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Chin. Phys. B, 2014, Vol. 23(4): 047801    DOI: 10.1088/1674-1056/23/4/047801

Effects of BaCu(B2O5) addition on sintering temperature and microwave dielectric properties of Ba5Nb4O15-BaWO4 ceramics

Jia Rui-Long, Su Hua, Tang Xiao-Li, Jing Yu-Lan
State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
Abstract  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 ℃ to 950 ℃ 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 ℃ for 2 h presents good microwave dielectric properties of εr=19.0, high Q× f of 33802 GHz and low τf of 2.5 ppm/℃.
Keywords:  low-temperature co-fired ceramics      composite ceramics      BaCu(B2O5) (BCB)  
Received:  18 June 2013      Revised:  30 September 2013      Accepted manuscript online: 
PACS:  78.20.Ci (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 51372031, 61171047, 51132003, and 61271038), the Program for New Century Excellent Talents in University, China (Grant No. NCET-12-0090), and Science Fund from the Science and Technology Department of Sichuan Province, China (Grant No. 2013GZX0144).
Corresponding Authors:  Su Hua     E-mail:
About author:  78.20.Ci

Cite this article: 

Jia Rui-Long, Su Hua, Tang Xiao-Li, Jing Yu-Lan Effects of BaCu(B2O5) addition on sintering temperature and microwave dielectric properties of Ba5Nb4O15-BaWO4 ceramics 2014 Chin. Phys. B 23 047801

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