By observing microstructures , we find they may form spheroidal A,acicular A and feathery A .
组织观察发现,除形成球状A、针状A外,还形成羽毛状A。
A process for the preparation of different particles of CaC03 is intruducted, the effect of various factors on CaCO3 crystal is discussed and spherical and plate-like calcium carbonate with small partical size are obstained.
Ca(NO3)2·4H2O and (NH4)3PO4·3 H2O used as reagents and polyvinylpyrrolidone (PVP) as template, spherical hydroxyapatite (HA) with diameter of 30~50 nm was synthesized successfully.