摘要
本文以Ca(NO3)2.4H2O和(NH4)2HPO4为原料水热条件下合成了羟基磷灰石晶体。研究了水热温度,保温时间,pH值,溶液浓度对合成羟基磷灰石晶体的影响,并借助X射线衍射(XRD)、红外吸收光谱(FT-IR)、扫描电子显微镜(SEM)对合成的羟基磷灰石进行了物相组成、化学组成、微观形貌的研究。结果显示,pH值对合成羟基磷灰石形貌有决定性的影响,调节pH值为5、7、8、9、10,羟基磷灰石形貌经历了长棒状、短棒状、球状的变化。确定pH值为10,正交试验研究其它三个因素对球状羟基磷灰石粒径的影响,三因素影响顺序依次为:初始溶液浓度>保温时间>水热温度。正交试验同时得到合成粒径小活性高的HA晶体的最佳工艺条件组合为:k2k1k3,即水热温度为140℃,保温时间为1 d,初始溶液浓度为0.5 mol/L。
Using Ca （ NO3 ） 2·4H2Oand （ NH4 ） 2 HPO4 as raw materials, hydroxyapatite crystals were synthesized under hydrothermal conditions and the effect of the hydrothermal temperatures and times, pH values and solution concentrations on hydroxyapatite crystals synthesis were researched in the paper. The phase composition, chemical composition, micromorphology of the obtained HA were characterized by X- ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscope, respectively. The results indicate that pH value play a decisive role on the synthesis of hydroxyapatite crystals. By adjusting pH value from 5 to 10, the micromorphology of HA gradually chang from long bar-like to shot bar-like until ball-like. Orthogonal experiments, fixing pH value of 10 and studying the other three factors on the effect of hydroxyapatite particle size, show that the order of three factors are as solution concentration 〉 hydrothermal time 〉 hydrothermal temperature and the optimum technological conditions of synthesizing HA with small particle size and high activity is k2klk3, that is to say, the hydrothermal temperature is 140℃ ,the hydrothermal time is 1 d and the solution concentration is 0.5 mol/L.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2012年第4期950-955,968,共7页
Bulletin of the Chinese Ceramic Society
基金
山东省高等学校科技计划项目(J11LD52)
关键词
羟基磷灰石
正交试验
PH值
hydroxyapatite
orthogonal experiment
pH value
