CaTiO_3对Mg_2B_2O_5微波介质陶瓷掺杂改性的研究

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英文篇名：Study on Doping Modification Properties of Mg_2B_2O_5 Microwave Dielectric Ceramics by CaTiO_3 Additives 作者：虞思敏 ; 周晓华 ; 孙成礼 ; 张树人 英文作者：YU Simin;ZHOU Xiaohua;SUN Chengli;ZHANG Shuren;State Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Science and Technology of China; 关键词：Mg2B2O5 ; CaTiO3 ; 微波陶瓷 ; 介电性能 ; 微观结构 英文关键词：Mg2B2O5;;CaTiO3;;microwave ceramics;;dielectric property;;micro structure 中文刊名：YDSG 英文刊名：Piezoelectrics & Acoustooptics 机构：电子科技大学电子薄膜与集成器件国家重点实验室; 出版日期：2019-02-15 出版单位：压电与声光 年：2019 期：v.41;No.244 基金：国家自然科学基金资助项目(51672038) 语种：中文; 页：YDSG201901019 页数：4 CN：01 ISSN：50-1091/TN 分类号：70-73

摘要

采用传统固相反应法制备CaTiO_3掺杂Mg2B2O5微波介电陶瓷。使用X线衍射仪(XRD)、扫描电子显微镜(SEM)和微波介电性能测试等手段,研究了CaTiO_3掺杂对样品微观结构和微波介电性能的影响。结果表明,Mg_2B_2O_5相和CaTiO_3相二者能够共存,随着CaTiO_3掺杂量的增加介电常数和谐振频率温度系数会增大,而品质因数会有所下降。当CaTiO_3的质量分数为5%时,样品在1 085℃烧结4h后获得了最佳微波介电性能,即介电常数εr=7.03,品质因数Q×f=42 221GHz,谐振频率温度系数τf=-2.8×10~(-6)℃-1。
        The CaTiO_3 doping Mg_2B_2O_5 microwave dielectric ceramics were synthesized by the traditional solidstate reaction method.The effects of CaTiO_3 doping on the microwave dielectric properties and micro structure of the samples were studied using XRD,SEM and microwave dielectric properties measurements.The results show that the Mg_2B_2O_5 and CaTiO_3 phases can coexist,and the dielectric constant and the temperature coefficient of resonant increase with the increase of the content of CaTiO_3 while the quality factor slightly decreases.When the mass fraction of Mg_2B_2O_5 is 5%,the CaTiO_3 ceramics sample sintered at 1 085℃ for 4h shows optimal properties,that is,εr=7.03,Q×f=42 221 GHz,τf=-2.8×10~(-6)℃-1.

引文

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