Antiferroelectric-ferroelectric phase transitions in Pb1-x Bax Zr O3 ceramics: Effect of PbO content
The irreversibility of the antiferroelectric (AFE) to FE phase transition in Pb1-x Bax Zr O3, x=0.75-0.1, compositions is shown to be a consequence of lattice vacancies arising from PbO evaporation during ceramic processing. Previously, the absence of a FE→AFE cooling transition was thought to be du...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
2014
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| Online Access: | http://www.scopus.com/inward/record.url?eid=2-s2.0-40549110595&partnerID=40&md5=5ff1c58df8367adf4f6a3c46e94ee24f http://cmuir.cmu.ac.th/handle/6653943832/5597 |
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| Summary: | The irreversibility of the antiferroelectric (AFE) to FE phase transition in Pb1-x Bax Zr O3, x=0.75-0.1, compositions is shown to be a consequence of lattice vacancies arising from PbO evaporation during ceramic processing. Previously, the absence of a FE→AFE cooling transition was thought to be due to the transformational strain and the fragmentation of ferroelectric domains. Appropriate compensating levels of excess PbO added to starting powders generate the FE→AFE transition. For lower levels of Ba2+ substitution, x=0.05, the transition is reversible in noncompensated samples, but PbO compensation raises the FE→AFE transition temperature by ∼25 °C. © 2008 American Institute of Physics. |
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