A new low-loss dielectric material ZnZrTa2O8 for microwave devices. Issue 3 (February 2016)

• Record Type: Journal Article
• Authors: Lyu, Xiaosong; Li, Lingxia; Zhang, Shuai; Sun, Hao; Li, Sai; Ye, Jing; Zhang, Bowen; Li, Jiangteng
• Is Part Of: Journal of the European Ceramic Society. Volume 36:Issue 3(2016)
• Page Start: 931
• Page End: 935
• Publication Date: 2016-02
• Subjects: Ceramics -- Low loss -- Dielectric properties -- Tantalates; 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.2015.11.015
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: The first characterization of the microwave dielectric properties of ZnZrTa2 O8 ceramic is presented. Single phase ZnZrTa2 O8 ceramics with wolframite structure were prepared by a conventional mixed-oxide route and sintered in the temperature range of 1280–1360 °C. The microstructures and microwave dielectric properties were investigated systematically. The variation trend of ε r was in accordance with that of relative density and molecular volume. The Q × f value was mainly depended on the atomic packing fraction. The τf was found to be correlated with the variation of bond valence of the A- and B-site cations. The ZnZrTa2 O8 ceramic sintered at 1320 °C for 6 h exhibited excellent microwave dielectric properties of ε r ∼ 32, Q × f ∼ 110, 700 GHz, and τf ∼ −32 ppm/°C. This constitutes a very promising material for microwave applications.