Effect of SrTiO3 concentration and sintering temperature on microstructure and dielectric constant of Ba1-xSrxTiO3

• Published in: Journal of the European Ceramic Society Vol. 24; no. 6; pp. 1045 - 1048
• Main Author: JEON, Jae-Ho
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Oxford Elsevier 2004
• Subjects: Applied sciences; Building materials. Ceramics. Glasses; Ceramic industries; Chemical industry and chemicals; Electrotechnical and electronic ceramics; Exact sciences and technology; Technical ceramics; Electrical properties; Property composition relationship; Dielectric properties; Temperature effect; Composition effect; Barium titanates; Experimental study; Solid solution; X ray diffraction; Oxide ceramics; Optical microscopy; Sintering; Strontium titanates; Manufacturing; Microstructure; Barium Strontium Titanates Mixed; Electroceramics
• ISSN: 0955-2219; 1873-619X
• DOI: 10.1016/s0955-2219(03)00385-6

The Ba1-xSrxTiO3 materials have received increased attention as one of the most important materials for electroceramic components, such as high dielectric ceramic capacitors, tunable phase shifters and PTCR. In this paper, the effect of SrTiO3 concentration and sintering temperature on the microstructure and dielectric constant of Ba1-xSrxTiO3 materials at the Curie temperature have been investigated. When Ba1-xSrxTiO3 materials were sintered at 1350NBDGC, the peak value of the dielectric constant, *emax, monotonically decreased with increasing SrTiO3 concentration. At the sintering temperature of 1400NBDGC the dielectric constant maximum at the TC increased with an increase in the x value, reaching the highest value at around x=0.4 and then decreased. As sintering temperature increased to 1450NBDGC, *emax increased with increasing SrTiO3 concentration up to x=0.6. The dielectric properties of Ba1-xSrxTiO3 materials were discussed in terms of SrTiO3 concentration and microstructure.