中国物理B ›› 2014, Vol. 23 ›› Issue (4): 47801-047801.doi: 10.1088/1674-1056/23/4/047801

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

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

贾瑞龙, 苏桦, 唐晓莉, 荆玉兰   

  1. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
  • 收稿日期:2013-06-18 修回日期:2013-09-30 出版日期:2014-04-15 发布日期:2014-04-15
  • 基金资助:
    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).

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

Jia Rui-Long (贾瑞龙), Su Hua (苏桦), Tang Xiao-Li (唐晓莉), Jing Yu-Lan (荆玉兰)   

  1. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
  • Received:2013-06-18 Revised:2013-09-30 Online:2014-04-15 Published:2014-04-15
  • Contact: Su Hua E-mail:uestcsh@163.com
  • About author:78.20.Ci
  • Supported by:
    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).

摘要: 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/℃.

关键词: low-temperature co-fired ceramics, composite ceramics, BaCu(B2O5) (BCB)

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/℃.

Key words: low-temperature co-fired ceramics, composite ceramics, BaCu(B2O5) (BCB)

中图分类号:  (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))

  • 78.20.Ci