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Comparison of sol-gel and co-precipitation methods on the structural properties and phase transformation of γ and α-Al2O3 nanoparticles

Comparison of sol-gel and co-precipitation methods on the structural properties and phase... The nanostructured γ and α alumina powders were synthesized by sol-gel and co-precipitation methods, and properties of the powders were studied by XRD, SEM, TEM, BET and FTIR. The results showed that both γ and α phases were formed in the lower temperature in precipitation method compared to sol-gel. The size of spherical α-alumina synthesized by sol-gel was 10–15 nm, whereas the sample prepared by co-precipitation yielded nearly spherical and hexagon α-powder with particle size of 10–50 nm. At 750 °C the resulting powder prepared by co-precipitation exhibited larger surface area (206.2 m2/g) compared to sol-gel (30.72 m2/g), hence it is recommended for catalytic and sensing applications. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Advances in Manufacturing Springer Journals

Comparison of sol-gel and co-precipitation methods on the structural properties and phase transformation of γ and α-Al2O3 nanoparticles

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References (60)

Publisher
Springer Journals
Copyright
Copyright © 2013 by Shanghai University and Springer-Verlag Berlin Heidelberg
Subject
Engineering; Manufacturing, Machines, Tools; Control, Robotics, Mechatronics; Nanotechnology and Microengineering
ISSN
2095-3127
eISSN
2195-3597
DOI
10.1007/s40436-013-0018-1
Publisher site
See Article on Publisher Site

Abstract

The nanostructured γ and α alumina powders were synthesized by sol-gel and co-precipitation methods, and properties of the powders were studied by XRD, SEM, TEM, BET and FTIR. The results showed that both γ and α phases were formed in the lower temperature in precipitation method compared to sol-gel. The size of spherical α-alumina synthesized by sol-gel was 10–15 nm, whereas the sample prepared by co-precipitation yielded nearly spherical and hexagon α-powder with particle size of 10–50 nm. At 750 °C the resulting powder prepared by co-precipitation exhibited larger surface area (206.2 m2/g) compared to sol-gel (30.72 m2/g), hence it is recommended for catalytic and sensing applications.

Journal

Advances in ManufacturingSpringer Journals

Published: May 11, 2013

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