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Effect of Al2O3 on the morphological and gas sensing properties of SnO2 pellets | IEEE Conference Publication | IEEE Xplore

Effect of Al2O3 on the morphological and gas sensing properties of SnO2 pellets


Abstract:

Alumina mixed tin oxide (SnO2: Al2O3) powders were obtained by employing chemical and physical synthesis methods. The powders were prepared from tin chloride as Sn source...Show More

Abstract:

Alumina mixed tin oxide (SnO2: Al2O3) powders were obtained by employing chemical and physical synthesis methods. The powders were prepared from tin chloride as Sn source, urea (R1) and ammonia (R2) as precipitant agents. The resultant SnO2 powders are milled in a planetary ball mill. Finally, Al2O3 was added to the milled SnO2 powders manually in different ratios, and then pressed to manufacture thin pellets. After several experimental trials, stable SnO2: Al2O3 pellets were formed. Later, silver contacts were manufactured on the pellets surface by the thermal evaporation technique. The effect of Al2O3 ratio and precipitation agent on the morphological properties are presented in this work. The morphological study was developed by using Scanning Electron Microscopy (SEM). Additionally, the sensing properties of these pellets as a function of the SnO2: Al2O3 ratio were measured in carbon monoxide (CO) atmosphere and a hypothesis model for an arrangement of SnO2 and Al2O3 particles on the pellets surface for different mixing ratios is proposed.
Date of Conference: 26-30 September 2016
Date Added to IEEE Xplore: 24 November 2016
ISBN Information:
Conference Location: Mexico City, Mexico

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