Ca-DEFICIENT HYDROXYAPATITE POWDER FOR PRODUCING TRICALCIUM PHOSPHATE BASED CERAMICS

摘要

The properties of Ca-deficient hydroxyapatite powder synthesized from calcium nitrate and ammonium hydrophosphate at 60℃, pH = 7, and Ca/P = 1.67, 1.61, and 1.48 are presented. After sintering at 1100℃ for 6 h the phase composition of the ceramic based on these powders was represented by tricalcium phosphate (Ca/P = 1.48) or tricalcium phosphate hydroxyapatite (Ca/P = 1.67 and 1.61). The grain size of the ceramic was 100 – 1000 nm.