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Concentration Dependent Diffusion Of H In Tio2 Analysis Of Electronic Effects In Ionic Diffusion

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Concentration Dependent Diffusion Of H In Tio2 Analysis Of Electronic Effects In Ionic Diffusion

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Author : O. W. Johnson
language : en
Publisher:
Release Date : 1974

Concentration Dependent Diffusion Of H In Tio2 Analysis Of Electronic Effects In Ionic Diffusion written by O. W. Johnson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with categories.

Diffusion of charged impurities or defects in a non-metallic crystal generally results in changes in the electron Fermi level relative to the lattice energy bands and impurity levels, thus producing substantial internal electric fields. These fields in turn exert a force on the diffusing ion, hence modifying the diffusion process. A self-consistent treatment describing such diffusion processes in materials with band gap = or> 1.5 eV is developed. The problem of interdiffusion of two similar ions (as in an isotope exchange experiment) is also analyzed. Detailed calculations for both single ion diffusion and interdiffusion of H and D in TiO2 are presented. Experiments leading to accurate determination of the field-free diffusion parameters for H in TiO2, both by the isotope exchange technique and by ionic conductivity measurements, are reported. In addition, single diffusion measurements have been carried out. Criteria for applicability of our analysis are discussed, as well as the relationship of this analysis to previous, more restricted treatments of the internal field problem. (Modified author abstract).

Mass Transport Phenomena In Ceramics

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Author : A. Cooper
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Mass Transport Phenomena In Ceramics written by A. Cooper and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Technology & Engineering categories.

Diffusion And Defects In Tio2

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Author : David J. Fisher
language : en
Publisher: Trans Tech Publications Ltd
Release Date : 2013-08-30

Diffusion And Defects In Tio2 written by David J. Fisher and has been published by Trans Tech Publications Ltd this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-08-30 with Technology & Engineering categories.

Zinc oxide, already used millennia ago as a medicine and as an adjunct to brass production, has assumed a new importance in the modern world because of its native n-type semiconducting properties. It has, for instance, a relatively large (3.3eV) band-gap at room temperature. This leads to higher breakdown voltages, resistance to high electric fields, lower electronic noise and superior performance at high temperatures and powers. The band-gap can also be tailored by alloying with magnesium or cadmium oxides. The material exhibits other useful properties, such as a good transparency, a high electron mobility and a strong room-temperature luminescence; all of which are invaluable to the manufacture of the liquid-crystal displays of modern consumer goods. The present compilation comprises nearly 500 accounts of research on the diffusional behaviour of dopants and on the defects present in the wurtzite or zincblende structures. It is hoped that this handy compendium of data will be of value to those working on the tailoring of ZnO properties; especially with regard to the controversies concerning its doping behaviour.

Bulletin

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Author : Calcutta. Central Glass and Ceramic Research Institute
language : en
Publisher:
Release Date : 1976

Bulletin written by Calcutta. Central Glass and Ceramic Research Institute and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Ceramics categories.

Bulletin Central Glass And Ceramic Research Institute

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Author : Central Glass and Ceramic Research Institute (Calcutta, India).
language : en
Publisher:
Release Date : 1976

Bulletin Central Glass And Ceramic Research Institute written by Central Glass and Ceramic Research Institute (Calcutta, India). and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Ceramics categories.

Devoted to the cause of the advancement of glass, ceramics and allied sciences and industries.