Heat treatment-induced phase transformations of materials in a system of calcium phosphates and magnesium phosphates with (Ca + Mg)/P = 2

We have studied the effect of heat treatment in a wide temperature range (from 300 to 1500°C) on the phase composition, heat effects and weight loss of powder materials in a system of calcium phosphates and magnesium phosphates with (Ca + Mg)/P = 2. The results demonstrate that crystalline magnesium...

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Bibliographic Details
Published in:Inorganic materials 2016-11, Vol.52 (11), p.1121-1125
Main Authors: Goldberg, M. A., Smirnov, V. V., Antonova, O. S., Shvorneva, L. I., Smirnov, S. V., Kutsev, S. V., Barinov, S. M.
Format: Article
Language:English
Subjects:
Apatite
Calcium
Calcium phosphate
Calcium phosphates
Chemistry
Chemistry and Materials Science
Composition effects
Crystal structure
Heat treatment
High temperature
High temperature effects
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Magnesium phosphate
Materials Science
Phase composition
Phase transitions
Recrystallization
Substitutes
Temperature effects
Tetracalcium phosphate
Weight loss
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Summary:We have studied the effect of heat treatment in a wide temperature range (from 300 to 1500°C) on the phase composition, heat effects and weight loss of powder materials in a system of calcium phosphates and magnesium phosphates with (Ca + Mg)/P = 2. The results demonstrate that crystalline magnesium-substituted whitlockite phases begin to form at temperatures above 600°C. Raising the heat treatment temperature reduces the degree of magnesium substitution for calcium in the structure of the magnesium-substituted whitlockite. Tetracalcium phosphate, a high-temperature phase, is formed through apatite phase recrystallization.
ISSN:0020-1685
1608-3172
DOI:10.1134/S0020168516110029