Preparation Method of Submicrometer-Sized α-Alumina by Surface Modification of γ-Alumina with Alumina Sol

• Published in: Journal of the American Ceramic Society Vol. 83; no. 4; pp. 750 - 754
• Main Authors: Han, Kyoung R., Lim, Chang Sup, Hong, Mee-Jeong, Jang, Jin Wook, Hong, Kug Sun
• Format: Journal Article
• Language: English
• Published: Westerville, Ohio American Ceramics Society 01.04.2000; Blackwell; Wiley Subscription Services, Inc
• Subjects: alumina; Chemistry; Colloidal state and disperse state; Exact sciences and technology; General and physical chemistry; Powders; surface; Scanning electron microscopy; Transmission electron microscopy; Preparation; Spherical particle; Alumina; X ray diffraction; Powder; Colloidal sol; Calcining; Modified material; Submicron particle

A method is introduced to prepare almost‐spherical submicrometer‐sized α‐alumina via surface modification of γ‐alumina with an alumina sol. Milled γ‐alumina, in the presence of 3 wt% of α‐alumina with a median particle size (d50) of 0.32 μm (AKP‐30), produced irregularly shaped α‐alumina with d50∼0....