Ethanol and LPG sensing characteristics of SnO2 activated Cr2O3 thick film sensor

Bulletin of Materials Science

关键词: Gas sensor;    chromium oxide;    activation energy.;   

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The sensing response of pure and SnO2 activated Cr2O3 to ethanol vapours and liquefied petroleum gas (LPG) has been investigated. Fine particles of commercial chromium oxide powder were selected and deposited as thick film to act as a gas sensor. The sensor surface has been activated by tin dioxide, on surface oxidation of tin chloride. The concentration of tin chloride solution, used as activator, was varied from 0 to 5% and its effect on gas response, selectivity and operating temperature has been studied. It was found that response to ethanol vapours significantly improved, whereas response to LPG remained unaffected. Moreover, operating temperature remains unchanged both for LPG and ethanol vapours.

【 授权许可】

CC BY