反应烧结温度对自结合钛酸铝/莫来石复相材料的影响  

Influence of Sintering Temperature on Self-bonded Aluminium Titanate-mullite Materals

作　　者：陈捷[1] 陈奇俤[1] 阮玉忠[1] 沈阳[1] 于岩[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》2009年第4期714-717,共4页Bulletin of the Chinese Ceramic Society

基　　金：福建省发改委重点项目资助

摘　　要：本研究以铝型材厂污泥、龙岩高岭土和工业二氧化钛为原料制备钛酸铝/莫来石复相材料,在钛酸铝材料中引入莫来石晶相,从而提高Al2TiO5的稳定性,防止降温时的分解。本文主要探讨反应烧结温度对复相材料中形成的晶相、显微结构及其含量的影响,从中确定最佳反应烧结温度。采用XRD法和SEM法表征各试样形成的晶相和显微结构;用RietveldQuantification法确定各试样中各晶相的含量。综合XRD、SEM和性能分析结果,确定1510℃为最佳烧结温度,其对应的体积密度为2.88g/cm3,抗折强度为40.44MPa,热震抗折强度保持率为97.2%。Aluminium titanate-mullite composite was synthesized from longyan kaolinite, industrial titanium dioxide and waste sludge of aluminium factory as the raw materials. The second phase of mullite can improve the stability of Al2TiO5 and decrease its decomposition during the cooling. In this paper, the influence of sintering temperature on the microstructure, phase structure of the target composite as well as the content of each crystalline phase, was mainly discussed to determine the optimum one. In addition, XRD and SEM techniques were used to characterize the crystalline phase and microstucture of each sintered specimen, and Rietveld Quantification software was performed to determine the content of each phase. According to the experimental results, preferred sintering temperature is determined as 1510 ℃ to obtain the ceramics with bulk density of 2.88 g/cm^3, bending strength of 40.44 MPa and thermal shock maintenance of 97.2%.

关 键 词：铝型材厂污泥 钛酸铝/莫来石复相材料 反应烧结温度 

分 类 号：TB321[一般工业技术—材料科学与工程]