Patent ID: 8609055

Claim:
A method of producing fluoroapatite by using a calcium-based compound containing calcium, hydrogen fluoride and phosphoric acid, the method comprising: preparing a first liquid containing the calcium-based compound, a second liquid prepared by mixing the hydrogen fluoride as a fluorine source and water and a third liquid containing the phosphoric acid, respectively; mixing the first liquid, the second liquid and the third liquid by adding the second and third liquids into the first liquid, drop by drop, to obtain a first mixture; stirring the first mixture; reacting the calcium-based compound, the hydrogen fluoride and the phosphoric acid in the first mixture at a temperature in the range of 5 to 50° C. to thereby obtain particles of the fluoroapatite; drying the particles to obtain dried particles of the fluoroapatite; and sintering the dried particles at a temperature in the range of 300 to 800° C. to obtain sintered particles of the fluoroapatite.