Preparation of Silicate Substituted Calcium Deficient Hydroxyapatite by Coprecipitation
This paper presents a typical coprecipitation method to synthesize silicate-substituted calcium deficient hydroxyapatite (SiCDHA). A homogeneous aqueous solution of Ca(NO3)2• 4H2O, H3PO4 and Si(CH3CH2O)4 (TEOS) was used as precursor, and NH3 aqueous solution as precipitator. A series of samples were prepared by adding the precipitator to the precursor then following a general coprecipitation route. The results showed that the so-prepared samples were SiCDHA. SiCDHA was thermal unstable and decomposed to tricalcium phosphate and wollastonite-like phase. These new phases were helpful to improve the bioactivity of sintered SiCDHA ceramics.
Xingdong Zhang, Xudong Li, Hongsong Fan, Xuanyong Liu
H. B. Shi et al., "Preparation of Silicate Substituted Calcium Deficient Hydroxyapatite by Coprecipitation", Key Engineering Materials, Vols. 330-332, pp. 83-86, 2007