THERMODYNAMIC STABILITY AND MECHANISMS OF FORMATION AND DECOMPOSITION OF PEROVSKITE PB(ZN1/3NB2/3)O3 PREPARED BY THE PBO FLUX METHOD
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- Title
- THERMODYNAMIC STABILITY AND MECHANISMS OF FORMATION AND DECOMPOSITION OF PEROVSKITE PB(ZN1/3NB2/3)O3 PREPARED BY THE PBO FLUX METHOD
- Authors
- JANG, HM; MOON, JH; OH, SH
- Date Issued
- 1992-01
- Publisher
- AMER CERAMIC SOC
- Abstract
- The mechanisms of formation and decomposition of the ferroelectric perovskite PZN [Pb(Zn1/3Nb2/3)O3] were examined. The formation of perovskite PZN from the excess molten PbO environment is characterized by an initial rapid formation of pyrochlore phase, followed by a subsequent reaction between the intermediate pyrochlore phase, ZnO, and liquid PbO to produce perovskite phase. The pure perovskite PZN crystal prepared by the PbO flux method is thermodynamically unstable over a wide range of temperature (600-degrees to 1400-degrees-C), yielding pyrochlore phase and PbO as the decomposition products. The decomposition reaction of perovskite PZN proceeded uniformly with a spatial homogeneity throughout the specimen. The estimated activation energy of the decomposition reaction is approximately 18 kcal/mol.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/22214
- DOI
- 10.1111/j.1151-2916.1992.tb05446.x
- ISSN
- 0002-7820
- Article Type
- Article
- Citation
- JOURNAL OF THE AMERICAN CERAMIC SOCIETY, vol. 75, no. 1, page. 82 - 88, 1992-01
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