SiO2-Al2O3/HA空心微球的制备及相关机理研究

摘要

SiO2-Al2O3/HA hollow microspheres are fabricated by chemical method through depositing hydroxyapatite particles on the surface of SiO2-Al2O3 hollow microspheres. The results indicated that both before and after being deposited, samples can own ideal spherical structure, and hydroxyapatite particles are coated on the surface of SiO2-Al2O3 hollow microspheres. In addition to 3A12O3 · 2SiO2, SiO2 and hydroxyapatite, a few of Ca2Si04 and Ca(OH)2 also exist in the products.%采用化学沉积技术在SiO2-A12O3空心微珠表面沉积羟基磷灰石获得SiO2-A12O3/HA空心微球.结果表明羟基磷灰石以颗粒状均匀地沉积在空心微珠表面,且所得微球仍具有理想的球形结构；SiO2-Al2O3/HA空心微球中除构成SiO2-A12O3空心微珠的主要组分(3Al2O3·2SiO2、SiO2)及羟基磷灰石外,还存在少量的Ca2SiO4及Ca(OH)2.