电子元件与材料2025，Vol.44Issue(3)：244-250,7.DOI:10.14106/j.cnki.1001-2028.2025.1256
(Sr0.25Ca0.75)TiO3掺杂(Zn0.05Mg0.95)2(Sn0.05Ti0.95)O4微波介电陶瓷及其在带通滤波器中的应用
(Sr0.25Ca0.75)TiO3-doped(Zn0.05Mg0.95)2(Sn0.05Ti0.95)O4 microwave dielectric ceramics and their application in bandpass filters
摘要
Abstract
(Sr0.25Ca0.75)TiO3-doped(Zn0.05Mg0.95)2(Sn0.05Ti0.95)O4 microwave dielectric ceramics were prepared by the solid-state method.The fundamental physics and microwave dielectric properties were measured using XRD,drainage,SEM,EDS and network analyzer.The samples with optimal dielectric properties were screened to explore their practical application in microwave bandpass filters.The results show that all samples are composed of(Sr0.25Ca0.75)TiO3 phase with smaller grains and(Zn0.05Mg0.95)2(Sn0.05Ti0.95)O4 main phase with larger grains.The highest density was obtained for the samples at the(Sr0.25Ca0.75)TiO3 doping concentration of x=0.09 and sintering temperature of 1325 ℃.The microwave dielectric properties results show the τf is nearly zero(about-1.81×10-6/℃)at the optimal(Sr0.25Ca0.75)TiO3 doping concentration of x=0.09 and sintering temperature of 1325 ℃,which have εr and Q×f of about 18.68 and 147890 GHz,respectively.When the same filter circuit design was applied and compared to the FR-4 and Al2O3 substrate,the filter using 0.09SCT-0.91ZMST substrate has the largest absolute reflection loss of 25.91 dB and the smallest absolute penetration loss of 1.15 dB,which expands the bandwidth by 11.6％and reduces the size by nearly 25％.The results show that the performance of the 0.09SCT-0.91ZMST-based filter is the best among the three substrate materials,which makes it the most competitive in practical applications.关键词
微波介电陶瓷/(Zn0.05Mg0.95)2(Sn0.05Ti0.95)O4/(Sr0.25Ca0.75)TiO3掺杂/微波介电性能/带通滤波器Key words
microwave dielectric ceramics/(Zn0.05Mg0.95)2(Sn0.05Ti0.95)O4/(Sr0.25Ca0.75)TiO3/microwave dielectric properties/bandpass filter分类
化学工程引用本文复制引用
杜晶,娄本浊,蔡志鹏,黄文登,何梦慈..(Sr0.25Ca0.75)TiO3掺杂(Zn0.05Mg0.95)2(Sn0.05Ti0.95)O4微波介电陶瓷及其在带通滤波器中的应用[J].电子元件与材料,2025,44(3):244-250,7.基金项目
陕西省自然科学基础研究计划(2023-JC-QN-0077) （2023-JC-QN-0077）
