Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1475014 | Journal of the European Ceramic Society | 2010 | 5 Pages |
Abstract
BaTiO3–(Bi1/2K1/2)TiO3 (BT–BKT) ceramics have a low ρRT of 101–102 Ω cm like that of semiconducting materials prepared by sintering in a N2 flow with low O2 concentration. By annealing in air, the BT–BKT ceramics show an abrupt increase in their resistivity near the Tc, namely, a positive temperature coefficient of resistivity (PTC) characteristic. With 5 mol% and 10 mol% BKT added to BT, the ceramics display the PTC characteristic at 155 °C and 165 °C, respectively. Furthermore, the ratio, ρmax/ρRT, of the highest resistivity (ρmax) and the resistivity at room temperature (ρRT) of the ceramics increased on adding a small amount of Mn and a sintering aid.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
H. Takeda, H. Harinaka, T. Shiosaki, M.A. Zubair, C. Leach, R. Freer, T. Hoshina, T. Tsurumi,