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Na2O含量对BaO-SrO-Nb2O5-B2O3-SiO2系玻璃陶瓷微结构和性能的影响
引用本文:张文俊,陈国华,周昌荣,江民红,王华,刘心宇.Na2O含量对BaO-SrO-Nb2O5-B2O3-SiO2系玻璃陶瓷微结构和性能的影响[J].中国有色金属学报,2011,21(6).
作者姓名:张文俊  陈国华  周昌荣  江民红  王华  刘心宇
作者单位:1. 桂林电子科技大学材料科学与工程学院,桂林,541004
2. 桂林电子科技大学材料科学与工程学院,桂林541004;桂林电子科技大学广西信息材料重点实验室,桂林541004
基金项目:广西信息材料重点实验室基金资助项目
摘    要:采用熔融法制备NaO-BaO-SrO-Nb2Os-B2O3-SiO2玻璃陶瓷.借助DSC、XRD、SEM和电学性能测试研究不同含量的Na2O对其相组成、显微结构、介电性能、体积电阻率及击穿强度的影响.结果表明随着Na2O含量(摩尔分数)的增加,玻璃转变温度(Tg)和第一析晶放热峰(Tg1)温度逐渐降低,而第二析晶放热峰温度(Tg2)呈先降低后升高再降低的变化.经(800℃,3h)+(900℃,3h)热处理后,未添加Na2O的样品析出单相四方钨青铜结构的Ba0.5Sr0.5Nb2O6,而添加5%Na2O(摩尔分数)的样品变为单相Ba0.25Sr0.75Nb2O6.当Na2O为10%时,样品的主晶相仍为Ba0.25Sr0.75Nb2O6,但析出NaSr1.2Ba0.8Nb5O15和Na2Ba2Si2O7相;继续增加Na2O量到15%时,样品的晶相种类不变而衍射峰强度有所增强.样品的介电常数随Na2O含量的增加呈“N”字形变化,样品的体积电阻率和击穿强度随Na2O含量的增加而降低,未添加Na2O试样的击穿强度最大为1500kWcm,其储能密度达3J/cm3.

关 键 词:玻璃陶瓷  电学性能  微结构  击穿强度  储能密度

Effects of Na2O content on microstructure and properties of NaO-BaO-SrO-Nb2O5-B2O3-SiO2 system glass-ceramics
ZHANG Wen-jun,CHEN Guo-hua,ZHOU Chang-rong,JIANG Min-hong,WANG Hua,LIU Xin-yu.Effects of Na2O content on microstructure and properties of NaO-BaO-SrO-Nb2O5-B2O3-SiO2 system glass-ceramics[J].The Chinese Journal of Nonferrous Metals,2011,21(6).
Authors:ZHANG Wen-jun  CHEN Guo-hua  ZHOU Chang-rong  JIANG Min-hong  WANG Hua  LIU Xin-yu
Affiliation:ZHANG Wen-jun1,CHEN Guo-hua1,2,ZHOU Chang-rong1,JIANG Min-hong1,WANG Hua1,LIU Xin-yu1,2 (1.School of Materials Science and Engineering,Guilin University of Electronic Technology,Guilin 541004,China,2.Guangxi Key Laboratory of Information Materials,China)
Abstract:NaO-BaO-SrO-Nb2O5-B2O3-SiO2 glass-ceramics were prepared using melting method.The effects of different Na2O contents on the phase compositions,microstructure,dielectric properties,volume resistivity and breakdown strength were investigated by differential scanning calorimetry(DSC),X-ray diffractometry(XRD),scanning electric microscopy(SEM) and electrical property measurements.The results show that with increasing Na2O content,the glass transition temperature(Tg) and the first crystallization peak temperatur...
Keywords:glass-ceramic  electrical properties  microstructure  breakdown strength  energy density  
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