Influence of Tiron concentration on dispersability and sintering behaviors of hydroxyapatite in an aqueous system |
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Authors: | T Navizi E Salahi M Ghafari I Mobasherpour |
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Affiliation: | Ceramics Department, Materials and Energy Research Center (MERC), P.O. Box 14155-477, Tehran, Iran |
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Abstract: | Rheological and sintering behaviors of hydroxyapatite slurries with different Tiron concentrations were investigated. It was shown that HAp slurries could be stabilized at pH 11 with 2.25 wt% Tiron concentrations. Results confirmed that well dispersed slurries could be obtained with solid content as high as 50 wt%. Zeta potential measurements were conducted on HAp powders evaluated the influence of dispersant on surface charge properties of the particles. X-ray diffraction technique was used to study the crystalline phase evolution; scanning electron microscopy was used to estimate the particle size of the powder and fracture surfaces of bodies sintered at various temperatures. After sintering process at 1200 and 1350 °C, relative density and bending strength of HAp samples reached 76.67% and 92.18% and 57.77 and 97.36 MPa, respectively. |
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