Low‐Temperature Formation of Fluorapatite in Aqueous Solution
作者:
Mark Fulmer,
Paul W. Brown,
期刊:
Journal of the American Ceramic Society
(WILEY Available online 1992)
卷期:
Volume 75,
issue 12
页码: 3401-3407
ISSN:0002-7820
年代: 1992
DOI:10.1111/j.1151-2916.1992.tb04441.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
The low‐temperature formation of Fluorapatite by the reaction of particulate calcium phosphate precursors in aqueous solution was investigated:Variations in the aqueous phase were measured and these corelated with the consumption of reations and the formation of apatitic phases. The variations in solution pH and fluoide are in accord with a mechanism by which CaF2precipitates relatively early in the reaction. After this, minimal fluoride is consumed until the formation of an apatitic phase reaches substantial for hydroxl and the pH increase. The extent of aptite formation exhibits a storong dependence on the concetration of the NaF solution in which reation is occuring. Analysis of reaction is saturated CaF2solution indicates that apatite formation precedes the uptake of fluoride from solution. For reaction in dilute suspension, a low concentration of NaF retards apatite formation whereas a higher one accelerates it. Alternatively, when reaction is carried outa low liquid‐to‐solids rario, apatite formation is accelerated in NaF solution regardless of concetr
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