beta-tricalcium phosphate(TCP, Ca-3(PO4)(2)) ceramics are preferred as a bioceramics because of its chemical stability and reasonable degradation rate in vivo, but it is difficult to obtain beta-TCP ceramics with high compressive strength at lower temperature than that of phase transition to alpha-TCP. In this study, the sintering behavior of TCP, Ca2P2O7-doped TCP, and CaCO3-doped TCP in the range of 2wt%similar to 5wt% were investigated respectively. Phase transition of pure TCP took place between 1100 degrees C to 1150 degrees C, and pure beta-TCP ceramics could achieve a compressive strength of only 3MPa. However, calcium pyrophosphate (CPP, Ca2P2O7) additive prevented the transformation of beta-TCP to alpha-TCP, but the second phase of CPP was observed in the resultant ceramics. Phase transition of TCP ceramics by addition of both CPP and calcium carbonate (CC, CaCO3) took place between 1200 degrees C to 1250 degrees C and the resultant TCP ceramics had few impurity of CPP. By adding CPP and CC to TCP, final ceramics with compressive strength over 12MPa could be obtained when sintered at 1200 degrees C for 2hrs.