| 544 | 49 | 42 |
| 下载次数 | 被引频次 | 阅读次数 |
研究了用螺旋通道型旋转床超重力碳分法在不同工艺条件下分别制备出了纳米氢氧化铝和纳米纤维状拟薄水铝石,所用原料为NaAlO2-CO2。分析了氢氧化铝纳米颗粒间形成团聚的机理,在沉淀过程中添加表面活性剂和采用异丁醇共沸蒸馏干燥工艺,有效地防止了粉体的团聚。用透射电镜、Brunauer-Emmett-Teller法对产品进行了分析表征。结果表明:用超重力碳分法可以制得纤维状的超细拟薄水铝石,其孔容为2.41ml/g,比表面积为351.6m2/g,平均孔径为28.4nm,粒径为5～10nm。焙烧后可得到孔容高达1.48ml/g,粒径约为10nm的纤维状氧化铝粉末。
Abstract：Nanosized fiber-pseudoboehmite and aluminum hydroxide powder were prepared by the carbonation method in a rotating bed with Helix channels using sodium aluminates solution and carbon dioxide as materials in different process conditions.Mechanism of alumium hydroxide agglomeration nanometer powder was analyzed.Agglomeration nano-meter powder was effetively prevented by adding surface active agent in precipitation process and azeotropic distillation with additive isobutanol.The sample preparaed was characterized by transform electron microscopy and Brunauer-Emmett-Teller.The results show that the prepared particles are a pseudo-bohmite with nano-fiber-like structure,and with a pore volume of 2.41 ml/g,a specific surface area of 351.6 m2/g,an average pore diameter of 28.4 nm,and an average diameter 5—10 nm.After calcination the pseudo-bohmite particles transfer to the fiber nano-alumina with a pore volume of 1.48 ml/g and an average diameter about 10 nm.
[1]罗玉长.拟薄水铝石结构的演化[J].科学实验,1998,30(2):3-5.LUOYuchang.Scientific Test(in Chinese),1998,30(2):3-5.
[2]SCHMIDT F.New catalyst preparation technologies-observed from an industrial viewpoint[J].Appl Catal,2001,221:15-21.
[3]王凤春,朱兴松,张显友.制备条件对Al(OH)3超细粒子尺寸及分布的影响[J].哈尔滨理工大学学报,2003,8(1):79-81.WANG Fengchun,ZHU Xingsong,ZHANG Xianyou.J Haerbin Univ Sci Tech(in Chinese),2003,8(1):79-81.
[4]李学锋,陈绪煌,周密.氢氧化铝阻燃剂在高分子材料中的应用[J].中国塑料,1999,13(6):80-85.LI Xuefeng,CHEN Xuhuang,ZHOU Mi.Chin Plas(in Chinese),1999,13(6):80-85.
[5]李友凤,周继承,谢放华.螺旋通道型旋转床制备纳米拟薄水铝石的研究[J].硅酸盐通报,2006,25(2):38-41.LI Youfeng,ZHOU Jicheng,XIE Fanghua.Chin Ceram Soc Bull(in Chinese),2006,25(2):38-41.
[6]郑遗凡,李国华,徐铸德.纳米二氧化钛粉体粒径表征研究[J].硅酸盐学报,2004,32(5):642-645.ZHENG Yifan,LI Guohua,XU Zhude.J Chin Ceram Soc(in Chinese),2004,32(5):642-645.
[7]蔡卫权,李会泉,张懿.H2O2沉淀铝酸钠溶液制备大孔容纳米γ-Al2O3纤维粒子[J].化工学报,2004,55(12):1976-1981.CAI Weiquan,LI Huiquan,ZHANG Yi.J Chem Ind Eng(in Chinese),2004,55(12):1976-1981.
[8]李友凤,周继承.活性氧化铝纳米粉末的制备[J].材料导报,2005,19(11):157-159.LI Youfeng,ZHOU Jicheng.Mater Rev(in Chinese),2005,19(11):157-159.
[9]陆胜,方荣利,谢小彬.W/O型微乳液碳化法制备超细氢氧化铝和氧化铝粉体[J].无机盐工业,2003,35(5):18-20.LU Sheng,FANG Rongli,XIE Xiaobin.Inorg Ind(in Chinese),2003,35(5):18-20.
[10]范福康,周全.湿化学法制备BaTiO3超微粉过程中团聚状态的控制[J].火花塞与特种陶瓷,1993(3):17-20.FAN Fude,ZHOU Quan.Spark Plug&Special Ceram(in Chinese),1993(3):17-20.
[11]高艳阳,崔予文,高建峰.Sn02超细粉末制备中粉体团聚的形成及防止[J].华北公学院学报,1996,17(2):124-126.GAO Yanyang,CUI Yuiwen,GAO Jianfeng.J North China Ins Technol(in Chinese),1996,17(2):124-126.
[12]ZHU H Y,RICHES J D,BARRY J Cl.γ-alumina nanofibers prepared from aluminum hydrate with poly(ethylene oxide)surfactant[J].Chem Mater,2002,14(5):2086-2093.
[13]单妍,王昕,于薛刚,等.Al2O3-ZrO2陶瓷体系晶粒生长模型的研究[J].硅酸盐学报,2003,3(3):278-282.SHAN Yan,WANG Xin,YU Xuegang,et al.J Chin Ceram Soc(inChinese),2003,3(3):278-282.
[14]陈志刚,陈彩凤,刘苏.超声场中湿法制备Al2O3纳米粉工艺研究[J].硅酸盐学报.2003,31(2):213-217.CHEN Zhigang,CHEN Caifeng,LIU Su.J Chin Ceram Soc(in Chi-nese),2003,31(2):213-217.
基本信息:
中图分类号:O614.31
引用信息:
[1]李友凤,周继承,廖立民,等.超重力碳分反应沉淀法制备分散性纳米氢氧化铝[J].硅酸盐学报,2006(10):1290-1294.
基金信息:
湖南省科技厅项目(05FJ3053);; 湖南省教育厅优秀青年项目(03B042)资助
2006-10-30
2006-10-30