TG-DTA-MS of Indium Acetate.

1 January 1998

journal article
Published by The Mass Spectrometry Society of Japan in Journal of the Mass Spectrometry Society of Japan

Vol. 46 (4) , 292-295
https://doi.org/10.5702/massspec.46.292

Abstract

Indium acetate, a promising material for producing indium oxide films (Indium-Tin-Oxide transparent conductive films) by a dip coating, was synthesized and analyzed. The process of oxide formation in nitrogen and helium atmosphere was investigated by so-called TG-DTA-MS, i.e., thermogravimetry (TG) and differential thermal analysis (DTA) coupled with Evolved Gas Analysis (EGA) by mass spectrometry (MS) operated simultaneously. The thermal decomposition proceeded by gas evolution of water vapor and acetic acid followed by gas evolution of acetone and carbon dioxide at the higher temperature. The process in air atmosphere terminated at slightly earlier with an exothermic mass loss accompanying a rapid evolution of acetone, water vapor, and carbon dioxide; the evolved heat by combustion of acetone seemed to accelerate the thermal decomposition. The formula for indium acetate was estimated to be InOH (CH₃COO)₂ (basic acetate) by which the above reactions were explained satisfactorily.

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