Thermal Decomposition of Copper(I) Thiocarbamide Chloride Hemihydrate |
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| Authors: | Krunks M Leskelä T Mannonen R Niinistö L |
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| Institution: | (1) Laboratory of Inorganic and Analytical Chemistry, Helsinki University of Technology, FIN-02015 Espoo;(2) Laboratory of Concrete Technology, Helsinki University of Technology, FIN-02015 Espoo, Finland;(3) Institute of Materials Technology, Tallinn Technical University, EE-0026 Tallinn, Estonia |
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| Abstract: | Two combinations of simultaneous thermoanalytical techniques (TG+DTA and TG+EGA) were used to study the thermal decomposition
of the title compound in order to gain a better insight into the spray pyrolytic processes leading to Cu2-xS and CuInS2 thin
films. After dehydration a complex sequence of reactions starts above 220°C leading through several intermediates to the formation
of CuO in air at 1000°C. In an inert atmosphere Cu2S is formed which in helium above 800°C partly decomposes to Cu. XRD and
FTIR were used to identify the intermediate solid phases which in air included CuCl, Cu2OSO4, Cu2OCl2 and CuSO4. EGA-FTIR
confirmed the complex reaction mechanism with NH3, HCl, H2O, COS, CO2 and some HCN as main gaseous products under oxidative
conditions.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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| Keywords: | copper thiocarbamide complex DTA EGA spray pyrolysis TG |
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