Influence of partial cobalt-ion substitution on the microstructure and dielectric properties of (Zn0.7Mg0.3)(1-x)CoxTiO3 ceramics
Influence of partial cobalt-ion substitution on the microstructure and dielectric properties of (Zn0.7Mg0.3)(1-x)CoxTiO3 ceramics
复制标题
部分钴离子取代对(Zn0.7Mg0.3)(1-x)CoxTiO3陶瓷微观结构和介电性能的影响
DOI：
10.1016/j.ceramint.2018.04.140
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发表时间：
2018
影响因子：
5.2
通讯作者：
Li Yuanxun
中科院分区：
文献类型：
--
作者：
Xie Xiaodong;Tang Xiaoli;Jing Yulan;Zhang Huaiwu;Su Hua;Li Yuanxun
本文采用Co离子掺杂的方法对（Zn0.7Mg0.3）1-xCoxTiO 3陶瓷进行了改性，以改善陶瓷的显微结构和微波介电性能。(Zn采用传统的固相法制备了（0.7Mg0.3）1-xCoxTiO 3陶瓷，并以Li 2 O：B 2 O3：SiO2：CaO：Al 2 O3（LBSCA）玻璃为烧结助剂，将烧结温度降低到900° C。X射线衍射分析表明，（Zn，Mg，Co）TiO 3为主要晶相。扫描电子显微镜（SEM）结果表明，适量的Co离子取代促进了（Zn0.7Mg0.3）1-xCoxTiO 3体系晶粒的致密化和均匀化。当x= 0.075时，在900° C下烧结的样品与1 wt%的LBSCA玻璃形成了致密的微观结构，并表现出优异的微波介电性能，ε r= 21.602，Q× f= 80，040 GHz和τ f=− 70.24 ppm/° C。
In this study, cobalt-ion substitution was applied to improve the microstructure and microwave dielectric properties of (Zn 0.7 Mg 0.3) 1-x Co x TiO 3 ceramics.(Zn 0.7 Mg 0.3) 1-x Co x TiO 3 ceramics were obtained via the conventional solid-state route, and Li 2 O: B 2 O 3: SiO 2: CaO: Al 2 O 3 (LBSCA) glass was used as a sintering aid to decrease the sintering temperature to 900° C. X-ray diffraction analysis indicated that (Zn, Mg, Co) TiO 3 was the main crystalline phase. Scanning electron microscopy showed that proper cobalt-ion substitution promoted the densification and homogeneity of crystal grains in the (Zn 0.7 Mg 0.3) 1-x Co x TiO 3 system. At x= 0.075, the sample sintered at 900° C with 1 wt% LBSCA glass formed a dense microstructure and exhibited excellent microwave dielectric properties of ε r= 21.602, Q× f= 80,040 GHz and τ f=− 70.24 ppm/° C.