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柠檬酸在Sol-gel制备Al₂O₃/Mo混合粉体过程中的作用

Analysis on Effects of Citric Acid on Preparation of Al₂O₃ / Mo Powder by Sol-gel Method

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【Author】 HOU Fengliang1,NI Feng1,XU Liujie2,LI Wei3(1.School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471003,China;2.Henan Engineering Research Center for Wear of Materials,Henan University of Science and Technology,Luoyang 471003,China;3.Luoyang Hi-tech Molybdenum & Tungsten Material Company,Luoyang 471003,China)

【机构】河南科技大学材料科学与工程学院；河南科技大学河南省耐磨材料工程技术研究中心；洛阳高科钼钨材料有限公司；

【摘要】采用溶胶凝胶法和二次还原工艺成功制备了Al2O3/Mo超细粉末,利用XRD、SEM对还原后不同柠檬酸添加量的粉末相的结构、形貌、粒度进行了分析,并结合实验结果,阐述了柠檬酸在粉体制备过程中的作用机理。结果表明,在溶液pH<2,柠檬酸与钼酸铵质量比为1.5时,所得粉体质量较好。更多还原

【Abstract】 Ultrafine Al2O3/Mo mixture powders were successfully prepared by sol-gel and secondary deoxidation techniques.The phase structure,morphology and size of the powders were analyzed by XRD and SEM.Meanwhile,the mechanism of citric acid in the preparation of the powder was expounded.The results show that the better quality of powders are obtained under the conditions of pH<2 and mass ratio(citric acid and ammonium molybdate) about 1.5.更多还原