溶胶-凝胶法制备纳米硅灰石  

Preparation of Nanometer WoUlastonite by Sol-Gel Method

作　　者：周永强[1] 薛林威[1] 张景峰[1] 尹德武[1] 郭潇武[1] 

机构地区：[1]温州大学化学与材料工程学院,浙江温州325027

出　　处：《稀有金属材料与工程》2008年第A02期434-436,共3页Rare Metal Materials and Engineering

摘　　要：以正硅酸乙酯和氯化钙为原料,采用溶胶-凝胶法制备了高纯纳米硅灰石,探讨了前驱体的制备工艺条件,用IR、XRD和SEM等手段对纳米硅灰石进行了表征。实验结果表明:前驱体的制备工艺条件为:R≥4,pH=1～3,f≤60℃;前驱体在900℃烧结1 h合成出70～100 nm的四方状晶粒及其聚合体组成的高温型硅灰石纳米粉体:采用溶胶-凝胶法制备纳米硅灰石,烧结温度低,比常用的高温固相合成法要低400℃以上,烧结时间短,产物白度和纯度高。High purity nanometer wolllastonite was prepared by sol-gel method using tetraethyl silicate and calcium chloride as the raw materials. The preparing conditions of the precursor were determined. The nanometer wolllastonite was characterised by IR, XRD and SEM. The results show that the preparing conditions of the precursor was R≥4, pH= 1-3, t≤60 ℃. The precursor was sintered to form high-temperature type wolllastonite nanometer powder composed of 70-100 nm squarish appearance particles and its combining particles at 900 ℃ for 1 h. That nanometer wolllastonite prepared by sol-gel method has characteristic of lower sintering temperature, falling more than 400℃ compared with sintering temperature of usual high temperature solid-state sintering method, shorter sintering time, high purity and whiteness of product.

关 键 词：溶胶-凝胶法 纳米 假硅灰石 

分 类 号：TB383.1[一般工业技术—材料科学与工程]