Influence of pH Value and Dispersant on the β-calcium Phosphate Powders Prepared by Precipitation Method

Abstract

Abstract: Calcium phosphate was synthesized by precipitation methods with (NH_4)_2HPO_4 and Ca(NO_3)_2·4H_2O , Polyethylene glycol(PEG) was used as dispersant. The β-TCP powders was obtained after calcined at 850 ℃. The heat-treated powders were analyzed by X-ray diffraction (XRD), transmission electron microscopy (TEM) and particle size analysis. The influence of pH value and the molecular weight of PEG on the phase composition, agglomeration were investigated. It was found that the β-tricalcium phosphate powders with high purity, fine crystalline and steady dispersivity could be synthesized when the pH value is 7-8 and the molecular weight of PEG is 6000.

Key words: β-calcium phosphate;liquid phase co-precipitation;dispersant

CLC Number:

TB321

ZHAO Na-ru;KANG Hai-feng;LIU Meng-jiao;SUN Yuan-long;Li Pei-wei. Influence of pH Value and Dispersant on the β-calcium Phosphate Powders Prepared by Precipitation Method[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2010, 29(1): 49-52.

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Influence of pH Value and Dispersant on the β-calcium Phosphate Powders Prepared by Precipitation Method

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