沉淀法制备羟基磷灰石反应条件控制研究  

Control of reaction conditions in preparation of hydroxyapatite with precipitation method

作　　者：门智新[1] 孙奉娄[1] 何翔[1] 

机构地区：[1]中南民族大学,湖北武汉430074

出　　处：《无机盐工业》2011年第1期27-29,共3页Inorganic Chemicals Industry

基　　金：武汉市重点科技攻关计划项目(200761023420)

摘　　要：为了方便快速地获得高纯度羟基磷灰石,以磷酸氢二铵和四水硝酸钙为原料,利用沉淀法制备纳米级羟基磷灰石粉末。描述了制备过程;对温度、pH、分散剂添加量、钙磷物质的量比、烧结温度等反应控制条件进行了研究;对钙磷物质的量比及烧结温度做了详细的讨论。制备羟基磷灰石的最佳工艺条件:pH为10.5,n(Ca)/n(P)=2.0,反应温度为40℃,剧烈搅拌2 h,陈化温度为50℃,分散剂添加量为3%(质量分数),以酒精洗涤,120℃干燥2 h,900℃烧结2 h。此法可得到分散性、均匀性好,纯度高、颗粒小、晶形完整的纳米级羟基磷灰石。To facilitate quick access to high-purity hydroxyapatite,nano-sized hydroxyapatite powder was prepared by precipitation method with（NH4）2HPO4 and Ca（NO3）2·4H2O as raw materials.Preparation process was described.Reaction conditions,such as temperature,pH,dispersing agent dosage,amount-of-substance ratio of calcium to phosphorus,and sintering temperature,were studied and a detailed discussion was made on amount-of-substance ratio of calcium to phosphorus and sintering temperature.Optimum preparation conditions of hydroxyapatite were as follows：pH=10.5,n（Ca）/n（P）=2.0,reaction temperature was 40 ℃,acute stirring for 2 h,aging temperature was 50 ℃,dispersant dosage was 3%（mass fraction）,alcohol as abstergent,drying for 2 h at 120 ℃,and sintering for 2 h at 900 ℃.Nano-sized hydroxyapatite with good dispersion and uniformity,high purity,small size,and intact morphology can be prepared under those conditions.

关 键 词：羟基磷灰石 沉淀法 烧结温度 晶形 

分 类 号：TQ126.35[化学工程—无机化工]