Solid state demixing in Bi{sub 2}Se{sub 3}-Bi{sub 2}Te{sub 3} and Bi{sub 2}-Se{sub 3}-In{sub 2}Se{sub 3} phase diagrams

Journal Article · Thu Feb 01 04:00:00 EST 1996 · Materials Research Bulletin

OSTI ID:215330

Ghoumari Bouanani, H; Eddike, D; Liautard, B; Brun, G ^[1]

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1. Univ. Montpellier 2 (France)

The Bi{sub 2}Te{sub 3}-Bi{sub 2}Se{sub 3} and Bi{sub 2}Se{sub 3}-In{sub 2}Se{sub 3} systems were studied by differential thermal analysis and X-ray powder diffraction. The phase diagrams of these systems were constructed; they are quasi-binary. In both cases, there are wide ranges of solid solutions based on the terminal compounds and an intermediate range of demixing. The solid solutions are of tetradymite type (rhombohedral R{bar 3}m). Their limits are related to the substitution of the selenium-tellurium and bismuth-indium atoms in the layers. Electrical conductivity and thermoelectric power measurements confirm the boundaries of the solid solution regions deduced from the thermal and X-ray diffraction data.

• OSTI ID: 215330
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 2 Vol. 31; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH SELENIDES
BISMUTH TELLURIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
DIFFERENTIAL THERMAL ANALYSIS
HEXAGONAL LATTICES
INDIUM SELENIDES
LATTICE PARAMETERS
LAYERS
PHASE DIAGRAMS
SOLID SOLUTIONS
TRIGONAL LATTICES
X-RAY DIFFRACTION