摘要
La 1-x Sr x CrO 3 -In 2 O 3 thick film thermocouples were fabricated by screen-printing method for high temperature sensing and the effects of Sr 2+ content were investigated systematically. All La 1-x Sr x CrO 3 thick films showed well crystallization with orthorhombic unit cell. Their average particle sizes showed the tendency of first increase then decrease gradually with the increase of Sr 2+ content, and the maximum of average particle size was 1.76 μm. At the same time, the conductivities were improved with the increase of Sr 2+ content. The thermoelectric properties of La 1-x Sr x CrO 3 depended on the Sr 2+ content and the average Seebeck coefficients had an exponential decay tendency with the increase of Sr 2+ content. For La 1-x Sr x CrO 3 (x = 0.1–0.4)-In 2 O 3 thermocouples, excellent repeatability and stability were observed through multi-cycles and long-time usage testing at high temperature. The La 0.7 Sr 0.3 CrO 3 -In 2 O 3 thick film thermocouple with excellent thermal stability (drift rate: 0.81 °C/h) and reliability makes it become a promising candidate high sensitivity thermal sensor .
危险品化学品经营许可证（带存储）