Low‐Temperature Sintering and Microwave Dielectric Properties of (Mg0.95Zn0.05)2(Ti0.8Sn0.2)O4–(Ca0.8Sr0.2)TiO3 Composite Ceramics
Low‐Temperature Sintering and Microwave Dielectric Properties of (Mg0.95Zn0.05)2(Ti0.8Sn0.2)O4–(Ca0.8Sr0.2)TiO3 Composite Ceramics
复制标题
DOI：
10.1111/jace.12432
复制
发表时间：
2013-10
影响因子：
3.9
通讯作者：
G. Yao;Peng Liu;Huaiwu Zhang
中科院分区：
文献类型：
--
作者：
G. Yao;Peng Liu;Huaiwu Zhang
采用常规固相路线制备了0.9(Mg0.95Zn0.05)2(Ti0.8Sn0.2)O4–0.1(Ca0.8Sr0.2)TiO3 (MZTS–CST)陶瓷。在 1325°C 下烧结的 MZTS-CST 陶瓷表现出 er = 18.2、Q × f = 49 120 GHz（8.1 GHz 时）和 τf = 15 ppm/°C。研究了 LiF-Fe2O3-V2O5 (LFV) 添加对 MZTS-CST 的可烧结性、相组成、微观结构和微波介电性能的影响。共晶液相0.12CaF2/0.28MgF2/0.6LiF和MgV2O6的发展，将MZTS-CST陶瓷的烧结温度从1325℃降低到950℃。 X射线粉末衍射（XRPD）和能量色散光谱（EDS）分析表明，MZTS和CST共存于烧结陶瓷中。第二相Ca5Mg4(VO4)6以及残余液相影响MZTS-CST复合陶瓷的微波介电性能。通常，在 950°C 下烧结的 MZTS–CST–5.3LFV 复合陶瓷表现出优异的微波介电性能：er = 16.3，Q × f = 30 790 GHz（8.3 GHz 时），τf = −10 ppm/°C。
0.9(Mg0.95Zn0.05)2(Ti0.8Sn0.2)O4–0.1(Ca0.8Sr0.2)TiO3 (MZTS–CST) ceramics were prepared by a conventional solid-state route. The MZTS–CST ceramics sintered at 1325°C exhibited er = 18.2, Q × f = 49 120 GHz (at 8.1 GHz), and τf = 15 ppm/°C. The effects of LiF–Fe2O3–V2O5 (LFV) addition on the sinterability, phase composition, microstructure, and microwave dielectric properties of MZTS–CST were investigated. Eutectic liquid phases 0.12CaF2/0.28MgF2/0.6LiF and MgV2O6 were developed, which lowered the sintering temperature of MZTS–CST ceramics from 1325°C to 950°C. X-ray powder diffraction (XRPD) and energy dispersive spectroscopy (EDS) analysis revealed that MZTS and CST coexisted in the sintered ceramics. Secondary phase Ca5Mg4(VO4)6 as well as residual liquid phase affected the microwave dielectric properties of MZTS–CST composite ceramics. Typically, the MZTS–CST–5.3LFV composite ceramics sintered at 950°C showed excellent microwave dielectric properties: er = 16.3, Q × f = 30 790 GHz (at 8.3 GHz), and τf = −10 ppm/°C.