Ferroelectric Properties and Microstructures of La2O3-Doped Bi4Ti3O12 Ceramics
Keyword(s):
The electrical properties of La-doped bismuth titanate, Bi4-xLaxTi3O12(BLT) ceramics prepared by a conventional electroceramic technique have been investigated. XRD analyses revealed Bi-layered perovskite structure in all samples, and indicted that Bi ions were only substituted near the Ti-O octahedron layers by La ions. SEM micrographs show randomly oriented and plate-like morphology. The remanent polarization ( Pr) and coercive field ( Ec) of the BLT ceramic with x=0.75 were above 19μC/cm2and 60KV/cm, respectively. The large value of remanent polarization and low coercive field of La-doped bismuth titanate ceramics promote these materials to potential applications.
2014 ◽
Vol 633
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pp. 265-268
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2008 ◽
Vol 368-372
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pp. 95-97