摘要
用铝型材厂废渣,高岭土和TiO2为主要原料固相烧结合成钛酸铝-莫来石复相材料。探讨不同原料配比对材料晶相及微观形貌的影响。采用X-射线衍射仪(X-Ray diffraction,XRD),扫描电镜(Scanning electron microscopy,SEM)及相关分析软件表征复相材料的晶相组成和显微结构。研究结果确定最佳的原料配比为:铝型材厂废渣∶高岭土∶TiO2(质量比,下同)为:68∶13∶19,此时复相材料的主要相组成为钛酸铝(Al2TiO5):60.8%,莫来石固溶体(Al4.544Si1.456O9.368):22.7%,扫描电镜观察结果显示Al2TiO5晶体呈自形状,而莫来石固溶体主要以柱状和针状产出,材料体积密度达到3.53g/cm3,气孔率为9.8%,抗折强度为34.15MPa。
Aluminium titanate-mullite composite was synthesized following solid-phase-sintering routine by using waste aluminum slag, kaoline and TiO2 powder as main raw materials. The influences of different ratios of raw materials on the crystalline phases and microstructures were discussed. X-ray diffraction （XRD）, scanning electron microscopy （SEM） and relevent analytical software were used to characterize the crystalline phases and microstructures of derived composite. The results show that the best ratio for waste slag, kaoline and TiO2 powder is 68 ： 13 ： 19（ mass fraction）. The composite contains about 60.8% of aluminium titanate and 22.7% of mullite solid state solution phase. SEM observation results show that Al2TiO5 phase take automorphic shape and mullite phase are mainly needle-like shape. The result of performance analysis revealed that its bulk density is 3.53 g/cm^3 ,the porosity is 9.8% and bending strength is 34.15 MPa.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2008年第4期721-724,共4页
Bulletin of the Chinese Ceramic Society
基金
福建省自然科学基金计划资助项目(T0750005)
福州大学科技发展基金项目资助(2007-XQ-02)
关键词
铝厂废渣
钛酸铝
莫来石
复相材料
waste aluminum slag
aluminium titanate
mullite
composite materials
