Soft Solution Processing for the Synthesis of Alumina Nanoparticles in the Presence of Glucose

被引：25

作者：

Naskar, Milan Kanti ^{[1
]}

机构：

[1] CSIR, Cent Glass & Ceram Res Inst, Sol Gel Div, Kolkata 700032, India

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2010年 / 93卷 / 05期

关键词：

HYDROTHERMAL SYNTHESIS; PHASE-TRANSFORMATION; BOEHMITE; ALPHA-AL2O3; COMBUSTION; POWDERS;

D O I：

10.1111/j.1551-2916.2009.03555.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Alumina nanoparticles were synthesized following hydrothermal process at 170 degrees C for 6 h, using glucose and other water-based precursor materials. The uncalcined and calcined (550 degrees-1200 degrees C) particles were characterized by differential thermal analysis, thermogravimetry, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and multipoint Brunauer-Emmett-Teller (BET) surface area. The microstructures of the calcined (at 550 degrees C) particles were examined by field-emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). XRD and FTIR studies revealed that gamma-alumina (gamma-Al2O3) persisted up to 1000 degrees C followed by the appearance of alpha-alumina (alpha-Al2O3) at 1200 degrees C. BET surface area analysis confirmed that the specific surface area of gamma-Al2O3 was higher compared with alpha-Al2O3. Because of particle agglomeration, the crystallite sizes obtained by the BET method showed larger values than those determined by the XRD method for the samples calcined at 550 degrees-1200 degrees C. For 550 degrees C-treated sample, FESEM micrograph showed the aggregated particles of size 20-80 nm, while TEM image of the same sample revealed a particle size of 5-10 nm.

引用

页码：1260 / 1263

页数：4

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