Low temperature sintering of PMN ceramics by doping with SrO

• Published in: Materials letters Vol. 49; no. 6; pp. 345 - 351
• Main Authors: Yang, Yi, Feng, Chude, Yu, Youhua
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 2001; Elsevier
• Subjects: Applied sciences; Building materials. Ceramics. Glasses; Ceramic industries; Chemical industry and chemicals; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Dielectric; Dielectric properties of solids and liquids; Dielectric, piezoelectric, ferroelectric and antiferroelectric materials; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Doping; Electrotechnical and electronic ceramics; Exact sciences and technology; Low temperature sintering; Multilayer capacitor; Niobates, titanates, tantalates, pzt ceramics, etc; Pb(Mg 1/3Nb 2/3)O 3; Permittivity (dielectric function); Physics; Technical ceramics; Low temperature sintering; Pb(Mg 1/3Nb 2/3)O 3; Dielectric; Doping; Multilayer capacitor; Electrical properties; Dielectric properties; Ferroelectric ceramics; Multiple layer; Niobates; Experimental study; Oxide ceramics; Dielectric ceramics; Additive; Lead Oxides; Niobium Oxides; Sintering; Manufacturing; Microstructure; Strontium Oxides; Capacitor; Magnesium Oxides; Low temperature; Electroceramics
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/S0167-577X(00)00397-9

Low temperature sintering of lead magnesium niobate (PMN) has been studied. The sintering temperature of PMN ceramics could be reduced from about 1200°C to about 800–900°C by addition of a small amount of SrO. Dense composite ceramics PMN– xSr ( x=0, 0.01, 0.02 and 0.04) with fine grains were obtained. With the results of XRD and EMPA, the sintering mechanism, during which Sr 2+ substituted Pb 2+ at A site of ABO 3 and low-melting substance appeared, has been analyzed. Doping with SrO could reduce the size of crystal grain of PMN. The effects of SrO doping on dielectric properties have also been investigated. The maximum dielectric constant of PMN–0.02Sr sintered at 850°C was 12 000, and its loss tangent at room temperature was only 0.36%, which make it a very promising material for multilayer capacitors.