公开(公告)号：ZA200904831B

公开(公告)日：2010-04-28

申请号：ZA200904831

申请日：2009-07-09

Applicant: SAINT GOBAIN CERAMICS

Inventor： BAUER RALPH ,  HAERLE ANDREW G ,  YENER DORUK O ,  THERON CLAIRE ,  KAVANAUGH MICHAEL D

IPC: C01F20100101

Abstract: Processes for forming ceramic particulate material. The ceramic particulate material includes alumina particles, the particles having a specific surface area (SSA) not less than 15 m2/g and not greater than 75 m2/g and a sphericity quantified by at least one of (i) a mean roundness not less than 0.710 as measured by Roundness Correlation Image Analysis, and (ii) a concavity less than 20%, wherein concavity is the percent of alumina particles based on a sample of at least 100 particles, which have a concave outer peripheral portion that extends along a distance not less than 10% of d50 by TEM inspection, the concave outer peripheral portion having a negative radius of curvature as viewed from an interior of the particle.