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Characteristics of Alumina Powders Prepared by Spray‐Drying of Boehmite Sol
Author(s) -
Varma Hari Krishna,
Mani Themanam Veetil,
Damodaran Alathoor D.,
Warrier Krishna Gopakumar,
Balachandran Uthamalingam
Publication year - 1994
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1994.tb09762.x
Subject(s) - boehmite , spray drying , materials science , sintering , chemical engineering , crystallite , compaction , economies of agglomeration , particle size , dispersity , micrometer , acetone , ceramic , sol gel , particle (ecology) , particle size distribution , mineralogy , aluminium , composite material , metallurgy , nanotechnology , chemistry , organic chemistry , polymer chemistry , physics , oceanography , optics , geology , engineering
Boehmite sol prepared from aluminum nitrate has been spray‐dried to obtain micrometer‐size spherical particles consisting of submicrometer crystallites. The spray‐dried powder was further washed with solvents of varying polarities such as acetone, 2‐propano1, and 2‐methyl‐2‐propanol. Particle‐size distribution, morphology, density, compaction, and sintering characteristics of powders washed with different solvents are reported. The effect of posttreatments on the boehmite‐sol‐derived powders toward reducing agglomeration and obtaining high‐density bodies is discussed.