Abstract
A technology for the glycothermal synthesis of α-Al2O3 particles of controlled size and shape has been developed. This technique allows for the production of anisometrically shaped particles with controlled morphology and size distribution. Morphological control of particle shape is described as a function of reaction conditions in which platelet morphologies are produced at high shear rates and polyhedra are formed at low shear rates. Particle size control is also investigated via the use of seed materials which promote epitaxial growth, thereby reducing the surface energy contribution to the nucleation barrier. α-Al2O3 seed materials can be used to form particle sizes as small as 100-200 nm without agglomeration. α-Fe2O3 seeds have similar effects in comparison with the α-Al2O3 seeds, but require higher values of seed number concentration to achieve equivalent particle size effects. Morphological control is unaffected by seeding additions.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 120-133 |
| Number of pages | 14 |
| Journal | ACS Symposium Series |
| Volume | 681 |
| State | Published - Dec 1 1998 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Chemical Engineering(all)
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High-Temperature Synthesis of Materials : Glycothermal Synthesis of Alpha Aluminum Oxide. / Bell, Nelson S.; Cho, Seung Beom; Adair, James Hansell.
In: ACS Symposium Series, Vol. 681, 01.12.1998, p. 120-133.Research output: Contribution to journal › Article
TY - JOUR
T1 - High-Temperature Synthesis of Materials
T2 - Glycothermal Synthesis of Alpha Aluminum Oxide
AU - Bell, Nelson S.
AU - Cho, Seung Beom
AU - Adair, James Hansell
PY - 1998/12/1
Y1 - 1998/12/1
N2 - A technology for the glycothermal synthesis of α-Al2O3 particles of controlled size and shape has been developed. This technique allows for the production of anisometrically shaped particles with controlled morphology and size distribution. Morphological control of particle shape is described as a function of reaction conditions in which platelet morphologies are produced at high shear rates and polyhedra are formed at low shear rates. Particle size control is also investigated via the use of seed materials which promote epitaxial growth, thereby reducing the surface energy contribution to the nucleation barrier. α-Al2O3 seed materials can be used to form particle sizes as small as 100-200 nm without agglomeration. α-Fe2O3 seeds have similar effects in comparison with the α-Al2O3 seeds, but require higher values of seed number concentration to achieve equivalent particle size effects. Morphological control is unaffected by seeding additions.
AB - A technology for the glycothermal synthesis of α-Al2O3 particles of controlled size and shape has been developed. This technique allows for the production of anisometrically shaped particles with controlled morphology and size distribution. Morphological control of particle shape is described as a function of reaction conditions in which platelet morphologies are produced at high shear rates and polyhedra are formed at low shear rates. Particle size control is also investigated via the use of seed materials which promote epitaxial growth, thereby reducing the surface energy contribution to the nucleation barrier. α-Al2O3 seed materials can be used to form particle sizes as small as 100-200 nm without agglomeration. α-Fe2O3 seeds have similar effects in comparison with the α-Al2O3 seeds, but require higher values of seed number concentration to achieve equivalent particle size effects. Morphological control is unaffected by seeding additions.
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M3 - Article
AN - SCOPUS:0345867431
VL - 681
SP - 120
EP - 133
JO - ACS Symposium Series
JF - ACS Symposium Series
SN - 0097-6156
ER -