Effect of nonstoichiometry on the structure and microwave dielectric properties of Ba1 − x(Zn1/2W1/2)O3 − x and Ba(Zn1/2 − yW1/2)O3 − y/2

被引：0
|
作者：
D. A. Durilin
O. V. Ovchar
A. G. Belous
机构：
[1] National Academy of Sciences of Ukraine,Vernadsky Institute of General and Inorganic Chemistry
来源：
Inorganic Materials | 2011年 / 47卷
关键词：
Perovskite; Scheelite; Microwave Dielectric Property; Superlattice Reflection; BaWO4;
D O I：
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中图分类号：
学科分类号：
摘要：
We have synthesized Ba1 − x(Zn1/2W1/2)O3 − x and Ba(Zn1/2 − yW1/2)O3 − y/2 barium tungstates with different deviations from cation stoichiometry (x = 0.01–0.05, y = 0.01–0.05), determined the phase composition of ceramics fabricated from the tungstates, and investigated their electrical properties. Even slight deviations from cation stoichiometry in Ba(Zn1/2W1/2)O3 lead to the formation of the scheelite phase BaWO4, and its content increases with heat-treatment temperature. Barium or zinc deficiency in the systems studied improves the sintering behavior of Ba(Zn1/2W1/2)O3 and increases the degree of 1: 1 B-site cation ordering, which in turn ensures an increase in microwave quality factor, Q.
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页码：313 / 316
页数：3
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