利用铝材厂污泥研制刚玉/莫来石/钛酸铝复相材料

RESEARCH ON MULLITE/CORUNDUM/ ALUMINUM TITANATE COMPOSITES BY WASTE SLAG OF ALUMINUM FACTORY

本研究以铝型材厂煅烧污泥为主原料,研制刚玉/莫来石/钛酸铝复相材料。本实验主要探讨不同配方对复相材料结构与性能的影响,从而确定较佳的配方。用XRD和SEM分析确定各试样的晶相和结构,应用Rietveld quantification软件计算试样中各晶相的含量,测试各试样性能。实验结果,各试样形成3种晶相:α-Al2O3、Al4.59Si1.41O9.7和Al2TiO5,其中Al4.59Si1.41O9.7是主晶相。分析结果,确定NO.4为最佳的配方,其对应晶相含量:α-Al2O3为15.2%、Al4.59Si1.41O9.7为57.6%、Al2TiO5为27.2%;其对应的抗折强度107.63Mpa,一次热震强度抗折强度保持率为41.51%。

In this research, waste slag of aluminum factory was used as raw material to synthesize Mullite-eorundum-Aluminum titanate composites material. The influences of formula on the structure and properties of composites were investigated. Hence, The optimum formula were determined.XRD was used to characterize the crystalline phases of sintered samples. SEM was used to characterize the structure of sintered samples. Rietveld quantification analysis was performed to calculate the content of crystalline phases. Moreover, the properties of all sintered samples were characterized.The results show that there are three crystalline phase, α-Al2O3、Al4.59Si1.41O9.7 and Al2TiO5, formed in all sintered specimens. The Al4.59Si1.41O9.7 is the main phase. As the analysis results, The optimum formula was determined to be the sample No.4. The corresponding crystalline phases composed of 15.20% α-Al2O3, 57.60% Al4.59Si1.41O9.7 and 27.20% Al2TiO5 ,The corresponding bending strength is 107.63MPa, bending strength maintance after thermal shock is41.51%.