Role of Liquid Phase in PTCR Characteristics of (Ba0.7Sr0.3)TiO3 Ceramics
The role of liquid phase in the enhancement of the PTCR (positive temperature coefficient of resistance) effect in (Ba0.7Sr0.3)TiO3 (BST) with the addition of AST (4Al2O3· 9SiO2· 3TiO2) is investigated in this paper. The AST–BST samples were characterized with optical microscopy, transmission electr...
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| Autor*in: |
Lee, Jung-Kun [verfasserIn] Park, Jong-Sung [verfasserIn] Hong, Kug-Sun [verfasserIn] |
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| Format: |
E-Artikel |
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| Erschienen: |
Westerville, Ohio: American Ceramics Society ; 2002 |
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Online-Ressource |
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2004 ; Blackwell Publishing Journal Backfiles 1879-2005 |
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In: Journal of the American Ceramic Society - American Ceramic Society ; GKD-ID: 6113X, Oxford [u.a.] : Wiley-Blackwell, 1918, 85(2002), 5, Seite 0 |
| Übergeordnetes Werk: |
volume:85 ; year:2002 ; number:5 ; pages:0 |
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| DOI / URN: |
10.1111/j.1151-2916.2002.tb00241.x |
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| 520 | |a The role of liquid phase in the enhancement of the PTCR (positive temperature coefficient of resistance) effect in (Ba0.7Sr0.3)TiO3 (BST) with the addition of AST (4Al2O3· 9SiO2· 3TiO2) is investigated in this paper. The AST–BST samples were characterized with optical microscopy, transmission electron microscopy, energy-dispersive spectroscopy, and impedance spectroscopy. Microscopic observations showed that slower cooling might facilitate the precipitation of the (Ba,Sr)TiO3 phase from the liquid phase on matrix grains since the amount of liquid phase was reduced with a decreasing cooling rate. Impedance spectroscopy indicated that this variation accompanied the change in the intrinsic properties of grain boundaries, which could not be explained by well-known oxidation effects. With the aid of a brick-layer model and high-resolution transmission electron microscopy (HRTEM), it appeared that the change in electrical characteristics of grain boundaries with decreasing cooling rate originated from the precipitation of (Ba,Sr)TiO3. Finally, the effect of precipitated (Ba,Sr)TiO3 on the PTCR characteristics is discussed in terms of the acceptor-state density and the polarization state at grain boundaries. | ||
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10.1111/j.1151-2916.2002.tb00241.x doi (DE-627)NLEJ243460805 DE-627 ger DE-627 rakwb Lee, Jung-Kun verfasserin aut Role of Liquid Phase in PTCR Characteristics of (Ba0.7Sr0.3)TiO3 Ceramics Westerville, Ohio American Ceramics Society 2002 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The role of liquid phase in the enhancement of the PTCR (positive temperature coefficient of resistance) effect in (Ba0.7Sr0.3)TiO3 (BST) with the addition of AST (4Al2O3· 9SiO2· 3TiO2) is investigated in this paper. The AST–BST samples were characterized with optical microscopy, transmission electron microscopy, energy-dispersive spectroscopy, and impedance spectroscopy. Microscopic observations showed that slower cooling might facilitate the precipitation of the (Ba,Sr)TiO3 phase from the liquid phase on matrix grains since the amount of liquid phase was reduced with a decreasing cooling rate. Impedance spectroscopy indicated that this variation accompanied the change in the intrinsic properties of grain boundaries, which could not be explained by well-known oxidation effects. With the aid of a brick-layer model and high-resolution transmission electron microscopy (HRTEM), it appeared that the change in electrical characteristics of grain boundaries with decreasing cooling rate originated from the precipitation of (Ba,Sr)TiO3. Finally, the effect of precipitated (Ba,Sr)TiO3 on the PTCR characteristics is discussed in terms of the acceptor-state density and the polarization state at grain boundaries. 2004 Blackwell Publishing Journal Backfiles 1879-2005 |2004|||||||||| positive temperature coefficient of resistivity Park, Jong-Sung verfasserin aut Hong, Kug-Sun verfasserin aut Ko, Kyung-Hyun oth Lee, Byung-Chan oth In American Ceramic Society ; GKD-ID: 6113X Journal of the American Ceramic Society Oxford [u.a.] : Wiley-Blackwell, 1918 85(2002), 5, Seite 0 Online-Ressource (DE-627)NLEJ243927835 (DE-600)2008170-4 1551-2916 nnns volume:85 year:2002 number:5 pages:0 http://dx.doi.org/10.1111/j.1151-2916.2002.tb00241.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 85 2002 5 0 |
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10.1111/j.1151-2916.2002.tb00241.x doi (DE-627)NLEJ243460805 DE-627 ger DE-627 rakwb Lee, Jung-Kun verfasserin aut Role of Liquid Phase in PTCR Characteristics of (Ba0.7Sr0.3)TiO3 Ceramics Westerville, Ohio American Ceramics Society 2002 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The role of liquid phase in the enhancement of the PTCR (positive temperature coefficient of resistance) effect in (Ba0.7Sr0.3)TiO3 (BST) with the addition of AST (4Al2O3· 9SiO2· 3TiO2) is investigated in this paper. The AST–BST samples were characterized with optical microscopy, transmission electron microscopy, energy-dispersive spectroscopy, and impedance spectroscopy. Microscopic observations showed that slower cooling might facilitate the precipitation of the (Ba,Sr)TiO3 phase from the liquid phase on matrix grains since the amount of liquid phase was reduced with a decreasing cooling rate. Impedance spectroscopy indicated that this variation accompanied the change in the intrinsic properties of grain boundaries, which could not be explained by well-known oxidation effects. With the aid of a brick-layer model and high-resolution transmission electron microscopy (HRTEM), it appeared that the change in electrical characteristics of grain boundaries with decreasing cooling rate originated from the precipitation of (Ba,Sr)TiO3. Finally, the effect of precipitated (Ba,Sr)TiO3 on the PTCR characteristics is discussed in terms of the acceptor-state density and the polarization state at grain boundaries. 2004 Blackwell Publishing Journal Backfiles 1879-2005 |2004|||||||||| positive temperature coefficient of resistivity Park, Jong-Sung verfasserin aut Hong, Kug-Sun verfasserin aut Ko, Kyung-Hyun oth Lee, Byung-Chan oth In American Ceramic Society ; GKD-ID: 6113X Journal of the American Ceramic Society Oxford [u.a.] : Wiley-Blackwell, 1918 85(2002), 5, Seite 0 Online-Ressource (DE-627)NLEJ243927835 (DE-600)2008170-4 1551-2916 nnns volume:85 year:2002 number:5 pages:0 http://dx.doi.org/10.1111/j.1151-2916.2002.tb00241.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 85 2002 5 0 |
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10.1111/j.1151-2916.2002.tb00241.x doi (DE-627)NLEJ243460805 DE-627 ger DE-627 rakwb Lee, Jung-Kun verfasserin aut Role of Liquid Phase in PTCR Characteristics of (Ba0.7Sr0.3)TiO3 Ceramics Westerville, Ohio American Ceramics Society 2002 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The role of liquid phase in the enhancement of the PTCR (positive temperature coefficient of resistance) effect in (Ba0.7Sr0.3)TiO3 (BST) with the addition of AST (4Al2O3· 9SiO2· 3TiO2) is investigated in this paper. The AST–BST samples were characterized with optical microscopy, transmission electron microscopy, energy-dispersive spectroscopy, and impedance spectroscopy. Microscopic observations showed that slower cooling might facilitate the precipitation of the (Ba,Sr)TiO3 phase from the liquid phase on matrix grains since the amount of liquid phase was reduced with a decreasing cooling rate. Impedance spectroscopy indicated that this variation accompanied the change in the intrinsic properties of grain boundaries, which could not be explained by well-known oxidation effects. With the aid of a brick-layer model and high-resolution transmission electron microscopy (HRTEM), it appeared that the change in electrical characteristics of grain boundaries with decreasing cooling rate originated from the precipitation of (Ba,Sr)TiO3. Finally, the effect of precipitated (Ba,Sr)TiO3 on the PTCR characteristics is discussed in terms of the acceptor-state density and the polarization state at grain boundaries. 2004 Blackwell Publishing Journal Backfiles 1879-2005 |2004|||||||||| positive temperature coefficient of resistivity Park, Jong-Sung verfasserin aut Hong, Kug-Sun verfasserin aut Ko, Kyung-Hyun oth Lee, Byung-Chan oth In American Ceramic Society ; GKD-ID: 6113X Journal of the American Ceramic Society Oxford [u.a.] : Wiley-Blackwell, 1918 85(2002), 5, Seite 0 Online-Ressource (DE-627)NLEJ243927835 (DE-600)2008170-4 1551-2916 nnns volume:85 year:2002 number:5 pages:0 http://dx.doi.org/10.1111/j.1151-2916.2002.tb00241.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 85 2002 5 0 |
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10.1111/j.1151-2916.2002.tb00241.x doi (DE-627)NLEJ243460805 DE-627 ger DE-627 rakwb Lee, Jung-Kun verfasserin aut Role of Liquid Phase in PTCR Characteristics of (Ba0.7Sr0.3)TiO3 Ceramics Westerville, Ohio American Ceramics Society 2002 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The role of liquid phase in the enhancement of the PTCR (positive temperature coefficient of resistance) effect in (Ba0.7Sr0.3)TiO3 (BST) with the addition of AST (4Al2O3· 9SiO2· 3TiO2) is investigated in this paper. The AST–BST samples were characterized with optical microscopy, transmission electron microscopy, energy-dispersive spectroscopy, and impedance spectroscopy. Microscopic observations showed that slower cooling might facilitate the precipitation of the (Ba,Sr)TiO3 phase from the liquid phase on matrix grains since the amount of liquid phase was reduced with a decreasing cooling rate. Impedance spectroscopy indicated that this variation accompanied the change in the intrinsic properties of grain boundaries, which could not be explained by well-known oxidation effects. With the aid of a brick-layer model and high-resolution transmission electron microscopy (HRTEM), it appeared that the change in electrical characteristics of grain boundaries with decreasing cooling rate originated from the precipitation of (Ba,Sr)TiO3. Finally, the effect of precipitated (Ba,Sr)TiO3 on the PTCR characteristics is discussed in terms of the acceptor-state density and the polarization state at grain boundaries. 2004 Blackwell Publishing Journal Backfiles 1879-2005 |2004|||||||||| positive temperature coefficient of resistivity Park, Jong-Sung verfasserin aut Hong, Kug-Sun verfasserin aut Ko, Kyung-Hyun oth Lee, Byung-Chan oth In American Ceramic Society ; GKD-ID: 6113X Journal of the American Ceramic Society Oxford [u.a.] : Wiley-Blackwell, 1918 85(2002), 5, Seite 0 Online-Ressource (DE-627)NLEJ243927835 (DE-600)2008170-4 1551-2916 nnns volume:85 year:2002 number:5 pages:0 http://dx.doi.org/10.1111/j.1151-2916.2002.tb00241.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 85 2002 5 0 |
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10.1111/j.1151-2916.2002.tb00241.x doi (DE-627)NLEJ243460805 DE-627 ger DE-627 rakwb Lee, Jung-Kun verfasserin aut Role of Liquid Phase in PTCR Characteristics of (Ba0.7Sr0.3)TiO3 Ceramics Westerville, Ohio American Ceramics Society 2002 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The role of liquid phase in the enhancement of the PTCR (positive temperature coefficient of resistance) effect in (Ba0.7Sr0.3)TiO3 (BST) with the addition of AST (4Al2O3· 9SiO2· 3TiO2) is investigated in this paper. The AST–BST samples were characterized with optical microscopy, transmission electron microscopy, energy-dispersive spectroscopy, and impedance spectroscopy. Microscopic observations showed that slower cooling might facilitate the precipitation of the (Ba,Sr)TiO3 phase from the liquid phase on matrix grains since the amount of liquid phase was reduced with a decreasing cooling rate. Impedance spectroscopy indicated that this variation accompanied the change in the intrinsic properties of grain boundaries, which could not be explained by well-known oxidation effects. With the aid of a brick-layer model and high-resolution transmission electron microscopy (HRTEM), it appeared that the change in electrical characteristics of grain boundaries with decreasing cooling rate originated from the precipitation of (Ba,Sr)TiO3. Finally, the effect of precipitated (Ba,Sr)TiO3 on the PTCR characteristics is discussed in terms of the acceptor-state density and the polarization state at grain boundaries. 2004 Blackwell Publishing Journal Backfiles 1879-2005 |2004|||||||||| positive temperature coefficient of resistivity Park, Jong-Sung verfasserin aut Hong, Kug-Sun verfasserin aut Ko, Kyung-Hyun oth Lee, Byung-Chan oth In American Ceramic Society ; GKD-ID: 6113X Journal of the American Ceramic Society Oxford [u.a.] : Wiley-Blackwell, 1918 85(2002), 5, Seite 0 Online-Ressource (DE-627)NLEJ243927835 (DE-600)2008170-4 1551-2916 nnns volume:85 year:2002 number:5 pages:0 http://dx.doi.org/10.1111/j.1151-2916.2002.tb00241.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 85 2002 5 0 |
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Role of Liquid Phase in PTCR Characteristics of (Ba0.7Sr0.3)TiO3 Ceramics |
| abstract |
The role of liquid phase in the enhancement of the PTCR (positive temperature coefficient of resistance) effect in (Ba0.7Sr0.3)TiO3 (BST) with the addition of AST (4Al2O3· 9SiO2· 3TiO2) is investigated in this paper. The AST–BST samples were characterized with optical microscopy, transmission electron microscopy, energy-dispersive spectroscopy, and impedance spectroscopy. Microscopic observations showed that slower cooling might facilitate the precipitation of the (Ba,Sr)TiO3 phase from the liquid phase on matrix grains since the amount of liquid phase was reduced with a decreasing cooling rate. Impedance spectroscopy indicated that this variation accompanied the change in the intrinsic properties of grain boundaries, which could not be explained by well-known oxidation effects. With the aid of a brick-layer model and high-resolution transmission electron microscopy (HRTEM), it appeared that the change in electrical characteristics of grain boundaries with decreasing cooling rate originated from the precipitation of (Ba,Sr)TiO3. Finally, the effect of precipitated (Ba,Sr)TiO3 on the PTCR characteristics is discussed in terms of the acceptor-state density and the polarization state at grain boundaries. |
| abstractGer |
The role of liquid phase in the enhancement of the PTCR (positive temperature coefficient of resistance) effect in (Ba0.7Sr0.3)TiO3 (BST) with the addition of AST (4Al2O3· 9SiO2· 3TiO2) is investigated in this paper. The AST–BST samples were characterized with optical microscopy, transmission electron microscopy, energy-dispersive spectroscopy, and impedance spectroscopy. Microscopic observations showed that slower cooling might facilitate the precipitation of the (Ba,Sr)TiO3 phase from the liquid phase on matrix grains since the amount of liquid phase was reduced with a decreasing cooling rate. Impedance spectroscopy indicated that this variation accompanied the change in the intrinsic properties of grain boundaries, which could not be explained by well-known oxidation effects. With the aid of a brick-layer model and high-resolution transmission electron microscopy (HRTEM), it appeared that the change in electrical characteristics of grain boundaries with decreasing cooling rate originated from the precipitation of (Ba,Sr)TiO3. Finally, the effect of precipitated (Ba,Sr)TiO3 on the PTCR characteristics is discussed in terms of the acceptor-state density and the polarization state at grain boundaries. |
| abstract_unstemmed |
The role of liquid phase in the enhancement of the PTCR (positive temperature coefficient of resistance) effect in (Ba0.7Sr0.3)TiO3 (BST) with the addition of AST (4Al2O3· 9SiO2· 3TiO2) is investigated in this paper. The AST–BST samples were characterized with optical microscopy, transmission electron microscopy, energy-dispersive spectroscopy, and impedance spectroscopy. Microscopic observations showed that slower cooling might facilitate the precipitation of the (Ba,Sr)TiO3 phase from the liquid phase on matrix grains since the amount of liquid phase was reduced with a decreasing cooling rate. Impedance spectroscopy indicated that this variation accompanied the change in the intrinsic properties of grain boundaries, which could not be explained by well-known oxidation effects. With the aid of a brick-layer model and high-resolution transmission electron microscopy (HRTEM), it appeared that the change in electrical characteristics of grain boundaries with decreasing cooling rate originated from the precipitation of (Ba,Sr)TiO3. Finally, the effect of precipitated (Ba,Sr)TiO3 on the PTCR characteristics is discussed in terms of the acceptor-state density and the polarization state at grain boundaries. |
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Role of Liquid Phase in PTCR Characteristics of (Ba0.7Sr0.3)TiO3 Ceramics |
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Park, Jong-Sung Hong, Kug-Sun Ko, Kyung-Hyun Lee, Byung-Chan |
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