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Fabrication of c-axis oriented polycrystalline ZnO by using a rotating magnetic field and following sintering

Published online by Cambridge University Press:  01 March 2006

Satoshi Tanaka*
Affiliation:
Department of Chemistry, Nagaoka University of Technology, Nagaoka, Niigata 940 2188, Japan
Atsushi Makiya
Affiliation:
Department of Chemistry, Nagaoka University of Technology, Nagaoka, Niigata 940 2188, Japan
Zenji Kato
Affiliation:
Department of Chemistry, Nagaoka University of Technology, Nagaoka, Niigata 940 2188, Japan
Nozomu Uchida
Affiliation:
Department of Chemistry, Nagaoka University of Technology, Nagaoka, Niigata 940 2188, Japan
Tsunehisa Kimura
Affiliation:
Department of Applied Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192 0397, Japan
Keizo Uematsu
Affiliation:
Department of Chemistry, Nagaoka University of Technology, Nagaoka, Niigata 940 2188, Japan
*
a) Address all correspondence to this author. e-mail: stanaka@chem.nagaokaut.ac.jp
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Abstract

We succeeded in fabricating c-axis (00l) oriented ZnO ceramics by using a rotating magnetic field and a subsequent sintering treatment. The degree of orientation in the green compact was about 0.5 along (00l) on the Lotgering scale. The degree of orientation increased to 0.99 after sintering at 1573 K. Particles can also be oriented in a static magnetic field, but along the direction of the a-axis or a,b-axes (h00), (hk0). These results show that selected axes can be oriented by controlling the magnetic field. Control of the crystal form in microstructures is expected to result in improvements in and better miniaturization of functional ceramics.

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Articles
Copyright
Copyright © Materials Research Society 2006

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