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《Heat Treatment of Metals》 2008-07
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Effects of composite TiO_2 on the crystal of hydroxyapatite prepared by sol-gel method

HAN Jian-ye1,2,YU Zhen-tao2,ZHOU Lian2(1.School of Materials Science and Engineering,Northwestern Polytechnical University,Xi′anShaanxi 710072,China;2.Biomaterials Research Center,Northwest Institute for Non Ferrous Metal Research,Xi′an Shaanxi 710016,China)  
Using sol-gel method,Hydroxyapatite/TiO2 composite material was prepared by mixing the Hydroxyapatite(HA) and TiO2 sol made from precursor together,and then drying and heat treating the mixed sol.The effect of TiO2 on the crystallization of HA was investigated by XRD.By analyzing the XRD data,the effects of TiO2 on grain size and crystallinity of HA were studied.The results show that the composite TiO2 delayed the crystallization,promoted the grain growth and accelerated the decomposition of HA.The grain size of composite HA is less than 100 nm,and the crystallinity reached up to 90% at the temperature for about 1000 ℃.
【Fund】: 西安市863成果转化专项(ZH06002)
【CateGory Index】: TB302
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