Densification and Decomposition Behavior of Isostatically Pressed and Sintered Hydroxyapatite Powders of Nano and Submicron Sizes

摘要

Nanosized and submicron sized hydroxyapatite (HA) powders were produced by using chemical precipitation method and by calcination of animal bone, respectively. The obtained powders, both separately and mixed at equal proportions, were isostatically pressed. The compacts were sintered at two different temperatures, 900 and 1200 °C, in order to investigate the effects on microstructure, densification and HA decomposition. Mechanical properties of obtained samples were compared by means of compressive strength and microhardness measurements.