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The technique conditions of synthesis of hydroxyapatite(HAP) powder were studied by Sol Gel and chemical coprecipitation processes.The FTIR was applied to determine the chemical composition of the prepared product.The Ca/P ratio was determined also and compared with stoichimetric ratio of hydroxyapatite.The cross experiment result indicated that the optimum technique condition to gain high purity HAP powder involves Ca/P 1.67 ,pH 8.0,temperature 950℃,reaction time 3.5h when (C 4H 9O) 3PO and Ca(NO 3) 2 were used as starting materials;Ca/P 1.67 ,temperature 37.5℃,pH 9.0 and Ca/P 1.50,temperature 80℃,pH 11.0 when H 3PO 4 and Ca(OH) 2 were used as starting materials;and Ca/P 1.50,temperature 37.5℃,pH 9.0,Ca/P 1.67,temperature 50℃,pH 9.0 and Ca/P 1.67,temperature 70℃,pH 10.0 when (NH 4) 2HPO 4 and Ca(NO 3) 2 were used as starting materials.
The technique conditions of synthesis of hydroxyapatite (HAP) powder were studied by Sol Gel and chemical coprecipitation processes. The FTIR was applied to determine the chemical composition of the prepared product. The Ca / P ratio was determined also and compared with stoichimetric ratio of hydroxyapatite The cross experiment result indicated that the optimum technique condition to gain high purity HAP powder containing Ca / P 1.67, pH 8.0, temperature 950 ° C, reaction time 3.5h when (C 4H 9O) 3PO and Ca (NO 3) 2 were used as raw materials; Ca / P 1.67, temperature 37.5 ° C, pH 9.0 and Ca / P 1.50, temperature 80 ° C, pH 11.0 when H 3 PO 4 and Ca (OH) 2 were used as starting materials; 37.5 ° C, pH 9.0, Ca / P 1.67, temperature 50 ° C, pH 9.0 and Ca / P 1.67, temperature 70 ° C, pH 10.0 when (NH 4) 2HPO 4 and Ca (NO 3) 2 were used as starting materials.