添加La2O3对粉煤灰合成Al2O3-SiC复合粉体的影响  被引量:1

Effect of La_2O_3 Addition on Synthesis of Al_2O_3-SiC Composite Powders from Fly Ash

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作  者:尹月[1] 马北越[1] 张博文[1] 李世明[1] 于景坤[1] 张战[2] 李光强[2] YIN Yue MA Beiyue ZHANG Bowen LI Shiming YU Jingkun ZHANG Zhan LI Guangqiang(School of Metallurgy, Northeastern University, Shenyang 110819 The State Key Laboratory of Refractories and Metallurgy, Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081)

机构地区:[1]东北大学冶金学院,沈阳110819 [2]武汉科技大学,省部共建耐火材料与冶金国家重点实验室,钢铁冶金及资源利用省部共建教育部重点实验室,武汉430081

出  处:《材料导报》2017年第4期111-114,120,共5页Materials Reports

基  金:钢铁冶金及资源利用省部共建教育部重点实验室开放基金(武汉科技大学)(FMRU201401);中央高校基本科研业务费专项资金(N150204021)

摘  要:以粉煤灰和活性炭为原料,通过碳热还原反应在Ar气氛下合成Al_2O_3-SiC粉体,探究了一条低成本合成Al_2O_3-SiC粉体的可行途径。研究了添加La_2O_3对合成过程的影响。采用XRD和SEM表征了材料的物相组成和显微形貌。结果表明:当粉煤灰与活性炭质量比为100∶44,在1 550℃下保温5h,添加6%(质量分数)的La_2O_3时,可合成性能良好的Al_2O_3-SiC粉体,颗粒分布均匀,平均粒径为0.5~1μm,较不添加La_2O_3合成温度降低约50℃。Al2O3-SiC powders were synthesized by carbothermal reduction reaction in an argon atmosphere,with fly ash and activated carbon as raw materials.It provides a feasibility route with low-cost to the synthesis of Al2O3-SiC powders.The influence of La2O3 addition on the synthesis process was studied.The phase composition and microstructure of the powders were characterized by XRD and SEM.Results showed that the Al2O3-SiC powders could be synthesized at 1 550 ℃for 5h,when the mass ratio of fly ash to activated carbon was 100∶44with addition of 6% La2O3(mass fraction).The powders had good performance,uniform particle distribution,and the average particle size was about 0.5-1μm.The synthesis temperature of composite powder with La2O3 was 50 ℃lower than that of the mixture without La2O3.

关 键 词:粉煤灰 碳热还原反应 AL2O3-SIC LA2O3 

分 类 号:TB332[一般工业技术—材料科学与工程]

 

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