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Diffusion in Solids via Nuclear Track Analysis
Author(s) -
CopeAnderson Rachel,
Thornson William J.,
Filby Royston
Publication year - 1990
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1990.tb09839.x
Subject(s) - diffusion , lithium hydroxide , sodium hydroxide , lithium (medication) , hydroxide , materials science , lithium carbonate , pellets , grain boundary diffusion coefficient , etching (microfabrication) , analytical chemistry (journal) , chemistry , inorganic chemistry , composite material , thermodynamics , grain boundary , chromatography , microstructure , layer (electronics) , medicine , ion , physics , organic chemistry , ion exchange , ionic bonding , endocrinology
Nuclear track analysis has been used to follow the diffusion of melted lithium hydroxide in pellets of aluminum oxide as a function of temperature and time. α particle tracks, created by thermal neutrons on an allyl diglycol carbonate monomer film, are visible under a high‐power optical microscope after chemical etching in a sodium hydroxide solution. The number of tracks present at various depths within each pellet is proportional to the concentration of lithium hydroxide. Using a one‐dimensional diffusion model with appropriate boundary conditions, values of the lithium hydroxide diffusion coefficient in the porous pellet have been determined. The diffusion coefficients, as well as their temperature dependency, are consistent with expectations for this type of system and it is concluded that nuclear track analysis is a viable technique for solid‐state diffusion studies in appropriate materials.