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Phase Transformations in Titanium Oxide Evaporated Films by Annealing

Published online by Cambridge University Press:  21 February 2011

Y. Yamada ,
K. Yoshida ,
H. Ota ,
Shen Guang Jun ,
L. A. Bursill  and
A. E. C. Spargo
Y. Yamada
Affiliation:
College of General Education, Tohoku University, Kawauchi, Sendai 980, Japan;
K. Yoshida
Affiliation:
College of General Education, Tohoku University, Kawauchi, Sendai 980, Japan;
H. Ota*
Affiliation:
College of General Education, Tohoku University, Kawauchi, Sendai 980, Japan;
Shen Guang Jun*
Affiliation:
College of General Education, Tohoku University, Kawauchi, Sendai 980, Japan;
L. A. Bursill*
Affiliation:
College of General Education, Tohoku University, Kawauchi, Sendai 980, Japan;
A. E. C. Spargo*
Affiliation:
College of General Education, Tohoku University, Kawauchi, Sendai 980, Japan;
*
*1MV Electron Microscopic Laboratory, Tohoku University, Katahira, Sendai 980, Japan;
**School of Physics, University of Melbourne, Parkville 3052, Australia
**School of Physics, University of Melbourne, Parkville 3052, Australia
**School of Physics, University of Melbourne, Parkville 3052, Australia
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Abstract

The process of the phase transformation of evaporated films of TiO0.5 has been demonstrated by in situ annealing using an electron microscope. Single crystals of the δ-phase, whose structure is identified with Andersson's hexagonal model, precipitate during annealing. Crystal structure images in cooperation with the calculated images reveal that the inner parts of the δ-phase crystal have various thickness. The transition structures I and II having ordered vacancies of titanium and oxygen respectively also appear on annealing. The difference in the distortion of their lattices from the parent rock-salt type lattice suggests that the effective atomic volume of titanium is larger than that of oxygen in the crystal of the transition structure. The observed transformations, α-phase → δ ;phase → transition structure, are explained by consideration of the structural relationships among these phases.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 21: Symposium GREECE – Phase Transformations in Solids , 1983 , 155
Copyright
Copyright © Materials Research Society 1984

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References

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