Effect of Sintering Temperature on the Properties of Biogenic Hydroxyapatite–Glass Composites

Abstract

Composite materials based on biogenic hydroxyapatite and glass in the Na₂O–B₂O₃–SiO₂ system with the mass ratio 61 : 39 are obtained. The effect of sintering temperature between 600 and 800 °C on their basic properties is analyzed. To examine the effect of temperature, changes in the structure, linear and volume parameters, and density and porosity of the samples during sintering are studied. The pycnometric density of the composite is 2.904–3.009 g/cm³, apparent density 1.22–1.85 g/cm³, general porosity 36.2–59.5%, open porosity percentage 0.14–0.93, and solubility in physiological solution (48 h) 0.38–1.69 wt.%. It is established that the pore structure of the composites can be controlled by variation of sintering temperature.