発泡剤として尿素を利用する噴霧熱分解法により調製した炭酸含有水酸アパタイト粉体の性質

概要

論文の詳細を見る
The effect of urea addition on the formation of hydroxy apatite (HAp) thrbugh the spray pyrolysis technique was examined. The crystanine phases of the powders prepared from the spraying solution without urea were HAp and a small amount of β tricalcium phosphate ; however, only carbonate containing HAp was formed from the solutions with urea concentrations of 1.00 mol dm^<-3> or higher. The SEM observations showed that the particle size of the as prepared powder decreased with increasing urea concentration in the spraying solution. This reduction of the particle size nray be due to the foarning action of C0_2 generated by the decomposition of urea. The relative density of the sintered body which originated from the solution with an urea concentration of 5.00 mol dm^<-3> was comparable to that from the calcined and crushed powder which was obtained by spray pyrolysing the solution without urea. The calcining and crushing operations before the fabrication of the sintered body may be onritted when the powders are prepared from starting solutions containing some urea.
社団法人日本セラミックス協会の論文
1995-12-01