ALUMINA IN FORM SPHERICAL NON-AGGREGATED PARTICLES HAVING NARNOW SIZE DISTRIBUTION AND SIZE BELOW 2 MICRONS AND PROCESS FOR PREPARING SAME

摘要

Alpha alumina consisting essentially of solid, spherical, non- aggregated particles, is characterized by having a number average diameter from 0.06 to 2 micro meter, a polydispersion index dw/dn less than or equal to 2.0 wherein dw is the weight average diameter and dn is the number average diameter, a total porosity of micro/meso type of less than 0.3 cc/g, a specific surface area from 0.7 to 80 meter power 2/g, and an apparent density of the particles of from 3.2 to 3.94 g/Cm power 3.