Crystal structure, mixture behavior, and microwave dielectric properties of novel temperature stable (1 − x)MgMoO4 − xTiO2 composite ceramics. Issue 15 (December 2017)

• Record Type: Journal Article
• Authors: Zheng, Haoran; Yu, Shihui; Li, Lingxia; Lyu, Xiaosong; Sun, Zheng; Chen, Siliang
• Is Part Of: Journal of the European Ceramic Society. Volume 37:Issue 15(2017)
• Page Start: 4661
• Page End: 4665
• Publication Date: 2017-12
• Subjects: Composite -- Microstructure -- Microwave dielectric properties -- Temperature stability; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2017.06.026
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Novel temperature stable MgMoO4 –TiO2 microwave dielectric ceramics were prepared by a solid state reaction process at low temperature (950 °C). As TiO2 content increases, the relative permittivity increases while the Q × f value decreases, and the variation mechanisms are proposed, respectively. The temperature coefficient of resonant frequency ( τf ) shifts to the positive direction as TiO2 is added. The mixture mechanisms of τf value for two-phase composite materials are supposed. A near-zero τf value (3.2 ppm/°C) is obtained when x = 0.3, with ε r = 9.13 ± 0.03 and Q × f = 11, 990 GHz. The 0.7MgMoO4 –0.3TiO2 composites are considered to be appropriate as a low temperature co-fired ceramic material for microwave wireless communication applications.