Hydrothermal Synthesis of Petal-Like Alumina Flakes

被引：26

作者：

Naskar, Milan Kanti ^{[1
]}

机构：

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

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2009年 / 92卷 / 10期

关键词：

ALPHA-AL2O3; NANOFIBERS; HYDROLYSIS; NANOTUBES;

D O I：

10.1111/j.1551-2916.2009.03181.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：

Petal-like alumina flakes were prepared by hydrothermal reaction at 170 degrees C for 6 h with aqua-based precursor materials. The gel particles were calcined at 550 degrees-1200 degrees C. The gel and calcined particles were characterized by differential thermal analysis (DTA), thermogravimetry (TG), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), multipoint Brunauer-Emmett-Teller (BET) surface area, and field emission scanning electron microscopy (FESEM). Crystallization of alumina was confirmed by DTA and XRD studies. XRD results showed that boehmite particles were formed in as-prepared sample while gamma-alumina (gamma-Al2O3) persisted up to 800 degrees C followed by the appearance of h-alumina (theta-Al2O3) at 1000 degrees-1200 degrees C. The characteristics Al-O vibrations in alumina polymorphs were examined by FTIR study. FESEM confirmed the formation of petal-like alumina flakes with the assembly of alumina nanorods.

引用

页码：2392 / 2395

页数：4

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