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Alumina Prepared from Freeze‐Dried Aluminum Isopropoxide
Author(s) -
Chang HsiaoLan,
Lloyd Isabel K.
Publication year - 1993
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.1151-2916.1993.tb03766.x
Subject(s) - calcination , materials science , amorphous solid , chemical engineering , aluminium , sulfate , mineralogy , micrometer , morphology (biology) , metallurgy , chemistry , crystallography , organic chemistry , catalysis , geology , paleontology , physics , optics , engineering
Preliminary experiments show that calcining freeze‐dried aluminum isopropoxide at 300°C produces sinterable amorphous alumina powders. The resultant powders are soft, contain some carbonaceous residue, and have large surface areas (∼100 m 2 /g). On a micrometer size scale, they are similar in morphology to sulfate‐derived materials although their surface areas are smaller (≤100 m 2 /g compared to ≥200 m 2 g for the sulfate‐derived powders). Powders calcined at higher temperatures contain less carbon but are also less sinterable.