Abstract
A precursor gel powder with the composition of CaTi4(PO4)6(CTP) was prepared by sol-gel process. On heating, this powder was amorphous up to 700°C and changed into a single phase of CTP at about 800°C. The relative density showed that the sinterablity of the amorphous powder was better than that of the crystallized powder. Some precursor gels with excess amounts of P2O5 (1wt%-9wt%) were also prepared by the same process. The presence of a small amount of P2O5 was effective for the sintering of compacts. Sintered material with the relative density of 94% and the bending strength of 72MPa was fabricated in the presence of 4wt% of P2O5.
