材料科学
多孔性
煅烧
球体
化学工程
热稳定性
热分解
磷灰石
纳米颗粒
矿物学
热液循环
复合材料
纳米技术
化学
生物化学
物理
有机化学
天文
工程类
催化作用
作者
Qian He,Zhi Huang,Xiao Kun Cheng,Jun Yu
标识
DOI:10.1016/j.matlet.2007.06.001
摘要
Porous A-type carbonated hydroxyapatite (CHAp) spheres were synthesized in the high-pressure hydrothermal system by the template-directed method. The thermal stability of porous A-type CHAp spheres was first studied via calcining in the wide temperature range from 393 K up to 1173 K, analyzed by FT-IR, XRD and SEM. The results showed that the decomposition of porous A-type CHAp spheres went through two stages, owing to the release of the carbonate from the OH− channel and the collapse of apatite-type structure above 973 K, consecutively. The nanoparticles in situ replaced the flakelets of porous CHAp spheres and packed closely into new regular porous Ca3(PO4)2 spheres.
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