Accession Number : AD0701767

Title :   DEFECT INTERACTIONS AND RELAXATION PHENOMENA ASSOCIATED WITH ELECTRONIC MOTION IN SEMICONDUCTING CERAMICS.

Descriptive Note : Final rept. 1 Jun 65-30 Apr 69,

Corporate Author : NORTHWESTERN UNIV EVANSTON ILL DEPT OF MATERIALS SCIENCE

Personal Author(s) : Bauer,C. ; Stiglich,J. J. , Jr. ; Whitmore ,D. H.

Report Date : DEC 1969

Pagination or Media Count : 206

Abstract : Studies of the defect structures and mass transport in alkali halides and nonstoichiometric compounds are reported. Some regular solution statistical mechanical treatments were used to quantitatively predict the pairwise interaction energies between nearest-neighbor point defects in metal-excess, nonstoichiometric compounds. The ionic conductivity of pure and doped NaF was measured over a wide range of temperature and these results were analyzed by a nonlinear least-square method to yield the usual defect parameters. Interdiffusion and defect structure measurements on NiO + CoO solid solutions were carried out at elevated temperatures with the aid of appropriate x-ray methods. The diffusion observations are rationalized on the basis of the equilibrium defect structure inferred from integrated x-ray intensity data on these oxide solid solutions. (Author)

Descriptors :   (*ALKALI METAL COMPOUNDS, ELECTRICAL CONDUCTIVITY), (*SOLID SOLUTIONS, *CRYSTAL DEFECTS), (*IONS, MOBILITY), COBALT COMPOUNDS, NICKEL COMPOUNDS, SODIUM COMPOUNDS, FLUORIDES, OXIDES, STATISTICAL MECHANICS, SEMICONDUCTORS

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE