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

• Published in: Japanese Journal of Applied Physics Vol. 33; no. 9B; pp. 5482 - 5487
• Main Authors: FURUYA, M, OCHI, A
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Tokyo Japanese journal of applied physics 1994
• 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; Temperature dependence; Cubic lattices; Frequency dependence; Inorganic compounds; Phase transformations; Microwave radiation; Transition element compounds; Tantalum oxides; Tungsten oxides; Ceramics; XRD; Lattice parameters; Calcium oxides; Strontium oxides; Multi-element compounds; Trigonal lattices; Barium oxides; Resonance frequency; Magnesium oxides; Capacitance; SEM; Microstructure; Permittivity
• ISSN: 0021-4922; 1347-4065
• DOI: 10.1143/JJAP.33.5482

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)