A Novel Temperature Stable Microwave Dielectric Ceramic with Garnet Structure: Sr2NaMg2V3O12. Issue 2 (21st December 2015)

• Record Type: Journal Article
• Authors: Xiang, Huaicheng; Fang, Liang; Jiang, Xuewen; Tang, Ying; Li, Chunchun
• Is Part Of: Journal of the American Ceramic Society. Volume 99:Issue 2(2016)
• Page Start: 399
• Page End: 401
• Publication Date: 2015-12-21
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.14034
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract : A garnet vanadate ceramic Sr2 NaMg2 V3 O12 was prepared by the conventional solid‐state route, and the sinterability, microwave dielectric properties, and its chemical compatibility with Ag electrodes were investigated. Sr2 NaMg2 V3 O12 sample could be well sintered at 900°C for 4 h with a relative density of 96.1%. X‐ray diffraction data showed that Sr2 NaMg2 V3 O12 ceramics crystallized into a cubic garnet structure with a space group Ia‐3d over the sintering temperature range (830°C–930°C). The Sr2 NaMg2 V3 O12 ceramic sintered at 900°C obtained the optimum microwave dielectric properties with a relative permittivity of 11.7, a Q×f of 37 950 GHz (at 11.0 GHz), and a almost zero τ f value of −2.9 ppm/°C. Chemical compatibility experiments showed no reaction between Sr2 NaMg2 V3 O12 ceramics and Ag electrodes.