BaBiO3-doped SrTiO3-based NTC thermistors

SrTiO3-based materials doped with BaBiO3 only show negative temperature coefficient effect over a wide temperature range. X-ray diffraction analysis displays that major phases present in the sintered bodies were the SrTiO3 compounds with a cubic structure and the BaBiO3 compounds with a monoclinal structure. SEM and EDS were employed to investigate the microstructure and distribution of BaBiO3 in the samples. The values of rho(25) and B-25/85 constants of thermistors decreased with an increase in BaBiO3 content. (c) 2006 Elsevier B.V. All rights reserved.