Sol-Gel法合成纳米羟基磷灰石及晶粒生长、结晶度的研究  

Crystal Growth and Crystallinity of Nano-Hydroxyapatite Prepared by Sol-Gel

作　　者：王少洪[1] 王浩[1] 侯朝霞[1] 胡小丹[1] 陆浩然[1] 薛召露[1] 牛厂磊[1] 王彩[1] 

机构地区：[1]沈阳大学辽宁省先进材料制备技术重点实验室,辽宁沈阳110044

出　　处：《稀有金属材料与工程》2011年第S1期44-47,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50702035);辽宁省自然科学基金项目(20092043);辽宁省优秀人才支持计划(2009R43);辽宁省教育厅高校科研计划(2008S154);沈阳市重点实验室建设专项(F10216100)

摘　　要：以Ca(NO3)2·4H2O与H3PO4为前躯体,采用溶胶-凝胶法制备出纳米羟基磷灰石(HA)粉体。通过差热分析仪、X-射线衍射仪、SEM对HA粉体及烧结体进行了表征和分析,采用阿基米德排水法测试了样品密度。结果表明:粒径分布均匀、呈球形、团聚极少,a轴方向和c轴方向的晶粒尺寸分别为10~30nm和20~50nm,随着温度的升高颗粒的尺寸和结晶度增大。600℃烧结2h得到纯度高、晶化好的HA;800和900℃烧结样品中出现的少量Ca3(PO4)2和CaO是由于HA的分解和含磷前躯体的挥发所致。Nano-hydroxyapatite (HA) were prepared by sol-gel method with Ca(NO3)2·4H2O and H3PO4 as precursors. HA powder and the sintered compact were analyzed and characterized by differential thermal analysis, X-ray diffractometry, and scanning electron microscope. The density was measured by Archimedes drainage method. Results show that the powder is spherical with very little reunion and the particle sizes distribute uniformly. The grain sizes in a-axis and c-axis direction are 10-30 nm and 20-50 nm, respectively. The particle size and crystallization percent are increased with the increase of temperature. HA sintered at 600 °C for 2 h is of high purity and good crystallization. There is a small amount of Ca3(PO4)2 and CaO in the HA sintered at 800 °C and 900 °C, which is due to the HA decomposition and the phosphorous volatilization.

关 键 词：羟基磷灰石 溶胶-凝胶法 纳米粉体 

分 类 号：TB383.1[一般工业技术—材料科学与工程]