Influences of $ NH_{4} $F additive and calcination time on the morphological evolution of α-$ Al_{2} $$ O_{3} $ from a milled γ-$ Al_{2} $$ O_{3} $ precursor
Abstract The influences of an $ NH_{4} $F additive content and calcination time on the morphological evolution of α-$ Al_{2} $$ O_{3} $ were investigated by using commercial γ-$ Al_{2} $$ O_{3} $ precursor as raw material. The results showed that the morphological evolution of α-$ Al_{2} $$ O_{3} $...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Zhu, Lingling [verfasserIn] |
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Artikel |
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| Erschienen: |
2017 |
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©2017 Walter de Gruyter GmbH, Berlin/Boston |
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| Übergeordnetes Werk: |
Enthalten in: Zeitschrift für Naturforschung. B, Chemical sciences - De Gruyter, 1947, 72(2017), 9 vom: 01. Sept., Seite 665-670 |
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| Übergeordnetes Werk: |
volume:72 ; year:2017 ; number:9 ; day:01 ; month:09 ; pages:665-670 |
| Links: |
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| DOI / URN: |
10.1515/znb-2017-0079 |
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| Katalog-ID: |
OLC2141289912 |
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| 245 | 1 | 0 | |a Influences of $ NH_{4} $F additive and calcination time on the morphological evolution of α-$ Al_{2} $$ O_{3} $ from a milled γ-$ Al_{2} $$ O_{3} $ precursor |
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| 520 | |a Abstract The influences of an $ NH_{4} $F additive content and calcination time on the morphological evolution of α-$ Al_{2} $$ O_{3} $ were investigated by using commercial γ-$ Al_{2} $$ O_{3} $ precursor as raw material. The results showed that the morphological evolution of α-$ Al_{2} $$ O_{3} $ was highly related to the addition of $ NH_{4} $F, the additive content, and the calcination time. Square-like α-$ Al_{2} $$ O_{3} $ powders with a primary crystal size of ~200 nm were formed from the milled γ-$ Al_{2} $$ O_{3} $ precursor with 1 wt.% $ NH_{4} $F at 1300°C for 2 h, whereas round cake-like, hexagonal platelets, slender-like, and other irregularly shaped α-$ Al_{2} $$ O_{3} $ pieces in the size range of 0.2–2 μm were synthesized from the milled γ-$ Al_{2} $$ O_{3} $ precursor with 20 wt.% $ NH_{4} $F addition under the same calcination. Both morphological regularity and particle size distribution of α-$ Al_{2} $$ O_{3} $ were greatly facilitated by increasing the calcination time from 2 to 5 h. The addition of $ NH_{4} $F may lead to an alteration of the α-$ Al_{2} $$ O_{3} $ growth process by a change in the scale of the developing microstructure. | ||
| 700 | 1 | |a Sun, Chunhui |4 aut | |
| 700 | 1 | |a Chen, Liugang |4 aut | |
| 700 | 1 | |a Lu, Xifeng |4 aut | |
| 700 | 1 | |a Li, Sai |4 aut | |
| 700 | 1 | |a Ye, Guotian |4 aut | |
| 700 | 1 | |a Liu, Luoqiang |4 aut | |
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10.1515/znb-2017-0079 doi (DE-627)OLC2141289912 (DE-B1597)znb-2017-0079-p DE-627 ger DE-627 rakwb 540 VZ 540 VZ VA 8360 VZ rvk Zhu, Lingling verfasserin aut Influences of $ NH_{4} $F additive and calcination time on the morphological evolution of α-$ Al_{2} $$ O_{3} $ from a milled γ-$ Al_{2} $$ O_{3} $ precursor 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier ©2017 Walter de Gruyter GmbH, Berlin/Boston Abstract The influences of an $ NH_{4} $F additive content and calcination time on the morphological evolution of α-$ Al_{2} $$ O_{3} $ were investigated by using commercial γ-$ Al_{2} $$ O_{3} $ precursor as raw material. The results showed that the morphological evolution of α-$ Al_{2} $$ O_{3} $ was highly related to the addition of $ NH_{4} $F, the additive content, and the calcination time. Square-like α-$ Al_{2} $$ O_{3} $ powders with a primary crystal size of ~200 nm were formed from the milled γ-$ Al_{2} $$ O_{3} $ precursor with 1 wt.% $ NH_{4} $F at 1300°C for 2 h, whereas round cake-like, hexagonal platelets, slender-like, and other irregularly shaped α-$ Al_{2} $$ O_{3} $ pieces in the size range of 0.2–2 μm were synthesized from the milled γ-$ Al_{2} $$ O_{3} $ precursor with 20 wt.% $ NH_{4} $F addition under the same calcination. Both morphological regularity and particle size distribution of α-$ Al_{2} $$ O_{3} $ were greatly facilitated by increasing the calcination time from 2 to 5 h. The addition of $ NH_{4} $F may lead to an alteration of the α-$ Al_{2} $$ O_{3} $ growth process by a change in the scale of the developing microstructure. Sun, Chunhui aut Chen, Liugang aut Lu, Xifeng aut Li, Sai aut Ye, Guotian aut Liu, Luoqiang aut Enthalten in Zeitschrift für Naturforschung. B, Chemical sciences De Gruyter, 1947 72(2017), 9 vom: 01. Sept., Seite 665-670 (DE-627)129307386 (DE-600)124635-5 (DE-576)014504928 0932-0776 nnns volume:72 year:2017 number:9 day:01 month:09 pages:665-670 https://doi.org/10.1515/znb-2017-0079 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-CHE SSG-OLC-FOR SSG-OPC-FOR GBV_ILN_24 GBV_ILN_59 GBV_ILN_70 GBV_ILN_121 GBV_ILN_267 GBV_ILN_2010 GBV_ILN_2015 GBV_ILN_2021 GBV_ILN_4012 GBV_ILN_4125 GBV_ILN_4277 GBV_ILN_4302 GBV_ILN_4320 VA 8360 AR 72 2017 9 01 09 665-670 |
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10.1515/znb-2017-0079 doi (DE-627)OLC2141289912 (DE-B1597)znb-2017-0079-p DE-627 ger DE-627 rakwb 540 VZ 540 VZ VA 8360 VZ rvk Zhu, Lingling verfasserin aut Influences of $ NH_{4} $F additive and calcination time on the morphological evolution of α-$ Al_{2} $$ O_{3} $ from a milled γ-$ Al_{2} $$ O_{3} $ precursor 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier ©2017 Walter de Gruyter GmbH, Berlin/Boston Abstract The influences of an $ NH_{4} $F additive content and calcination time on the morphological evolution of α-$ Al_{2} $$ O_{3} $ were investigated by using commercial γ-$ Al_{2} $$ O_{3} $ precursor as raw material. The results showed that the morphological evolution of α-$ Al_{2} $$ O_{3} $ was highly related to the addition of $ NH_{4} $F, the additive content, and the calcination time. Square-like α-$ Al_{2} $$ O_{3} $ powders with a primary crystal size of ~200 nm were formed from the milled γ-$ Al_{2} $$ O_{3} $ precursor with 1 wt.% $ NH_{4} $F at 1300°C for 2 h, whereas round cake-like, hexagonal platelets, slender-like, and other irregularly shaped α-$ Al_{2} $$ O_{3} $ pieces in the size range of 0.2–2 μm were synthesized from the milled γ-$ Al_{2} $$ O_{3} $ precursor with 20 wt.% $ NH_{4} $F addition under the same calcination. Both morphological regularity and particle size distribution of α-$ Al_{2} $$ O_{3} $ were greatly facilitated by increasing the calcination time from 2 to 5 h. The addition of $ NH_{4} $F may lead to an alteration of the α-$ Al_{2} $$ O_{3} $ growth process by a change in the scale of the developing microstructure. Sun, Chunhui aut Chen, Liugang aut Lu, Xifeng aut Li, Sai aut Ye, Guotian aut Liu, Luoqiang aut Enthalten in Zeitschrift für Naturforschung. B, Chemical sciences De Gruyter, 1947 72(2017), 9 vom: 01. Sept., Seite 665-670 (DE-627)129307386 (DE-600)124635-5 (DE-576)014504928 0932-0776 nnns volume:72 year:2017 number:9 day:01 month:09 pages:665-670 https://doi.org/10.1515/znb-2017-0079 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-CHE SSG-OLC-FOR SSG-OPC-FOR GBV_ILN_24 GBV_ILN_59 GBV_ILN_70 GBV_ILN_121 GBV_ILN_267 GBV_ILN_2010 GBV_ILN_2015 GBV_ILN_2021 GBV_ILN_4012 GBV_ILN_4125 GBV_ILN_4277 GBV_ILN_4302 GBV_ILN_4320 VA 8360 AR 72 2017 9 01 09 665-670 |
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10.1515/znb-2017-0079 doi (DE-627)OLC2141289912 (DE-B1597)znb-2017-0079-p DE-627 ger DE-627 rakwb 540 VZ 540 VZ VA 8360 VZ rvk Zhu, Lingling verfasserin aut Influences of $ NH_{4} $F additive and calcination time on the morphological evolution of α-$ Al_{2} $$ O_{3} $ from a milled γ-$ Al_{2} $$ O_{3} $ precursor 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier ©2017 Walter de Gruyter GmbH, Berlin/Boston Abstract The influences of an $ NH_{4} $F additive content and calcination time on the morphological evolution of α-$ Al_{2} $$ O_{3} $ were investigated by using commercial γ-$ Al_{2} $$ O_{3} $ precursor as raw material. The results showed that the morphological evolution of α-$ Al_{2} $$ O_{3} $ was highly related to the addition of $ NH_{4} $F, the additive content, and the calcination time. Square-like α-$ Al_{2} $$ O_{3} $ powders with a primary crystal size of ~200 nm were formed from the milled γ-$ Al_{2} $$ O_{3} $ precursor with 1 wt.% $ NH_{4} $F at 1300°C for 2 h, whereas round cake-like, hexagonal platelets, slender-like, and other irregularly shaped α-$ Al_{2} $$ O_{3} $ pieces in the size range of 0.2–2 μm were synthesized from the milled γ-$ Al_{2} $$ O_{3} $ precursor with 20 wt.% $ NH_{4} $F addition under the same calcination. Both morphological regularity and particle size distribution of α-$ Al_{2} $$ O_{3} $ were greatly facilitated by increasing the calcination time from 2 to 5 h. The addition of $ NH_{4} $F may lead to an alteration of the α-$ Al_{2} $$ O_{3} $ growth process by a change in the scale of the developing microstructure. Sun, Chunhui aut Chen, Liugang aut Lu, Xifeng aut Li, Sai aut Ye, Guotian aut Liu, Luoqiang aut Enthalten in Zeitschrift für Naturforschung. B, Chemical sciences De Gruyter, 1947 72(2017), 9 vom: 01. Sept., Seite 665-670 (DE-627)129307386 (DE-600)124635-5 (DE-576)014504928 0932-0776 nnns volume:72 year:2017 number:9 day:01 month:09 pages:665-670 https://doi.org/10.1515/znb-2017-0079 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-CHE SSG-OLC-FOR SSG-OPC-FOR GBV_ILN_24 GBV_ILN_59 GBV_ILN_70 GBV_ILN_121 GBV_ILN_267 GBV_ILN_2010 GBV_ILN_2015 GBV_ILN_2021 GBV_ILN_4012 GBV_ILN_4125 GBV_ILN_4277 GBV_ILN_4302 GBV_ILN_4320 VA 8360 AR 72 2017 9 01 09 665-670 |
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10.1515/znb-2017-0079 doi (DE-627)OLC2141289912 (DE-B1597)znb-2017-0079-p DE-627 ger DE-627 rakwb 540 VZ 540 VZ VA 8360 VZ rvk Zhu, Lingling verfasserin aut Influences of $ NH_{4} $F additive and calcination time on the morphological evolution of α-$ Al_{2} $$ O_{3} $ from a milled γ-$ Al_{2} $$ O_{3} $ precursor 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier ©2017 Walter de Gruyter GmbH, Berlin/Boston Abstract The influences of an $ NH_{4} $F additive content and calcination time on the morphological evolution of α-$ Al_{2} $$ O_{3} $ were investigated by using commercial γ-$ Al_{2} $$ O_{3} $ precursor as raw material. The results showed that the morphological evolution of α-$ Al_{2} $$ O_{3} $ was highly related to the addition of $ NH_{4} $F, the additive content, and the calcination time. Square-like α-$ Al_{2} $$ O_{3} $ powders with a primary crystal size of ~200 nm were formed from the milled γ-$ Al_{2} $$ O_{3} $ precursor with 1 wt.% $ NH_{4} $F at 1300°C for 2 h, whereas round cake-like, hexagonal platelets, slender-like, and other irregularly shaped α-$ Al_{2} $$ O_{3} $ pieces in the size range of 0.2–2 μm were synthesized from the milled γ-$ Al_{2} $$ O_{3} $ precursor with 20 wt.% $ NH_{4} $F addition under the same calcination. Both morphological regularity and particle size distribution of α-$ Al_{2} $$ O_{3} $ were greatly facilitated by increasing the calcination time from 2 to 5 h. The addition of $ NH_{4} $F may lead to an alteration of the α-$ Al_{2} $$ O_{3} $ growth process by a change in the scale of the developing microstructure. Sun, Chunhui aut Chen, Liugang aut Lu, Xifeng aut Li, Sai aut Ye, Guotian aut Liu, Luoqiang aut Enthalten in Zeitschrift für Naturforschung. B, Chemical sciences De Gruyter, 1947 72(2017), 9 vom: 01. Sept., Seite 665-670 (DE-627)129307386 (DE-600)124635-5 (DE-576)014504928 0932-0776 nnns volume:72 year:2017 number:9 day:01 month:09 pages:665-670 https://doi.org/10.1515/znb-2017-0079 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-CHE SSG-OLC-FOR SSG-OPC-FOR GBV_ILN_24 GBV_ILN_59 GBV_ILN_70 GBV_ILN_121 GBV_ILN_267 GBV_ILN_2010 GBV_ILN_2015 GBV_ILN_2021 GBV_ILN_4012 GBV_ILN_4125 GBV_ILN_4277 GBV_ILN_4302 GBV_ILN_4320 VA 8360 AR 72 2017 9 01 09 665-670 |
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10.1515/znb-2017-0079 doi (DE-627)OLC2141289912 (DE-B1597)znb-2017-0079-p DE-627 ger DE-627 rakwb 540 VZ 540 VZ VA 8360 VZ rvk Zhu, Lingling verfasserin aut Influences of $ NH_{4} $F additive and calcination time on the morphological evolution of α-$ Al_{2} $$ O_{3} $ from a milled γ-$ Al_{2} $$ O_{3} $ precursor 2017 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier ©2017 Walter de Gruyter GmbH, Berlin/Boston Abstract The influences of an $ NH_{4} $F additive content and calcination time on the morphological evolution of α-$ Al_{2} $$ O_{3} $ were investigated by using commercial γ-$ Al_{2} $$ O_{3} $ precursor as raw material. The results showed that the morphological evolution of α-$ Al_{2} $$ O_{3} $ was highly related to the addition of $ NH_{4} $F, the additive content, and the calcination time. Square-like α-$ Al_{2} $$ O_{3} $ powders with a primary crystal size of ~200 nm were formed from the milled γ-$ Al_{2} $$ O_{3} $ precursor with 1 wt.% $ NH_{4} $F at 1300°C for 2 h, whereas round cake-like, hexagonal platelets, slender-like, and other irregularly shaped α-$ Al_{2} $$ O_{3} $ pieces in the size range of 0.2–2 μm were synthesized from the milled γ-$ Al_{2} $$ O_{3} $ precursor with 20 wt.% $ NH_{4} $F addition under the same calcination. Both morphological regularity and particle size distribution of α-$ Al_{2} $$ O_{3} $ were greatly facilitated by increasing the calcination time from 2 to 5 h. The addition of $ NH_{4} $F may lead to an alteration of the α-$ Al_{2} $$ O_{3} $ growth process by a change in the scale of the developing microstructure. Sun, Chunhui aut Chen, Liugang aut Lu, Xifeng aut Li, Sai aut Ye, Guotian aut Liu, Luoqiang aut Enthalten in Zeitschrift für Naturforschung. B, Chemical sciences De Gruyter, 1947 72(2017), 9 vom: 01. Sept., Seite 665-670 (DE-627)129307386 (DE-600)124635-5 (DE-576)014504928 0932-0776 nnns volume:72 year:2017 number:9 day:01 month:09 pages:665-670 https://doi.org/10.1515/znb-2017-0079 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY SSG-OLC-CHE SSG-OLC-FOR SSG-OPC-FOR GBV_ILN_24 GBV_ILN_59 GBV_ILN_70 GBV_ILN_121 GBV_ILN_267 GBV_ILN_2010 GBV_ILN_2015 GBV_ILN_2021 GBV_ILN_4012 GBV_ILN_4125 GBV_ILN_4277 GBV_ILN_4302 GBV_ILN_4320 VA 8360 AR 72 2017 9 01 09 665-670 |
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Enthalten in Zeitschrift für Naturforschung. B, Chemical sciences 72(2017), 9 vom: 01. Sept., Seite 665-670 volume:72 year:2017 number:9 day:01 month:09 pages:665-670 |
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Influences of $ NH_{4} $F additive and calcination time on the morphological evolution of α-$ Al_{2} $$ O_{3} $ from a milled γ-$ Al_{2} $$ O_{3} $ precursor |
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Influences of $ NH_{4} $F additive and calcination time on the morphological evolution of α-$ Al_{2} $$ O_{3} $ from a milled γ-$ Al_{2} $$ O_{3} $ precursor |
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influences of $ nh_{4} $f additive and calcination time on the morphological evolution of α-$ al_{2} $$ o_{3} $ from a milled γ-$ al_{2} $$ o_{3} $ precursor |
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Influences of $ NH_{4} $F additive and calcination time on the morphological evolution of α-$ Al_{2} $$ O_{3} $ from a milled γ-$ Al_{2} $$ O_{3} $ precursor |
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Abstract The influences of an $ NH_{4} $F additive content and calcination time on the morphological evolution of α-$ Al_{2} $$ O_{3} $ were investigated by using commercial γ-$ Al_{2} $$ O_{3} $ precursor as raw material. The results showed that the morphological evolution of α-$ Al_{2} $$ O_{3} $ was highly related to the addition of $ NH_{4} $F, the additive content, and the calcination time. Square-like α-$ Al_{2} $$ O_{3} $ powders with a primary crystal size of ~200 nm were formed from the milled γ-$ Al_{2} $$ O_{3} $ precursor with 1 wt.% $ NH_{4} $F at 1300°C for 2 h, whereas round cake-like, hexagonal platelets, slender-like, and other irregularly shaped α-$ Al_{2} $$ O_{3} $ pieces in the size range of 0.2–2 μm were synthesized from the milled γ-$ Al_{2} $$ O_{3} $ precursor with 20 wt.% $ NH_{4} $F addition under the same calcination. Both morphological regularity and particle size distribution of α-$ Al_{2} $$ O_{3} $ were greatly facilitated by increasing the calcination time from 2 to 5 h. The addition of $ NH_{4} $F may lead to an alteration of the α-$ Al_{2} $$ O_{3} $ growth process by a change in the scale of the developing microstructure. ©2017 Walter de Gruyter GmbH, Berlin/Boston |
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Abstract The influences of an $ NH_{4} $F additive content and calcination time on the morphological evolution of α-$ Al_{2} $$ O_{3} $ were investigated by using commercial γ-$ Al_{2} $$ O_{3} $ precursor as raw material. The results showed that the morphological evolution of α-$ Al_{2} $$ O_{3} $ was highly related to the addition of $ NH_{4} $F, the additive content, and the calcination time. Square-like α-$ Al_{2} $$ O_{3} $ powders with a primary crystal size of ~200 nm were formed from the milled γ-$ Al_{2} $$ O_{3} $ precursor with 1 wt.% $ NH_{4} $F at 1300°C for 2 h, whereas round cake-like, hexagonal platelets, slender-like, and other irregularly shaped α-$ Al_{2} $$ O_{3} $ pieces in the size range of 0.2–2 μm were synthesized from the milled γ-$ Al_{2} $$ O_{3} $ precursor with 20 wt.% $ NH_{4} $F addition under the same calcination. Both morphological regularity and particle size distribution of α-$ Al_{2} $$ O_{3} $ were greatly facilitated by increasing the calcination time from 2 to 5 h. The addition of $ NH_{4} $F may lead to an alteration of the α-$ Al_{2} $$ O_{3} $ growth process by a change in the scale of the developing microstructure. ©2017 Walter de Gruyter GmbH, Berlin/Boston |
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Abstract The influences of an $ NH_{4} $F additive content and calcination time on the morphological evolution of α-$ Al_{2} $$ O_{3} $ were investigated by using commercial γ-$ Al_{2} $$ O_{3} $ precursor as raw material. The results showed that the morphological evolution of α-$ Al_{2} $$ O_{3} $ was highly related to the addition of $ NH_{4} $F, the additive content, and the calcination time. Square-like α-$ Al_{2} $$ O_{3} $ powders with a primary crystal size of ~200 nm were formed from the milled γ-$ Al_{2} $$ O_{3} $ precursor with 1 wt.% $ NH_{4} $F at 1300°C for 2 h, whereas round cake-like, hexagonal platelets, slender-like, and other irregularly shaped α-$ Al_{2} $$ O_{3} $ pieces in the size range of 0.2–2 μm were synthesized from the milled γ-$ Al_{2} $$ O_{3} $ precursor with 20 wt.% $ NH_{4} $F addition under the same calcination. Both morphological regularity and particle size distribution of α-$ Al_{2} $$ O_{3} $ were greatly facilitated by increasing the calcination time from 2 to 5 h. The addition of $ NH_{4} $F may lead to an alteration of the α-$ Al_{2} $$ O_{3} $ growth process by a change in the scale of the developing microstructure. ©2017 Walter de Gruyter GmbH, Berlin/Boston |
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