申请人:Merck Patent GmbH
公开号:US20030235622A1
公开(公告)日:2003-12-25
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.
该发明描述了一种湿化学制备α-和β-三钙磷酸盐(TCP)粉末的过程。该过程只需将二氢磷酸铵立即加入到硝酸钙四水合物的水溶液中,或反之亦然。在空气中以800℃煅烧恢复的前体粉末产生β-TCP,而在相同条件下以1200℃煅烧,然后快速冷却至室温则得到亚微米颗粒的α-TCP粉末。这些粉末可以用作生物陶瓷的原材料,如人造骨骼、人造关节、人造牙根和基于磷酸钙的自固化、自硬化水泥。