Effects of Sr substitution on microwave dielectric properties of Ba3LaNb3O12 ceramics
Effects of Sr substitution on microwave dielectric properties of Ba3LaNb3O12 ceramics
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DOI：
10.1016/j.jallcom.2009.07.175
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发表时间：
2009-11
影响因子：
6.2
通讯作者：
Changzheng Hu;L. Fang;H. Su;Laijun Liu;Bo-lin Wu
中科院分区：
文献类型：
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作者：
Changzheng Hu;L. Fang;H. Su;Laijun Liu;Bo-lin Wu
采用传统固相反应法制备了Ba 3 − xSrxLaNb 3 O 12（x=0-3）陶瓷。它们均为A_4B_3O_（12）缺阳离子六方钙钛矿结构。Sr取代Ba有效地提高了Ba 3LaNb 3 O 12的品质因数，并改变了其τ f。随着Sr含量的增加，Q×f值从16，000增加到45，327 GHz，τ从-96增加到-9ppm/°C，介电常数从44.8逐渐增加到35.8。
Ba3−xSrxLaNb3O12(x=0–3) ceramics were prepared by conventional solid-state reaction route. All of them adopt A4B3O12cation-deficient hexagonal perovskite structure. The substitution of Sr for Ba effectively enhances quality factor and modifies τfof Ba3LaNb3O12. The Q×f value increases significantly from 16,000 to 45,327GHz, τfimproves from −96 to −9ppm/°C and the dielectric constant (ɛr) varies gradually from 44.8 to 35.8 with the increase of Sr content.