CAJ | 학술논문

采用由环己烷、聚乙二醇辛基苯基醚(TritonX-100)、正丁醇与水溶液构成的反相微乳液体系,合成了纳米Al_2O_3粉体.采用X射线衍射、扫描电子显微镜、透射电子显微镜、比表而积分析仪等表征手段,分别对产物的结构、形貌、比表面积和孔容进行了表征,该纳米Al_2O_3比表而积约450 m~2·g~(-1)(随反应参数不同发生变化),均属γ-Al_2O_3,粒径均匀,颗粒直径小于10 nm.考察了微乳液体系中水与表面活性剂的物质的量之比r_0、表面活性剂与助表面活性剂的体积比ψ、焙烧温度等关键因素对产物比表而积等物理性质的影响.结果表明,当r_0=20,ψ=0.5,焙烧温度为500℃时,可以得到大比表面积、高孔容、分散性好及粒径分布均匀的γ-Al_2O_3粉体.
채용유배기완、취을이순신기분기미(TritonX-100)、정정순여수용액구성적반상미유액체계,합성료납미Al_2O_3분체.채용X사선연사、소묘전자현미경、투사전자현미경、비표이적분석의등표정수단,분별대산물적결구、형모、비표면적화공용진행료표정,해납미Al_2O_3비표이적약450 m~2·g~(-1)(수반응삼수불동발생변화),균속γ-Al_2O_3,립경균균,과립직경소우10 nm.고찰료미유액체계중수여표면활성제적물질적량지비r_0、표면활성제여조표면활성제적체적비ψ、배소온도등관건인소대산물비표이적등물이성질적영향.결과표명,당r_0=20,ψ=0.5,배소온도위500℃시,가이득도대비표면적、고공용、분산성호급립경분포균균적γ-Al_2O_3분체.
Al_2O_3 nanoparticles were prepared by reverse microemulsion method that uses cyclohexane, polyethylene glycol octylphenyl ether (TritonX-100), n-butylalcohol, and water. The structure, morphology, and specific surface area of the nano-alumina particles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and specific surface area analysis. The specific surface area of the nano-alumina particles was about 450 m~2·g~(-1) (changing with different reaction parameters) and the crystal structure was γ-Al_2O_3. The particle size was smaller than 10 nm and very uniform. The effect of molar ratio of water to surfactant (r_0), volume ratio of surfactant to assistant-surfactant (ψ), and calcination temperature (T) on the characteristics of the product were studied. The results indicated that the nano Al_2O_3 powder with a high specific surface area, high pore volume, good dispersibility, and narrow particle size distribution was obtained at r_0=20, ψ=0.5, and T=500℃.