氧化铝原料对合成CA_6多孔骨料性能的影响  

Influence of Alumina Materials on Properties,Phase Composition and Microstructure of Calcium Hexaluminate Porous Aggregates

作　　者：李天清[1] 李楠[1] 卜源[1] 贺中央 

机构地区：[1]武汉科技大学高温陶瓷与湖北省重点实验室,湖北武汉430081 [2]濮耐高温材料有限公司,河南濮阳457100

出　　处：《工业炉》2006年第4期43-46,共4页Industrial Furnace

摘　　要：以工业氧化铝、活性氧化铝、拟薄水铝石和氢氧化铝微粉为氧化铝原料,采用反应烧结法合成六铝酸钙多孔骨料,借助XRD和SEM等分析手段研究了氧化铝原料和煅烧温度对合成多孔骨料的性能、相组成和显微结构的影响。研究表明,采用工业氧化铝和活性氧化铝微粉作为氧化铝原料可以合成出显气孔率55%左右、孔径集中分布在5μm以下的高纯度和高强度六铝酸钙多孔骨料,多孔骨料的气孔孔径较大,必须采用粒度更细的氢氧化铝原料。因不能获得高纯度和形成片状晶体六铝酸钙材料,拟薄水铝石不适合作为合成六铝酸钙多孔骨料的原料。Influence of alumina materials, such as industrial alumina, active alumina, alurninium hydroxide and pseudo-boehmite on properties, phase composition and microstructure of calcium hexaluminate porous aggregates was studied by means of XRD and SEM in this paper. The results showed that the microporous aggregates with high calcitun hexalurninate content, high strength and high apparent porosity can be preparated by used industrial alumina , active alumina and aluminitun hydroxide with smaller granularity as alumina materials at 1 500 ℃, and the pore size distribution of the aggregates preparated by used aluminium hydroxide is too wide, and the aggregates with high calcium hexaluminate content and the planar grains can not be getted when pseudo-boehmite was used as raw material.

关 键 词：六铝酸钙 多孔骨料 氧化铝原料 

分 类 号：O614.31[理学—无机化学]