Chemical diffusion in intermediate phases in the lithium-silicon system. [415/sup 0/C]

Journal Article · Fri May 01 00:00:00 EDT 1981 · J. Solid State Chem.; (United States)

DOI:https://doi.org/10.1016/0022-4596(81)90487-4· OSTI ID:6458593

Wen, C J; Huggins, R A

The equilibrium coulometric titration curve shows four intermediate phases in the Li-Si system at 415/sup 0/C. The nominal compositions for these phases are Li/sub 12/Si/sub 7/, Li/sub 7/Si/sub 3/, Li/sub 13/Si/sub 4/, and Li/sub 22/Si/sub 5/, respectively. They all have quite narrow ranges of homogeneity. The compositional variations of the chemical diffusion coefficients within the various intermediate phases are similar to each other and closely resemble those of the thermodynamic enhancement factor for each phase. The chemical diffusion coefficients across all four intermediate phase are essentially of the same order, about 6.0 x 10/sup -5/ cm/sup 2//s at 415/sup 0/C. 9 figures.

• Research Organization: Stanford Univ., CA
• DOE Contract Number: EC-77-S-02-4506
• OSTI ID: 6458593
• Journal Information: J. Solid State Chem.; (United States), Vol. 37:3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
LITHIUM ALLOYS
PHASE STUDIES
SILICON ALLOYS
DIFFUSION
HIGH TEMPERATURE
LITHIUM SILICIDES
THERMODYNAMIC PROPERTIES
VOLTAMETRY
ALKALI METAL COMPOUNDS
ALLOYS
LITHIUM COMPOUNDS
PHYSICAL PROPERTIES
SILICIDES
SILICON COMPOUNDS
360102* - Metals & Alloys- Structure & Phase Studies