Using of synthetic hydroxyapatite in bone china

In this study, hydroxyapatite powders with different Ca/P ratio (1,40, 1,45, 1,50, 1,67, 1,80, 2,07) were synthesized, thermal characteristic of these powders were analyzed and it was investigated using of these powders in a standard bone china body replacing of bone ash. Bone china bodies were prepared according to the developed model recipe (25 % Na-feldspar, 25 % Kaolin, 50 % Hydroxyapatite). With the tests applying onto bodies, the water absorption, density, firing shrinkage, colour of the standard and HA powder containing bodies sintered different temperatures between 1230 o C and 1290 o C were determined and its effect on their microstructure was tried to be found. In the light of these results, it was concluded that synthesized hydroxyapatite powders indicate a using capacity in the bone china body and that the bone china body prepared by using HA powder with Ca/P: 1.50 mol ratio has the same properties with commercial one