Han, KR Lim, CS Hong, MJ Jang, JW Hong, KS 2024-01-21T14:11:40Z 2024-01-21T14:11:40Z 2021-09-01 2000-04 0002-7820 https://pubs.kist.re.kr/handle/201004/141499 A method is introduced to prepare almost-spherical submicrometer-sized or-alumina via surface modification of gamma-alumina with an alumina sol, Milled gamma-alumina, in the presence of 3 wt% of alpha-alumina with a median particle size (d(50)) of 0.32 mu m (AKP-30), produced irregularly shaped alpha-alumina with d(50) approximate to 0.3 mu m after heat treatment at 1100 degrees C for 1 h. gamma-alumina that had been surface-modified by milling in the presence of 3 wt% of the alumina sol resulted in almost-monosized, spherical a-alumina similar to 0.3 mu m in size after heat treatment at 1100 degrees C for 1 h, Furthermore, almost-spherical or-alumina 0.1-0.2 mu m in size was obtained by milling gamma-alumina with 3 wt% of AKP-30 alumina in the presence of 3 wt% of the alumina sol, followed by heat treatment at 1100 degrees C for 1 h, The alumina sol that has been introduced in this work seems to act as a dispersant, in addition to helping to form a spherical shape. English AMER CERAMIC SOC SEEDED BOEHMITE GELS TRANSFORMATION ALPHA-AL2O3 Preparation method of submicrometer-sized alpha-alumina by surface modification of gamma-alumina with alumina sol Article 1 JOURNAL OF THE AMERICAN CERAMIC SOCIETY, v.83, no.4, pp.750 - 754 JOURNAL OF THE AMERICAN CERAMIC SOCIETY 83 4 750 754 scie scopus 000086506800011 2-s2.0-0033890886 Materials Science, Ceramics Materials Science Article SEEDED BOEHMITE GELS TRANSFORMATION ALPHA-AL2O3 α -alumina