SiO_2矿化剂对钛酸铝材料结构与性能的影响  

Influence of SiO_2 on Aluminium Titanate Structure and Performance

作　　者：沈阳[1] 阮玉忠[1] 

机构地区：[1]福州大学材料科学与工程学院,福州350108

出　　处：《硅酸盐通报》2008年第6期1221-1224,1229,共5页Bulletin of the Chinese Ceramic Society

基　　金：国家"863"(2003AA322020)项目;福建省自然科学基金(708J0129);福建省发改委项目资助

摘　　要：以铝型材厂污泥为主原料合成Al2TiO5材料,在合成的Al2TiO5中添加少量SiO2矿化剂,与Al2TiO5形成固溶体,抑制Al2TiO5的分解,达到提高Al2TiO5热稳定性的目的。采用XRD法和SEM法表征各试样的晶相结构和显微结构;用Rietveld Quantification法确定各试样中各晶相的含量;测试各试样的性能。结构与性能分析结果表明较佳SiO2矿化剂添加量为2%,较佳烧结温度为1450℃,对应抗折强度为44.3MPa,体积密度为3.28g/cm3,气孔率为6.3%,吸水率为1.9%,热震后抗折强度保持率为84.2%。By adding small amount of SiO2 mineralizer into Al2TiO5 which was synthesized from waste aluminum slag, it can form substitutional solution with Al2TiO5 and thus suppress its decomposing and enhance its thermal stability. X-ray diffraction （XRD） and scanning electron microscopy （ SEM ） were used to characterize the crystalline phases and microstructures; Rietveld Quantification software was used to calculate the content of each phase. The performance of each sample was also tested. The results show that the best content of SiO2 additive is 2%, the best sintering temperature is 1450℃, the corresponding bulk density is 3.28 g/cm3, porosity is 6.3%, water absortion is 1.9% ,bending strength is 35.32 MPa, and bending strength stability after thermal shock is 84.2%.

关 键 词：SiO2矿化剂 AL2TIO5 晶相结构 显微结构 性能 

分 类 号：TB321[一般工业技术—材料科学与工程]