Microstructure of Ba(Mg1/3Ta2/3)O3-BaSnO3 microwave dielectrics

• Published in: Ceramics international Vol. 26; no. 1; pp. 57 - 62
• Main Authors: TIEN, L.-C, CHOU, C.-C, TSAI, D.-S
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Science 2000
• Subjects: Applied sciences; Building materials. Ceramics. Glasses; Ceramic industries; Chemical industry and chemicals; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Dielectric properties of solids and liquids; Dielectric, piezoelectric, ferroelectric and antiferroelectric materials; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Electrotechnical and electronic ceramics; Exact sciences and technology; Niobates, titanates, tantalates, pzt ceramics, etc; Permittivity (dielectric function); Physics; Technical ceramics; Electrical properties; Stannates; Transition metal Compounds; Dielectric properties; Experimental study; Oxide ceramics; Alkaline earth metal Compounds; Dielectric ceramics; Barium Oxides; Tin Oxides; Sintered material; Microstructure; Tantalum Oxides; Magnesium Oxides; Tantalates; Electroceramics; Crystalline structure
• ISSN: 0272-8842; 1873-3956
• DOI: 10.1016/S0272-8842(99)00019-X

Ceramics of Ba(Mg1/3Ta2/3)O3-BaSnO3 were synthesised by a two-stage calcination method. Microstructures were analysed using XRD, TEM, Raman spectroscopy, and SEM. The addition of BaSnO3 reduced the cation ordering of Ba(Mg1/3Ta2/3)O3 and its sinterability. Variations in ordered structure with BaSnO3 content were revealed by a reduction in intensity of the superlattice reflections, the domain size, the c/a ratio, and the shifting and broadening in Raman lines. The relations between microstructure and quality factors are discussed. 16 refs.