Synthesis and Properties of Si-Modified Ceramics Based on Biogenic Hy-droxyapatite

Abstract

The possibility to produce Si-modified ceramics based on biogenic hydroxyapatite is shown. The introduction of 2 and 5 wt.% methyl silicic acid hydrogel in silicon equivalent and subsequent sintering at 600 °С increase the specific surface area by 10 times, from 6.1 to 59.8 m²/g. The porosity of ceramics increases from 43.0 to 62.3% when the modifying addition reaches up to 5 wt. %, the compressive strength being equal to 27–33 MPa. The modifying addition also influences the structure and reduces the minimum grain size of the material from 0.65 to 0.1 μm.