采用固相反应法研究了Zr4+B位取代Ti4+对Ba6-3xLa8+2xTi18O54(x=2/3)陶瓷结构和介电性能等的影响.结果表明:Zr4+B位取代可使Ba6-3xLa8+2xTi18O54(x=2/3)陶瓷的烧结温度从1 350 ℃升高到1 600 ℃;在一定范围内Zr4+取代Ti4+可形成单相类钙钛矿钨青铜型固溶体,Zr4+最大固溶度不超过0.2,超过这一范围,Ba2ZrO4会作为第二相出现在固溶体中;少量Zr4+取代Ti4+使Ba6-3xLa8+2x(Ti1-zZrz)18O54(x=2/3)陶瓷的品质因数大幅度提高,谐振频率温度系数得到改善,但介电常数下降;当Zr4+掺杂量z=0.05时,1 400 ℃保温2 h烧结后陶瓷获得较佳的微波介电性能,εr=86.83,Qf=5 875 GHz,τf=81.99×10-6/℃.
所属栏目
新材料 新工艺国防科工委军品配套项目
收稿日期
2009/5/22009/12/9
作者单位
高旭芳:南京工业大学材料科学与工程学院, 南京 210009
丘泰:南京工业大学材料科学与工程学院, 南京 210009
备注
高旭芳(1984-),女,江苏南通人,硕士研究生.
引用该论文:
GAO Xu-fang,QIU Tai.Effect of Zr4+ B Site Substitution on Structure and Dielectric Properties of Ba6-3xLa8+2xTi18O54(x=2/3)Ceramics[J].Materials for mechancial engineering,2010,34(5):36～39
高旭芳,丘泰.Zr4+B位取代对Ba6-3xLa8+2xTi18O54(x=2/3)陶瓷结构及介电性能的影响[J].机械工程材料,2010,34(5):36～39
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