Phase structure and the dielectric properties of the (Zn,Mg)2(Ti,Sn)O4 ceramics

• Published in: Journal of alloys and compounds 2014-10, Vol.610, p.544-548
• Main Authors: Liu, Xiangchun, Feng, Xueli, Zhou, Kaixuan, Yang, Yang, Zuo, Chenguang, Du, Huiling
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Dielectric ceramics; Dielectric properties; Dielectric properties of solids and liquids; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Exact sciences and technology; Permittivity (dielectric function); Phase structure; Physics; Spinel
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2014.05.091

•The substituting Mg2+ for Zn2+ forms (Zn(1−x),Mgx)2(Ti0.88, Sn0.12)O4 phase.•The solid solubility limit of Mg was situated at x=0.05–0.10.•The ceramics exhibits properties: εr=18.9, tanδ=5.5×10−4 and τε=2.89ppm/°C. (1−x)ZnO–xMgO–0.88TiO2–0.12SnO2 (x=0.05, 0.10, 0.15 and 0.20) ceramics were prepared by conventional mixed-oxide method. The phase structure, morphology and dielectric properties of the ceramics were investigated. The results show that Mg was incorporated into the phase of Zn2(Ti,Sn)O4 and the spinel-type solid solution (Zn(1−x),Mgx)2(Ti0.88,Sn0.12)O4 formed, the solid solubility limit of Mg was situated at x=0.05–0.10. The 0.95ZnO–0.05MgO–0.88TiO2–0.12SnO2 ceramics sintered at 1080°C exhibit dielectric properties εr=18.9, tanδ=5.5×10−4 and near zero temperature coefficient of dielectric constant (τε=2.89ppm/°C). Due to their stable dielectric property, the 0.95ZnO–0.05MgO–0.88TiO2–0.12SnO2 ceramics can serve as the promising high-frequency dielectric capacitor after further modification.