Oxygen diffusion in single crystal yttrium aluminum garnet

by: H Haneda, Y Miyazawa, S Shirasaki

Journal of Crystal Growth, Vol. 68, No. 2. (2 September 1984), pp. 581-588.

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diffusion, diffusion-p, garnet, oxygen, tracer, yag

Abstract

Self-diffusion coefficients of oxygen in single crystal yttrium aluminum garnet (YAG) have been measured by the gas-solid isotope exchange technique using 18O as a tracer at temperatures in the range 1060-1550[delta]C. The volume diffusion coefficients of oxygen ions in the as-grown crystal can be expressed by D = 5.24x10-7 exp(- 325000J/mol/RT) m2/s. This coefficient depends on the atmosphere of heat treatment prior to diffusion annealing. This effect on their oxygen vacancy levels is ascribed to both the formation of an F-center-like defect and the valency change of an iron impurity contained. It is considered that this activation energy is due to oxygen ion migration. The oxygen vacancy concentration of a faceted region of single crystal YAG was higher than without facets.

@article{citeulike:1560260, abstract = {Self-diffusion coefficients of oxygen in single crystal yttrium aluminum garnet (YAG) have been measured by the gas-solid isotope exchange technique using 18O as a tracer at temperatures in the range 1060-1550[delta]C. The volume diffusion coefficients of oxygen ions in the as-grown crystal can be expressed by D = 5.24x10-7 exp(- 325000J/mol/RT) m2/s. This coefficient depends on the atmosphere of heat treatment prior to diffusion annealing. This effect on their oxygen vacancy levels is ascribed to both the formation of an F-center-like defect and the valency change of an iron impurity contained. It is considered that this activation energy is due to oxygen ion migration. The oxygen vacancy concentration of a faceted region of single crystal YAG was higher than without facets.}, author = {Haneda, H. and Miyazawa, Y. and Shirasaki, S. }, citeulike-article-id = {1560260}, doi = {http://dx.doi.org/10.1016/0022-0248(84)90465-2}, journal = {Journal of Crystal Growth}, keywords = {diffusion, diffusion-p, garnet, oxygen, tracer, yag}, month = {September}, number = {2}, pages = {581--588}, posted-at = {2007-08-14 14:07:31}, priority = {0}, title = {Oxygen diffusion in single crystal yttrium aluminum garnet}, url = {http://dx.doi.org/10.1016/0022-0248(84)90465-2}, volume = {68}, year = {1984} }

RIS record

TY - JOUR ID - citeulike:1560260 L3 - citeulike-article-id:1560260 TI - Oxygen diffusion in single crystal yttrium aluminum garnet JF - Journal of Crystal Growth VL - 68 IS - 2 SP - 581 EP - 588 N2 - Self-diffusion coefficients of oxygen in single crystal yttrium aluminum garnet (YAG) have been measured by the gas-solid isotope exchange technique using 18O as a tracer at temperatures in the range 1060-1550[delta]C. The volume diffusion coefficients of oxygen ions in the as-grown crystal can be expressed by D = 5.24x10-7 exp(- 325000J/mol/RT) m2/s. This coefficient depends on the atmosphere of heat treatment prior to diffusion annealing. This effect on their oxygen vacancy levels is ascribed to both the formation of an F-center-like defect and the valency change of an iron impurity contained. It is considered that this activation energy is due to oxygen ion migration. The oxygen vacancy concentration of a faceted region of single crystal YAG was higher than without facets. KW - diffusion KW - diffusion-p KW - garnet KW - oxygen KW - tracer KW - yag AU - Haneda, H AU - Miyazawa, Y AU - Shirasaki, S PY - 1984/09/02/ UR - http://dx.doi.org/10.1016/0022-0248(84)90465-2 ER -

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