Porous nanosized CHA/β-TCP biphasic bioceramics were prepared by microwave plasma sintering in a wet carbon dioxide atmosphere to improve its biological and mechanical performance. Through the optimization of sintering parameters including the sintering temperature and the holding time, porous bioceramics with average crystal size of 92nm, porosity of 55.9%, CO32- content of 4wt% and compressive strength of 13.7MPa were obtained. The comparison between conventional sintered specimens and microwave plasma sintered specimens showed that the latter exhibit smaller crystal size and higher carbonate content and compressive strength. Microwave plasma sintering is a promising method of preparing nanosized bioceramics.
