Al_(2)O_(3)添加量对Li_(2)ZnTi_(3)O_(8)陶瓷微波介电性能的影响  

Effect of Al_(2)O_(3) addition on microwave dielectric properties of Li_(2)ZnTi_(3)O_(8) ceramics

作　　者：董清臣[1] 刘昆磊[1] 于仕辉 刘献省[3] 张伟风[3] DONG Qingchen;LIU Kunlei;YU Shihui;LIU Xiansheng;ZHANG Weifeng(School of Automation and Information Engineering,Pingdingshan Polytechnic College,Pingdingshan 467000,China;School of Microelectronics,Tianjin University,Tianjin 300072,China;Henan Key Laboratory of Photovoltaic Materials,Henan University,Kaifeng 475004,China)

机构地区：[1]平顶山工业职业技术学院自动化与信息工程学院,平顶山467000 [2]天津大学微电子学院,天津300072 [3]河南大学光伏材料省重点实验室,开封475004

出　　处：《粉末冶金材料科学与工程》2023年第1期28-34,共7页Materials Science and Engineering of Powder Metallurgy

基　　金：国家自然科学基金资助项目(11974099);河南省科技攻关项目(212102210277)。

摘　　要：采用固相反应法合成Li_(2)ZnTi_(3)O_(8),然后添加Al_(2)O_(3)(添加量为Li_(2)ZnTi_(3)O_(8)质量的0~7%)制备Al_(2)O_(3)/Li_(2)ZnTi_(3)O_(8)复合微波介电陶瓷,研究Al_(2)O_(3)添加量对复合陶瓷微观结构与介电性能的影响。结果表明,复合陶瓷主相为立方结构Li_(2)ZnTi_(3)O_(8),随Al_(2)O_(3)添加量增加,逐渐生成ZnAl_(2)O_(4)和TiO2第二相,这2种物质对陶瓷的微波介电性能有很大影响。Al_(2)O_(3)的添加可抑制Li_(2)ZnTi_(3)O_(8)晶粒的生长。烧结温度为1100℃、Al_(2)O_(3)添加量为1%时,Al_(2)O_(3)/Li_(2)ZnTi_(3)O_(8)复合微波介电陶瓷获得最佳介电性能,介电常数εr≈26.1,Q×f≈87900GHz,谐振频率温度系数τf≈13.3×10^(-6)℃^(-1)。Li_(2)ZnTi_(3)O_(8)was synthesized by solid-state reaction.The microwave dielectric ceramics composed of Li_(2)ZnTi_(3)O_(8)and Al_(2)O_(3)were prepared(The Al_(2)O_(3)mass is 0-7%of Li_(2)ZnTi_(3)O_(8)mass).The effects of Al_(2)O_(3)addition amount on the microstructures and dielectric properties of the samples were investigated.The results show that the primary phase of the composite ceramics is cubic structure Li_(2)ZnTi_(3)O_(8).ZnAl_(2)O_(4)and TiO2phases are observed with the increase of Al_(2)O_(3)addition amount,which have a great influence on the microwave dielectric properties of the ceramic samples.The addition of Al_(2)O_(3)can inhibit the growth of Li_(2)ZnTi_(3)O_(8)grains.When the sintering temperature is 1100℃and the Al_(2)O_(3)addition is 1%,the microwave dielectric ceramics composed of Li_(2)ZnTi_(3)O_(8)and Al_(2)O_(3)obtain the best dielectric properties:εr≈26.1,Q×f≈87900 GHz,τf≈13.3×10^(-6)℃^(-1).

关 键 词：微波介电陶瓷 Li_(2)ZnTi_(3)O_(8) Al_(2)O_(3) 添加量 介电性能 

分 类 号：TM28[一般工业技术—材料科学与工程]