摘要
采用反应烧结法制备Li_(3)Mg_(2)SbO_(5)F_(2)微波介质陶瓷,并研究烧结温度等条件对其相组成、显微组织和微波介电性能的影响。采用X射线衍射仪、扫描电子显微镜和矢量网络分析仪对所制备Li_(3)Mg_(2)SbO_(5)F_(2)微波介质陶瓷的结构和微波介电性能进行表征。实验结果表明,825℃烧结的Li_(3)Mg_(2)SbO_(5)F_(2)陶瓷发生了部分立方-正交结构相变。Li_(3)Mg_(2)SbO_(5)F_(2)陶瓷的介电常数主要受体密度的影响,而其品质因数受密度和结构相变共同影响。800℃/5 h烧结的Li_(3)Mg_(2)SbO_(5)F_(2)陶瓷具有良好微波介电性能,其介电常数为7.9,品质因数为58 600 GHz,谐振频率温度系数为-53 ppm/℃。
The Li_(3)Mg_(2)SbO_(5)F_(2) ceramics are prepared via reactive sintering method,and the effects of sintering temperatures on the phase composition,the microstructure and the microwave dielectric properties are studied.The structure and the microwave dielectric properties of the prepared Li_(3)Mg_(2)SbO_(5)F_(2) ceramics are characterized by an X-ray diffraction,a scanning electronic microscopy,and a vector network analyzer.Experiment results indicates that partial cubic phases transformed to orthogonal phases for Li_(3)Mg_(2)SbO_(5)F_(2) ceramic sintered at 825℃.Its permittivity is mainly affected by the bulk density,whereas its quality factor is determined by the combined effects of bulk density and crystal structure.The 800℃/5 h sintered Li_(3)Mg_(2)SbO_(5)F_(2) ceramic shows optimum microwave dielectric properties,a permittivity of 7.9,a quality factor of 58600 GHz,and a temperature coefficient of resonant frequency of-53 ppm/℃.
作者
姚国光
陈苗
刘红凯
芦雅
丁前
吴彭珅
YAO Guoguang;CHEN Miao;LIU Hongkai;LU Ya;DING Qian;WU Pengshen(School of Electronic Engineering,Xi’an University of Posts and Telecommunications,Xi’an 710121,China)
出处
《西安邮电大学学报》
2023年第3期52-56,共5页
Journal of Xi’an University of Posts and Telecommunications
基金
陕西省自然科学基金项目(2021JM-758)
西安邮电大学研究生创新基金项目(CXJJYL2021051)
陕西省大学生创新创业训练计划项目(202211664020)。
