PREPARATION OF SPHERICAL POWDERS OF HYDROXYAPATITE BY SOL-GEL PROCESS

被引：88

作者：

DEPTULA, A ^{[1
]}

LADA, W ^{[1
]}

OLCZAK, T ^{[1
]}

BORELLO, A ^{[1
]}

ALVANI, C ^{[1
]}

DIBARTOLOMEO, A ^{[1
]}

机构：

[1] ENTE NAZL ENERGIE ALTERNAT,CRE,CASACCIA,ITALY

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1992年 / 147卷

关键词：

D O I：

10.1016/S0022-3093(05)80672-6

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Spherical powders of hydroxyapatite with particle diameters below 100 mum were prepared using the water extraction variant of the sol-gel process. A freshly prepared solution of calcium acetate and phosphoric acid (molar ratio Ca/P = 1.67) was emulsified in dehydrated 2-ethyl-1-hexanol. Drops of the emulsion were solidified by extraction of water with this solvent. The process was carried out continuously. The separated gel particles were calcined to hydroxyapatite particles with preservation of the spherical shape. This process was studied using differential thermal analysis, thermal gravimetric analysis, X-ray diffraction analysis and infrared spectroscopy. During thermal treatment, the formation of calcium carbonates is observed first. Above 400-degrees-C, the formation of hydroxyapatite starts and then at 580-degrees-C formation of carbonate hydroxyapatite starts. The last step, decomposition to hydroxyapatite, proceeds above 750-degrees-C.

引用

页码：537 / 541

页数：5