Method of preparing alpha- and beta-tricalcium phosphate...

Details Method of preparing alpha- and beta-tricalcium phosphate... Method of preparing alpha- and beta-tricalcium phosphate...

C - Chemistry, Metallurgy

01

B

C01B 25/32 (2006.01)

Patent

CA 2432583

The invention describes a wet-chemical process for the preparation of alpha- and beta-tricalcium phosphate (TCP) powders. The procedure simply comprises immediate addition of di-ammonium hydrogen phosphate to an aqueous solution of calcium nitrate tetrahydrate, or vice versa. Calcination of the recovered precursor powders at 800°C in air produces beta-TCP, whereas the calcination of the same at 1200°C, followed by rapid cooling to room temperature yields submicron- particulated alpha-TCP powders. These powders can be the raw materials for bioceramics, such as artificial bones, artificial joints, artificial tooth roots, and calcium phosphate-based self-setting, self-hardening cements.

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