Low Temperature Synthesis of Hexagonal Shaped α-Al2O3 Using a Solvothermal Method. (30th December 2012)

• Record Type: Journal Article
• Authors: Kim, A-Young; Kim, Hyun Soo; Park, No-Kuk; Lee, Tae Jin; Lee, Won Gun; Kim, Heun Duk; Park, Jun Woo; Kang, Misook
• Other Names: Zou Jianxin Academic Editor.
• Is Part Of: Journal of nanomaterials. Volume 2012(2012)
• Publication Date: 2012-12-30
• Subjects: Nanostructured materials -- Periodicals; Nanotechnology -- Periodicals; Nanomatériaux; Nanostructured materials; Nanotechnology; Nanostructures; Nanotechnology; Periodicals; Fulltext; Internet Resources; Periodicals; 620.115
• DOI: 10.1155/2012/907503
• Languages: English
• ISSNs: 1687-4110

Abstract

Abstract : This study demonstrates the low temperature synthesis of α -Al2 O3 by solvothermal method using gibbsite alumina precursor in 1, 4-butanediol solvent according to various pH conditions. In acidic solution, an orthorhombic boehmite (AlOOH) structure was obtained after solvothermal reaction. A significant result in this study was that the solvothermally synthesized alumina in pH = 9 at 300 °C for 36 h represented a rhombohedral α -Al2 O3 structure hexagonal shaped with about 1.5 ~ 2.0 μ m of particle size. Otherwise, the α -Al2 O3 structure was rather changed to the mixture of a boehmite and α -Al2 O3 structures above pH = 11 . In the case of α -Al2 O3 synthesized at pH = 9, the specific surface area was 26.18 m 2 /g, and the particles that were stable in acidic solution resulted in 61.80 mV of zeta potential.