Abstract
Abstract The porous β-tricalcium phosphate (TCP) bioceramic scaffolds were successfully prepared by 3D gel-printing method. The calcium phosphate salt precursor was synthesized by hydration precipitation method and calcium chloride and diammonium hydrogen phosphate were as raw materials. The rheological properties of slurries with different calcium to phosphorus (Ca/P) ratios and the shrinkage and porosity of the printed scaffolds were studied in this paper. Also, the effect of different Ca/P ratios on the composition of powders was studied. The calcium phosphate salt powders with average particle size of 37.12 μm were used in this study and the maximum solids loading of the slurry which is suitable for printing was about 50 vol% and the printing green scaffolds have well-distributed designed voids and microporous. The β-TCP bioceramic scaffolds were obtained by sintering at 1100 °C for 3 h when Ca/P ratio is 3.5. The porosity of the sintered scaffold is approximately 58.05% which is suitable for bone growth in bone repair engineering.
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