Calcium phosphate ceramics with continuously gradient macrochannels using three-dimensional extrusion of bilayered ceramic-camphene mixture/pure camphene feedrod

摘要: Abstract We herein demonstrate a novel, versatile approach to produce calcium phosphate (CaP) ceramics with continuously gradient macrochannels using three-dimensional extrusion of bilayered ceramic-camphene mixture/pure camphene feedrod. In this technique, the pure used as upper part could be preferentially extruded because wall slip phenomenon. This enabled formation green filaments comprised core surrounded by ceramic/camphene shell, where core/shell thickness ratio increased gradually proceeded. CaP successfully produced three-dimensionally depositing layer-by-layer. With increasing distance from dense bottom layer, created after removal cores via freeze-drying became larger, while walls thinner. The local porosity increase and reach up ~72 vol%.