A-Site (MCe) Substitution Effects on the Structures and Properties of CaBi4Ti4O15 Ceramics
A-Site (MCe) Substitution Effects on the Structures and Properties of CaBi4Ti4O15 Ceramics
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DOI：
10.1143/jjap.39.6339
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发表时间：
2000-11
影响因子：
1.5
通讯作者：
Haixue Yan;Chengen Li;Jiaguang Zhou;Weimin Zhu;Lian-xing He;Yuxin Song
中科院分区：
文献类型：
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作者：
Haixue Yan;Chengen Li;Jiaguang Zhou;Weimin Zhu;Lian-xing He;Yuxin Song
我们研究了A位化合物取代对Ca0.8(MCe)0.1Bi4Ti4O15（M表示Li、Na和K）陶瓷结构和性能的影响。样品是通过传统的陶瓷技术制备的。讨论了Ca0.8(MCe)0.1Bi4Ti4O15和CaBi4Ti4O15陶瓷的烧结特性。三种改性CBT基化合物的X射线粉末衍射图显示出m=4的单相氧化铋层状结构。还测量了四种化合物的极化相对于电场的磁滞回线。 A位化合物取代提高了这些材料的压电性能和高温电阻率。 A位（LiCe）和（KCe）取代不仅提高了居里温度，而且降低了介电常数温度系数（TKε）。三种改性陶瓷中，只有Ca0.8(NaCe)0.1Bi4Ti4O15的居里温度低于CaBi4Ti4O15；但其 TKε 最低。结果发现，所有三种改性CBT基陶瓷都是优异的高温压电材料。
We investigated the effect of A-site compound substitution on the structures and properties of Ca0.8(MCe)0.1Bi4Ti4O15 (M denotes Li, Na and K) ceramics. The samples were prepared by the conventional ceramic technique. Sintering characteristics of Ca0.8(MCe)0.1Bi4Ti4O15 and CaBi4Ti4O15 ceramics were discussed. X-ray powder diffraction patterns of the three modified CBT-based compounds show a single phase of bismuth oxide layer type structure with m=4. The hysteresis loops of polarization versus electric field of the four compounds were also measured. A-site compound substitution improves the piezoelectric properties and the high-temperature resistivity of these materials. A-site (LiCe) and (KCe) substitution not only improves the Curie temperature but also decreases the temperature coefficient of dielectric constant (TKε). Among the three modified ceramics, only the Curie temperature of Ca0.8(NaCe)0.1Bi4Ti4O15 is lower than that of CaBi4Ti4O15; however, its TKε is the lowest. As a result, all the three modified CBT-based ceramics were found to be excellent high-temperature piezoelectric materials.