Electrical properties of Y-and Mn-doped BaTiO3-based PTC ceramics

• Published in: Ceramics international Vol. 34; no. 8; pp. 2007 - 2010
• Main Authors: DING, S. W, JIA, G, WANG, J, HE, Z. Y
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Science 01-12-2008
• Subjects: Applied sciences; Building materials. Ceramics. Glasses; Ceramic industries; Chemical industry and chemicals; Electrotechnical and electronic ceramics; Exact sciences and technology; Technical ceramics; Addition; Calcium; Electrical properties; Property composition relationship; Yttrium addition; Doping; Titanates; Experimental study; Solid solution; X ray diffraction; Oxide ceramics; Transmission electron microscopy; Impurity effect; Sintering; Solid state reaction; Manganese addition; Barium Titanates; Manufacturing; Ceramic nanomaterials; Strontium addition; Codoping; Manganites; Low temperature; Electroceramics
• ISSN: 0272-8842; 1873-3956
• DOI: 10.1016/j.ceramint.2007.07.023

A series of nano-Ba0.85-xYxSr0.07Ca0.08MnyTi1-yO3 (x = 0.7-1.2%, y = 0-0.06%) solid solutions were synthesised by a solid-state reaction at low temperature. Doping different content Y and Mn showed that the room-temperature resistance decreased by doping Y, and the resistance jump increased dramatically by doping Mn. The optimum donor level increased significantly with increasing acceptor level. The room-temperature resistance changed as a U-type curve with increasing Mn additive concentration while the resistance jump was reversed. The influence of sintering temperature and soaking time on the properties of PTC materials is discussed. 18 refs.