Phosphoric Acid → Tricalcium Phosphate

Participants

Reaction Steps

As aqueous solution of phosphoric acid was reacted with a suspension of calcium hydroxide by a conventional method. The reaction product was dried and calcined at 1,200° C. to obtain α-tricalcium phosphate in powder form. 2 grams of this powder was mixed with 1 g of a setting solution having a viscosity at room temperature of 6,000 cp prepared by dissolving 0.1 g of chitosan ("Flonac N" made by Kyowa Yushi Kogyo K.K.) in 10 g of an aqueous solution of 40% citric acid. A plastic gum-like composition was obtained and this composition set in about 7 minutes to produce a setting material having a high strength.

Provenance & Evidence