硅酸盐学报

非化学计量比铌酸锌微波介电陶瓷的低温烧结行为

作者：张云丁士华宋天秀张晓云黄龙

分类号：TQ174

出版年,卷(期):页码：2019,47(9):0-0

DOI：

摘要：

采用固相烧结工艺制备低损耗、非化学计量比Zn1.01Nb2O6微波介电陶瓷。研究了添加不同量的Li2CO3–B2O3–V2O5 (LBV)对Zn1.01Nb2O6陶瓷烧结温度、表面形貌以及微波介电性能的影响。结果表明：LBV作为助烧剂，在陶瓷烧结过程中产生了液相，当添加剂含量大于1.5% (质量分数)时，LBV与基体陶瓷发生了化学反应。液相的产生、副相LiZnNbO4的形成以及V5+的扩散共同改善了陶瓷的烧结行为，使烧结温度由1 175 ℃低至950 ℃。LBV加入到基体陶瓷后对微波介电性能影响较小。当LBV添加量为1.0%，并在950 ℃保温4 h后，Zn1.01Nb2O6陶瓷微波介电性能最优：εr=20.6，Q×f=90 472 GHz，τf=–85.9×10–6 ℃–1。

基金项目：

西华大学人才支持计划(21030028)；四川省科技计划(2019YFG0234)资助。

作者简介：

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