Novel Series of Low‐Firing Microwave Dielectric Ceramics:   Ca   5   A   4 ( VO  4 ) 6  (  A   2+  =   Mg  ,   Zn  ) | Zendy

Yao Guoguang | Zendy; Liu Peng | Zendy; Zhang Huaiwu | Zendy

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Novel Series of Low‐Firing Microwave Dielectric Ceramics: Ca 5 A 4 ( VO 4 ) 6 ( A 2+ = Mg , Zn )

Author(s) -

Yao Guoguang,

Liu Peng,

Zhang Huaiwu

Publication year - 2013

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.12359

Subject(s) - ceramic , dielectric , microwave , analytical chemistry (journal) , materials science , mineralogy , phase (matter) , x ray crystallography , diffraction , chemistry , metallurgy , optics , physics , optoelectronics , organic chemistry , chromatography , quantum mechanics

Using a conventional solid‐state reaction Ca 5 A 4 ( VO 4 ) 6 (A 2+ = Mg , Zn ) ceramics were prepared and their microwave dielectric properties were investigated for the first time. X ‐ray diffraction revealed the formation of pure‐phase ceramics with a cubic garnet structure for both samples. Two promising ceramics Ca 5 Zn 4 ( VO 4 ) 6 and Ca 5 Mg 4 ( VO 4 ) 6 sintered at 725°C and 800°C were found to possess good microwave dielectric properties: ε r = 11.7 and 9.2, Q × f = 49 400 GHz (at 9.7 GHz) and 53 300 GHz (at 10.6 GHz), and τ f = −83 and −50 ppm/°C, respectively.

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