非晶質リン酸カルシウムの生成に及ぼすコハク酸吸着の影響

概要

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Adsorption of dissolved succinic acid on the formation of ACP and its stability were investigated in the syn thetic process of ACP by the reaction of CaCl_2 (NH_4)_2 HPO_4 C_4H_6O_4 NH_4OH. The crystallization of ACP to HAp and amount of succinic acid adsorbed were affect ed by some conditions such as initial pH, temperature, aging time and concentration of succinic acid in the mother liquor. The largest amount of succinic acid was adsorbed to ACP when the ACP was produced at 0℃, initial pH 10 and concentration of succinic acid 6.0 mass% and aged at 25℃ for 3h. From the result of in frared spectra of the ACP which adsorbed succinic acid, two peaks due to carboxylic acid were newly found at 1400 cm^<-1> and 1550 cm^<-1>. These peaks were not found from the result for a mixture of ACP and suc cinic acid. The adsorbed succinic acid was decomposed at about 480℃ and ACP was crystallized to Ca_3 (PO_4)_2 at above 600℃ by heating.
社団法人日本セラミックス協会の論文
1994-12-01