Preparation of Porous Bioceramics by a Simple PVA-Processing Route

摘要

A robust procedure of preparing macro- and micro-porous calcium phosphate bioceramics is presented. The method involved the simple blending of a water soluble polymer (PVA, polyvinyl alcohol) solution and a fine calcium phosphate powder, followed by immediate in situ gelation and then calcination at high temperatures to burn off the polymer to form the interconnected porosity. Porous shapes (even morsels or blocks) are obtained with porosity over the variable range of 35 to 70%, with macropores ranging from 100 to 1000 μm. Sample characterization was performed via X-ray diffraction, quantitative chemical analysis, optical and electron microscopy, and compressive strength measurements.