Authors:
I. UzunovInstitute of General and Inorganic Chemistry, Bulg. Acad. of Sciences, 1040 Sofia, Bulgaria

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D. KlissurskiInstitute of General and Inorganic Chemistry, Bulg. Acad. of Sciences, 1040 Sofia, Bulgaria

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L. TeocharovInstitute of General and Inorganic Chemistry, Bulg. Acad. of Sciences, 1040 Sofia, Bulgaria

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Abstract  

The thermal decomposition of copper sulphate hydroxide hydrate, (CuO·CuSO4). 2Cu(OH)2·H2O, to copper oxysulphate and CuO was investigated by X-ray phase analysis, IR spectroscopy, complex thermal analysis and electron microscopy. The effect of water vapour and time of treatment on the formation of decomposition products with a large surface area is studied. The strong decrease in specific surface area of the precipitate (from 80 m2/g to 20 m2/g) thermally treated at a temperature above 250°C is associated with the elimination of water having a coordination bond with the Cu2+ ion. During this process, the interplanar distances of the crystal lattice of copper sulphate hydroxide hydrate decrease. The time of decomposition of this compound essentially affects the decrease of the specific surface area. When the decomposition proceeds in an atmosphere containing water vapour sintering processes are predominating and the phase obtained has a considerably smaller specific surface area than in cases of decomposition under dry air.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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Author:
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