| 摘要 |
PURPOSE:To uniformly obtain a large amt. of tetracalcium phosphate by the method of calcinating calcium hydrogenphosphates with specified proportions or a compounded material of calcium pyrophosphate and calcium carbonate by pulverizing and mixing the compounded material in a wet state. CONSTITUTION:Calcium hydrogenphosphates or its dihydrate, or calcium pyrophosphate and calcium carbonate are compounded so as to obtain the molar ratio of Ca/P=2 and mixed by wet pulverization with using water a a mixing medium. For example, a pulverization tank 2 is filled with lots of pulverizing balls 4, into which the source slurry 6 is introduced and stirred with the balls forcedly by an agitating means 8. The obtd. mixture powder is then calcinated. By this method, production of apatite or CaO can be suppressed and single phase of tetracalcium phosphate can be obtd. in a shorter calcination time and mixing time. |
