Effects of BaCu(B 2 O 5 ) addition on sintering temperature and microwave dielectric properties of Ba 5 Nb 4 O 15 –BaWO 4 ceramics
Effects of BaCu(B 2 O 5 ) addition on sintering temperature and microwave dielectric properties of Ba 5 Nb 4 O 15 –BaWO 4 ceramics
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DOI：
10.1088/1674-1056/23/4/047801
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发表时间：
2014-02
影响因子：
1.7
通讯作者：
Ruirui Jia;Hua Su;Xiaoli Tang;Y. Jing
中科院分区：
文献类型：
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作者：
Ruirui Jia;Hua Su;Xiaoli Tang;Y. Jing
研究了BaCu（B2 O 5）（BCB）对Ba 5 Nb 4 O 15 − BaWO 4陶瓷的显微结构、相形成和微波介电性能的影响。BaCu（B2 O 5）陶瓷作为烧结助剂，由于液相效应，可以有效地将Ba 5 Nb 4 O 15 − BaWO 4陶瓷的烧结温度从1100 °C降低到950 °C。同时，BaCu（B2 O 5）的加入有效地提高了Ba 5 Nb 4 O 15 − BaWO 4陶瓷的致密化程度，并对陶瓷的微波介电性能产生显著影响。X射线衍射分析表明，烧结陶瓷中Ba 5 Nb 4 O 15和BaWO 4共存，没有BaCu（B2 O 5）晶相。Ba 5 Nb 4 O 15-BaWO 4陶瓷在950 °C烧结2 h，BaCu（B2 O 5）含量为1.0 wt%时，具有良好的微波介电性能，其介电常数er = 19.0，Q×f = 33802 GHz，τf = 2.5 ppm/°C。
The effects of BaCu(B2O5) (BCB) addition on the microstructure, phase formation, and microwave dielectric properties of Ba5Nb4O15−BaWO4 ceramic are investigated. As a sintering aid, BaCu(B2O5) ceramic could effectively lower the sintering temperature of Ba5Nb4O15−BaWO4 ceramic from 1100 °C to 950 °C due to the liquid-phase effect. Meanwhile, BaCu(B2O5) addition effectively improves the densification of Ba5Nb4O15−BaWO4 ceramic and significantly influences the microwave dielectric properties. X-ray diffraction analysis reveals that Ba5Nb4O15 and BaWO4 coexist with no crystal phase of BaCu(B2O5) in the sintered ceramics. The Ba5Nb4O15−BaWO4 ceramics with 1.0 wt% BaCu(B2O5) sintered at 950 °C for 2 h presents good microwave dielectric properties of er = 19.0, high Q×f of 33802 GHz and low τf of 2.5 ppm/°C.