CALCIUM-PHOSPHATE MATERIALS PREPARED FROM PRECIPITATES WITH VARIOUS CALCIUM-PHOSPHORUS MOLAR RATIOS

Depending on the calcium:phosphorus molar ratio of the initial precipi tates determined by precipitation conditions (calcium:phosphorus molar ratio of reactants and pH of reaction environment), after sintering a t 1250 degrees C, monophase, biphase, or triphase ceramics consisting of hydroxyapatite, p-tricalcium phosphate, alpha-tricalcium phosphate, and calcium oxide were obtained, The phase, composition and propertie s-i.e., density, shrinkage, hardness, bending strength, and roughness- of the fractured surfaces of the isostatically re-pressed sinters were determined.