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THERMOLYSIS FEATURES OF OCTACALCIUM PHOSPHATE
https://doi.org/10.17073/1683-4518-2013-10-52-56
Abstract
Octacalcium phosphate (OCP) was synthesized by means of brushite СаНРО4·2Н2О hydrolysis in the acetate buffer solution at 60 °C and pH = 5,75. Thermolysis of OCP was carried out within 200‒700 °С. The initial OCP and the powders obtained were investigated by means of infrared spectroscopy and electron microscopy methods as well as by X-Ray phase analysis. The thermolysis of OCP obtained by the stated method takes place at higher temperature than that of OCP cited in the list of references. It was shown for the first time in this article that the main feature of the OCP thermolysis is the intermediate apatite-like phase forming, this phase comprising besides the ortophosphate and hydroxide ions also pyrophosphate anions. The crystals of this intermediate phase save completely the lamellar structure of the initial OCP. Ill. 4. Ref. 6.
About the Authors
V. I. PutlyaevRussian Federation
E. V. Kukueva
Russian Federation
T. V. Safronova
Russian Federation
V. K. Ivanov
Russian Federation
B. R. Churagulov
Russian Federation
References
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Supplementary files
For citation: Putlyaev V.I., Kukueva E.V., Safronova T.V., Ivanov V.K., Churagulov B.R. THERMOLYSIS FEATURES OF OCTACALCIUM PHOSPHATE. NOVYE OGNEUPORY (NEW REFRACTORIES). 2013;(10):52-56. https://doi.org/10.17073/1683-4518-2013-10-52-56
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