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A Novel Temperature Stable Microwave Dielectric Ceramic with Garnet Structure: Sr 2 NaMg 2 V 3 O 12
Author(s) -
Xiang Huaicheng,
Fang Liang,
Jiang Xuewen,
Tang Ying,
Li Chunchun
Publication year - 2016
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.14034
Subject(s) - ceramic , materials science , analytical chemistry (journal) , dielectric , relative permittivity , relative density , sintering , permittivity , microwave , mineralogy , microstructure , vanadate , solid state reaction route , atmospheric temperature range , metallurgy , chemistry , physics , optoelectronics , chromatography , quantum mechanics , meteorology
A garnet vanadate ceramic Sr 2 NaMg 2 V 3 O 12 was prepared by the conventional solid‐state route, and the sinterability, microwave dielectric properties, and its chemical compatibility with Ag electrodes were investigated. Sr 2 NaMg 2 V 3 O 12 sample could be well sintered at 900°C for 4 h with a relative density of 96.1%. X‐ray diffraction data showed that Sr 2 NaMg 2 V 3 O 12 ceramics crystallized into a cubic garnet structure with a space group Ia‐3d over the sintering temperature range (830°C–930°C). The Sr 2 NaMg 2 V 3 O 12 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 Sr 2 NaMg 2 V 3 O 12 ceramics and Ag electrodes.