Preparation of Perovskite-Type Sr1-xBaxPbO3 Ceramics by an Oxalate Coprecipitation Method and the Thermoelectric Properties
Year: 2008
Type: article
Abstract: An oxalate coprecipitation method was applied to prepare dense ceramics of perovskite-type Sr1-xBaxPbO3 solid solutions with x = 0.0∼0.5, and the electrical conductivity and Seebeck coefficient were measured at high temperatures to estimate the thermoelectric power factors. Sr-Ba-Pb oxalates were coprecipitated from starting nitrate solutions with molar ratios of metallic ions controlled to Pb/Sr1-xBax = 1.05 and calcined at 700°C to obtain fine oxide powders. The small amount of PbO particles, which were dispersed well in the calcined powders composed mainly of SrPbO3 and BaPbO3, formed liquid phase during the sintering and led to the formation of the dense Sr1-xBaxPbO3 ceramics. The thermoelectric power factors of the Sr1-xBaxPbO3 ceramics with x = 0.0∼0.5 were estimated to be 1.0×10−4∼3.6×10−4 Wm−1K−2 in the temperature range 373∼1073 K and the value was maximized for the Sr0.7Ba0.3PbO3 ceramic. This study suggests that the present oxalate coprecipitation method is a simple and useful way to prepare dense Sr1-xBaxPbO3 ceramics showing comparatively high thermoelectric power factors.
DOI: 10.2497/jjspm.55.408
Authors: Masahiro Yasukawa, Toshio Kono
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W1976454507