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A Study of Structural Properties of the TiO2-NbO2 Solid Solution by Neutron Diffraction

Published online by Cambridge University Press:  28 February 2011

Hisao Yamada ,
Raymond G. Teller  and
Inho Song
Hisao Yamada
Affiliation:
BP Research International, Research Center Warrensville, 4440 Warrensville Center Road,Cleveland, Ohio 44128
Raymond G. Teller
Affiliation:
BP Research International, Research Center Warrensville, 4440 Warrensville Center Road,Cleveland, Ohio 44128
Inho Song
Affiliation:
Case Western Reserve University, Dept. of Materials Science and Engineering, Cleveland, Ohio 44106
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Abstract

The structural properties of the TiO2 - NbO2 solid solution have been investigated experimentally by the time—oi—flight neutron diffraction method. It is found that 1) the position parameter for oxygen ions decreases linearly with increasing Nb concentration, 2) the four short metal—oxygen distances increaselinearly with increasing Nb concentration, while the two long distances remain constant,3) the metal—oxygen—metal bond angle,α, exhibits a noticeable deviation from that found in rutile at low Nb concentration, 4) Nb4+ occupy both rgular cation and octahedral interstitial sites at low Nb concentration, but Ti44 ions are increasingly squeezed out from the regular cation sites to octahedral and tetrahedral interstitial sites at Nb concentrations higher than 30 mole%.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 138: Symposium Q – Characterization of the Structure and Chemistry of Defects in Materials , 1988 , 185
Copyright
Copyright © Materials Research Society 1989

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