TY - JOUR
T1 - Enhanced Densification of Boehrmte Sol‐Gels by α‐Alumina Seeding
AU - Kumagai, Masato
AU - Messing, Gary L.
PY - 1984/11
Y1 - 1984/11
N2 - Boehmite sol‐gels were seeded by adding <2.0 wt%α‐alumina powder to a 20% boehmite hydrosol at pH =3. The seeded gel sintered to 98% of theoretical density after 100 min at 1200°C, whereas the unseeded gel had to be sintered at 1600°C to reach 94% of theoretical density. This difference results primarily from nucleation by the α‐alumina seeds and enhanced transformation of the boehmite to α‐alumina, such that a uniform, well‐ordered, fine‐grained α‐alumina micro‐structure forms prior to densification.
AB - Boehmite sol‐gels were seeded by adding <2.0 wt%α‐alumina powder to a 20% boehmite hydrosol at pH =3. The seeded gel sintered to 98% of theoretical density after 100 min at 1200°C, whereas the unseeded gel had to be sintered at 1600°C to reach 94% of theoretical density. This difference results primarily from nucleation by the α‐alumina seeds and enhanced transformation of the boehmite to α‐alumina, such that a uniform, well‐ordered, fine‐grained α‐alumina micro‐structure forms prior to densification.
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U2 - 10.1111/j.1151-2916.1984.tb19491.x
DO - 10.1111/j.1151-2916.1984.tb19491.x
M3 - Article
AN - SCOPUS:84987265490
SN - 0002-7820
VL - 67
SP - c230-c231
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 11
ER -