ICCAS OpenIR
Preparation of fine alpha-Al2O3 powders by calcining carbon-covered gamma-Al2O3 in oxygen
Wang Pei1,2; Lin Li1; Zhu Yue-Xiang1; Xie You-Chang1
2008-09-01
Source PublicationJOURNAL OF INORGANIC MATERIALS
ISSN1000-324X
Volume23Issue:5Pages:996-1000
AbstractA new method for the preparation of fine alpha-Al2O3 powders was reported. C/gamma-Al2O3 composites were prepared by carbonizing starch/gamma-Al2O3 precursors. Calcining the composites under oxygen flow in a furnace at 800 degrees C, rapid and total transformation gamma-Al2O3 to alpha-Al2O3 occured when the carbon content was between 6wt%-13wt%. Characterized by N-2 adsorption technique and SEM observation, the particle size of the as-prepared alpha-Al2O3 powders is about 2 mu m. By this method, gamma-Al2O3 can be transformed in very short time of about several minutes to alpha-Al2O3 at 800 degrees C, which isw much lower than the temperature for the commercial preparation. The method is very efficient for the rapid prepartion of fine alpha-Al2O3 powders. And the simple operation and cheap raw materials for the method show that it is very promising for industrial applications.
KeywordFine Alpha-al2o3 Powders Starch C/gamma-al2o3 Composite
Indexed BySCI
Language英语
WOS IDWOS:000259690600026
PublisherSCIENCE CHINA PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/65476
Collection中国科学院化学研究所
Corresponding AuthorWang Pei
Affiliation1.Peking Univ, Coll Chem & Mol Engn, State Key Lab Struct Chem Unstable & Stable Speci, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China
2.China Acad Engn Phys, Inst Chem Mat, Mianyang 621900, Peoples R China
Recommended Citation
GB/T 7714
Wang Pei,Lin Li,Zhu Yue-Xiang,et al. Preparation of fine alpha-Al2O3 powders by calcining carbon-covered gamma-Al2O3 in oxygen[J]. JOURNAL OF INORGANIC MATERIALS,2008,23(5):996-1000.
APA Wang Pei,Lin Li,Zhu Yue-Xiang,&Xie You-Chang.(2008).Preparation of fine alpha-Al2O3 powders by calcining carbon-covered gamma-Al2O3 in oxygen.JOURNAL OF INORGANIC MATERIALS,23(5),996-1000.
MLA Wang Pei,et al."Preparation of fine alpha-Al2O3 powders by calcining carbon-covered gamma-Al2O3 in oxygen".JOURNAL OF INORGANIC MATERIALS 23.5(2008):996-1000.
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