"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Gas sensing behavior of modified LaMnO3 ceramic

M. J. PAWAR1,*

Affiliation

  1. Department of Chemistry, Arts, Commerce and Science College, Amravati M.S. India 444606

Abstract

The preparation of LaMnO3 and La1-xSrxMnO3 (x in the range of 0.1-0.2) powders by polymerizable complex route and the synthesis of La0.8Sr0.2MnO3:Pd (1 wt. %) gas sensors by chemical wet method are described in some details. Thick films of all samples were measured for their sensitivities in the temperature range 100-350 oC against the reducing gases like CO, NH3, H2 and LPG. La0.8Sr0.2MnO3 has shown good sensitivity for CO gas at about 270 oC. Incorporation of palladium further improved the selectivity and sensitivity to CO gas by reduction of operating temperature from 270 oC to 200 oC. 1 wt.% Pd incorporated in La0.8Sr0.2MnO3 was able to detect up to 50 ppm CO in air at an operating temperature of 200 0C. The improved sensitivity of the perovskite compound is attributed to the finer and homogeneous powders obtained by adopting polymerizable complex route as well as incorporation of noble metal..

Keywords

LaMnO3, La1-xSrxMnO3, Polymerizable complex rout, Sensing properties.

Submitted at: Sept. 24, 2007
Accepted at: Dec. 7, 2007

Citation

M. J. PAWAR, Gas sensing behavior of modified LaMnO3 ceramic, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 12, pp. 3785-3789 (2007)