| A Novel Method of Preparing Hexagonal Ordered Porous
Alumina and Analyzing the Formation Mechanism |
Shuaibo Gao,1 Lamei Li,2 Shuai Wang,1 Shu Yan,1 Pengfei Xing,1, * Xin Li1 and Jian Kong1
Pages : 239-243
DOI : 10.1080/0371750X.2020.1831403 |
| Abstract |
| In this paper, a novel method of preparing porous alumina with alumina
powder and boric acid is firstly proposed and experimented, and its
mechanism of the fabricating process is also investigated. Unlike traditional
methods of manufacturing porous alumina including electrochemical
anodization of aluminium and chemical etching, ordered porous alumina
has been directly fabricated through synthesis and decomposition reactions
between boric acid and alumina. Scanning electron microscopic (SEM)
analysis has verified the formation of hexagonal ordered porous alumina
with a homogeneous and mean diameter of ~1 m after sintering at high
temperatures. Transmission electron microscopy (TEM) and X-ray diffraction
(XRD) results show that the main component of the structure is pure alumina
and no other impurities are detected, indicating an excellent corrosion
resistance of the as-received product. Nano-hardness analysis shows a
certain mechanical strength of the microstructure.
[Keywords: Alumina, Porous/Porosity, Porous materials, Metallurgy] |
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