Dielectric properties of the mixed aurivillius phases MIIBi8Ti7O27 (MII = Ca, Sr, Ba and Pb)
Dielectric properties of the mixed aurivillius phases MIIBi8Ti7O27 (MII = Ca, Sr, Ba and Pb)
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DOI：
10.1016/0955-2219(95)00082-6
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发表时间：
1995
影响因子：
5.7
通讯作者：
R. Maalal;M. Manier;J. Mercurio
中科院分区：
文献类型：
--
作者：
R. Maalal;M. Manier;J. Mercurio
以熔盐法合成的MIIBi8Ti7O27（MII= Ca、Sr、Ba和Pb）粉体为原料，采用自然烧结和热锻工艺制备了陶瓷材料。该材料在室温下是铁电的，并显示出与晶体结构有关的强介电各向异性。在每种情况下，发现作为温度的函数的介电常数的双重异常。它发生的温度取决于MII。这种现象的起源被认为是密切相关的一系列的相变，就像那些已经观察到的其他混合Aurivillius阶段。
Ceramic materials have been prepared by natural sintering and hot-forging MIIBi8Ti7O27(MII= Ca, Sr, Ba and Pb) powders synthesized using a molten salt technique. The materials are ferroelectric at room temperature and show strong dielectric anisotropy in connection with the crystal structure. In each case, a double anomaly of the dielectric permittivity was found as a function of temperature. The temperatures at which it occurs are dependent on MII. The origin of this phenomenon is assumed to be closely related to a sequence of phase transitions like those already observed in other mixed Aurivillius phases.