摘要
为了提高MgTiO_(3)-(Ca_(0.8)Sr_(0.2))TiO_(3)(MT-CST)微波介质陶瓷的品质因数,通过SEM、XRD、拉曼光谱仪与XPS分析手段,研究了Ce掺杂对MT-CST陶瓷成分晶体结构和微波介电性能的影响.结果表明:高价Ce^(3+)取代Mg^(2+)可使氧空位缺陷得到有效抑制,从而降低了微波介质损耗,可使品质因数得到较大提升.制备的陶瓷具有优异的微波介电性能:介电常数为20.8,品质因数为61000 GHz,谐振频率温度系数为-4.99×10^(-6)/℃.
In order to improve the quality factor value of MgTiO_(3)-(Ca_(0.8)Sr_(0.2))TiO_(3)(MT-CST)microwave dielectric ceramics,the effects of Ce doping on the composition,crystal structure and microwave dielectric properties of MT-CST ceramics were investigated by SEM,XRD,Raman spectrometer and XPS analysis methods.The results reveal that the replacement of Mg^(2+)by high valence Ce 3+effectively inhibits the formation of oxygen vacancy and consequently decreases microwave dielectric loss,resulting in the great enhancement of quality factor value.The MCeT-CST ceramics have good dielectric properties with dielectric constant of 20.8,quality factor of 61000 GHz and temperature coefficient of-4.99×10^(-6)/℃at resonance frequency.
作者
张帆
石桐
李金睿
王新
杨云洪
ZHANG Fan;SHI Tong;LI Jin-rui;WANG Xin;YANG Yun-hong(School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,China;Research Institute of Magnesite Chemical Industry,Yingkou Magnesite Chemical Group Co.Ltd.,Yingkou 115110,China)
出处
《沈阳工业大学学报》
CAS
北大核心
2023年第4期411-417,共7页
Journal of Shenyang University of Technology
基金
辽宁省自然科学基金区域创新联合基金项目(2020-YKLH-23).
作者简介
张帆(1973-),女,辽宁凌海人,副教授,博士,主要从事微波介质陶瓷等方面的研究.
