Thermoanalytical studies of zinc citrate, bismuth citrate and calcium citrate
1987; Elsevier BV; Volume: 117; Linguagem: Inglês
10.1016/0040-6031(87)88115-7
ISSN1872-762X
AutoresKrishna Srivastava, V.G. Gunjikar, Amitabha Sinha,
Tópico(s)Chemical Thermodynamics and Molecular Structure
ResumoAbstract Thermal decomposition behaviour of the citrates of zinc, bismuth and calcium has been investigated individually and as binary mixtures (1:1) consisting of zinc citrate as the essential component. Zinc citrate is found to decompose to zinc oxide at 400 ° C, bismuth citrate decomposes to α-Bi 2 O 3 at 360 ° C and calcium citrate decomposes to calcium oxide at 1150°C. The barium and calcium oxides which are normally formed at a higher temperature during the individual decomposition of the citrates are obtained at lower temperatures, i.e. 1140 and 800 °C, respectively, on decomposition of their mixtures with zinc citrate. Bismuth citrate alone is found to decompose to α-Bi 2 O 3 whereas its mixture with zinc citrate decomposes to the β-phase of bismuth oxide.
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