抄録
The caking behivior of apatite hydrogel was studied.Di-Sodium hydrogen phosphate dodeca-hydrate amd calcium chloride 2 hydrate was dissolved in distilled water,and pH was ajusted to be 7.40.The mixed solution was kept at room temperature for several days.The shrinkage behavior of obtained apatite hydrogel seems to be similar independs on the maturation period of mixed solution.With an increase of maturation period, particle size of apatite hydrogel decreased, while crystallite size of apatite hydrogel is almost the same.Re-aggergation process should be included in drying process,and the specimen with different particle size show the same manner of shrinkage during drying.
