Synthesis and characterization of alumina nanoparticles by Igepal CO-520 stabilized reverse micelle and sol-gel processing

被引：14

作者：

Chandradass, J. ^{[1
]}

Bae, Dong-Sik ^{[1
]}

机构：

[1] Changwon Natl Univ, Sch Nano & Adv Mat Engn, Gyeongnam 641773, South Korea

来源：

MATERIALS AND MANUFACTURING PROCESSES | 2008年 / 23卷 / 05期

关键词：

Al2O3; ceramics; characterization methods; crystallization; differential thermal analysis; microemulsion; nanopowder; Scanning electron microscopy; sol-gel processing; thermogravimetric analysis; transmission electron microscopy; X-ray diffraction;

D O I：

10.1080/10426910802104211

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanosized alumina powders have been prepared via reverse micelle and sol-gel processing. By stepwise hydrolysis using aqueous ammonia as the precipitant, hydroxide precursor was obtained from nitrate solutions dispersed in the nanosized aqueous domains of microemulsion consisting of cyclohexane as the oil phase, poly(oxyethylene) nonylphenyl ether (Igepal CO-520) as the non-ionic surfactant, and an aqueous solution containing aluminium nitrate as the water phase. The synthesized and calcined powders were characterized by thermogravimetry-differential thermal analysis, transmission electron microscopy, and scanning electron microscopy. The XRD analysis showed that the complete transformation from gamma-Al2O3 nanocrystalline to alpha-Al2O3 was observed at 1100 degrees C. The resulting alumina nanopowder exhibits particle agglomerates of 135-200nm in average diameter occur when they calcined at 1200 degrees C. The average particle size was found to increase with increase in water to surfactant (R) molar ratio.

引用

页码：494 / 498

页数：5

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