Crystallization of phosphate glasses of the 0.62Na2O-1.28CaO-1.1MgO-3P2O5 system under ammonia atmosphere at 600°C

Glass-ceramics in the CaO- and MgO-P2O5 systems are of great interest as biomaterials. When heated in ammonia the glass transition and the crystallisation temperature are decreased compared with heating in air. After heating at 600 C for 72 h the sample indicated calcium pyrophosphate but after long...

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Bibliographic Details
Published in:Journal of materials science letters 1991, Vol.10 (11), p.625-627
Main Authors: KOWALCZYK, K, PALAVIT, G, VAST, P, BOUTIGNY, H, DELCOURT-DEBRUYNE, E
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Chemical industry and chemicals
Exact sciences and technology
Glass-ceramics
Glasses
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Summary:Glass-ceramics in the CaO- and MgO-P2O5 systems are of great interest as biomaterials. When heated in ammonia the glass transition and the crystallisation temperature are decreased compared with heating in air. After heating at 600 C for 72 h the sample indicated calcium pyrophosphate but after longer heating the orthophosphate was identified. Crystallisation in a wet atmosphere was also investigated. 18 refs.
ISSN:0261-8028
1573-4811
DOI:10.1007/BF00723358