孔径可控的多孔羟基磷灰石的制备工艺研究

Preparation and processing of porous hydroxyapatite ceramics with controlled pore sizes

采用添加造孔剂法，选择合适的造孔剂聚甲基丙烯酸甲酯 （ PMMA）， 通过严格筛分，可烧结制得孔径可控的多孔羟基磷灰石陶瓷， 气孔率可从 20％到 50％变化。 并对烧结多孔体中孔的结构、孔径分布与特征，影响气孔率和力学性能的因素进行了研究与讨论。

Hydroxyapatite ceramics with controlled porosity and pore size were prepared by adding PMMA as pore－ forming agent(PFA). Samples were prepared with total pore volumes changing from 20％ to 50％ .The pore structure ,pore size distribution and characteristics were studied, and it was found that the hydrox－ yapatite ceramics with controlled－ porosity could prepared by adding PMMA as PFA . As well, the factors influencing porosity and mechanical strength of porous ceramics were discussed.