Conferences

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

  
V.Klimenko,
 
I.Uvarova,
 
A.B.Tovstonog,
   

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2015, #01/02
http://www.materials.kiev.ua/article/1893

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.


BIOMATERIAL, HYDROXYAPATITE, SILICA, SPECIFIC SURFACE AREA, STRUCTURE