile, protonic transport number of grain interiors was higher than that of total sample. Therefore, grain interior could block the transfer of oxide vacancies and holes. In sum, these findings look promising for application on electrochemical hydrogen sensors. |
| abstractGer |
Doped CaZrO3 proton conductors are promising materials for electrochemical hydrogen sensors, which have already been used in commercialized hydrogen sensors for aluminum melts. Hafnium and Zirconium possess similar properties but their influences on conductive properties of CaZrO3 proton conductors have not been well investigated. In this study, CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were prepared by solid-state reaction, and their conductivities and transport properties were systematically investigated by defect equilibria model. Total conductivities of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 reached 4.70 × 10−5−1.69 × 10−3 S·cm−1 and 4.83 × 10−6−9.71 × 10−4 S·cm−1 under humid air and 400 °C−800 °C. Their total standard molar hydration enthalpies were estimated to −59.1 kJ/mol and −56.9 kJ/mol, respectively. Conductivities of grain interiors were higher than those of total conductivities, and activation energies of protons were lower than oxide vacancies and holes. Transport numbers showed protonic conduction of Ca(Zr/Hf)0.9Sc0.1O2.95 to always dominate under humid air at 400 °C−700 °C. Protonic transport numbers of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were estimated to 0.41 and 0.44 at 800 °C, respectively. Meanwhile, protonic transport number of grain interiors was higher than that of total sample. Therefore, grain interior could block the transfer of oxide vacancies and holes. In sum, these findings look promising for application on electrochemical hydrogen sensors. |
| abstract_unstemmed |
Doped CaZrO3 proton conductors are promising materials for electrochemical hydrogen sensors, which have already been used in commercialized hydrogen sensors for aluminum melts. Hafnium and Zirconium possess similar properties but their influences on conductive properties of CaZrO3 proton conductors have not been well investigated. In this study, CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were prepared by solid-state reaction, and their conductivities and transport properties were systematically investigated by defect equilibria model. Total conductivities of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 reached 4.70 × 10−5−1.69 × 10−3 S·cm−1 and 4.83 × 10−6−9.71 × 10−4 S·cm−1 under humid air and 400 °C−800 °C. Their total standard molar hydration enthalpies were estimated to −59.1 kJ/mol and −56.9 kJ/mol, respectively. Conductivities of grain interiors were higher than those of total conductivities, and activation energies of protons were lower than oxide vacancies and holes. Transport numbers showed protonic conduction of Ca(Zr/Hf)0.9Sc0.1O2.95 to always dominate under humid air at 400 °C−700 °C. Protonic transport numbers of CaZr0.9Sc0.1O2.95 and CaHf0.9Sc0.1O2.95 were estimated to 0.41 and 0.44 at 800 °C, respectively. Meanwhile, protonic transport number of grain interiors was higher than that of total sample. Therefore, grain interior could block the transfer of oxide vacancies and holes. In sum, these findings look promising for application on electrochemical hydrogen sensors. |
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| title_short |
Conductivities and transport properties of Ca(Zr/Hf)0.9Sc0.1O2.95 |
| url |
https://doi.org/10.1016/j.ceramint.2021.08.371 |
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| author2 |
Li, Ying Lu, Haiqiang Ding, Yushi Liu, Yandong |
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Li, Ying Lu, Haiqiang Ding, Yushi Liu, Yandong |
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10.1016/j.ceramint.2021.08.371 |
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2024-07-06T18:15:52.571Z |
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