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Liquid-phase sintered bismuth ferrite multiferroics and their giant dielectric constant
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DOI：10.1016/j.ceramint.2019.04.220.png)
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Abstract
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Rapid liquid-phase sintering method has been modified and used to synthesize Bi1-xLaxFeO3-delta compositions (0 <= x <= 0.5). The temperature and sintering procedures to obtain stable single-phase samples have been defined. This provides a significant reduction in the synthesis time, which is especially important for mass production. Furthermore, giant dielectric constants have been observed in Bi1-xLaxFeO3-delta compositions, the values of which are one order of magnitude larger than those of similar Bi-based multiferroics obtained by conventional methods. It potentially makes them one of the most promising materials for modern technological applications.
Keywords:
Giant dielectric constant
Multiferroics
Perovskite structure
Defect structure
Rapid liquid-phase sintering method
XPS spectroscopy
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