Microwave dielectric properties for Ba(Mg1/3Ta2/3)O3-A(Mg1/2W1/2)O3 (A=Ba, Sr, and Ca) ceramics

For a high-Q dielectric resonator at microwave frequencies, complex perovskite-structured Ba(Mg1/3Ta2/3)O3A(Mg1/2W1/2)O3 (A=Ba, Sr, and Ca) ceramics have been developed. A(Mg1/2W1/2)O3 effects on the crystal structure, microstructure, and microwave characteristic of Ba(Mg1/3Ta2/3)O3 (BMT) were inves...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1994, Vol.33 (9B), p.5482-5487
Main Authors: FURUYA, M, OCHI, A
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Dielectric properties of solids and liquids
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Equations of state, phase equilibria, and phase transitions
Exact sciences and technology
Other topics in equations of state, phase equilibria, and phase transitions
Permittivity (dielectric function)
Physics
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Summary:For a high-Q dielectric resonator at microwave frequencies, complex perovskite-structured Ba(Mg1/3Ta2/3)O3A(Mg1/2W1/2)O3 (A=Ba, Sr, and Ca) ceramics have been developed. A(Mg1/2W1/2)O3 effects on the crystal structure, microstructure, and microwave characteristic of Ba(Mg1/3Ta2/3)O3 (BMT) were investigated. Ba(Mg1 /2W1/2)O3 (BMW) decreased the temperature coefficient of resonant frequency (TCF) for BMT. Sr(Mg1/2W1/2)O3 (SMW) and Ca(Mg1/2W1/2)O3 (CMW) increased it. Zero TCF was obtained for the BMT/BMW = 95/5 composition. With 0.5 mol percent BMW content, dielectric loss quality, Qd, reached a maximum (40000 at 10 GHz). (Author)
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.33.5482