Synthesis of Apatite Ceramics with Bimodal Pore Structure Using Mechanochemically Prepared Fine Apatite Powder
Preparation of apatite ceramics with bimodal pore structure was studied. First fine hydroxyapatite powder was obtained through mechanochemical method. The particle size of the product was around 0.64 µm. The slurry with the fine apatite powder content of 55-62.5wt% was prepared using defloculant, and foaming reagent. The organic form was immersed into the slurry, dried under vacuum, and heated at 1100°C, 1200°C, 1300°C. Pore size distribution of the product measured by porosimeter showed that small pores of around 1 µm and large pores of 100 µm exist, and SEM observation confirmed. SEM observation showed that the large pores seemed to be interconnected through the openings of several dozens µm in size. The porosity of the products were found to be 48 – 58.5%, and the bending strength of the products obtained by heat-treatment at 1100°C for 3 hours was 5.6 MPa, and that at 1200°C was 10.5 MPa.
Wei Pan, Jianghong Gong, Chang-Chun Ge and Jing-Feng Li
Y. Zhang et al., "Synthesis of Apatite Ceramics with Bimodal Pore Structure Using Mechanochemically Prepared Fine Apatite Powder", Key Engineering Materials, Vols. 280-283, pp. 1571-1574, 2005