Transport properties of boron carbide

Journal Article · Tue Apr 15 04:00:00 EST 1986 · AIP Conf. Proc.; (United States)

DOI:https://doi.org/10.1063/1.35596· OSTI ID:5727768

Wood, C

Electrical conductivity, Seebeck-coefficient, and Hall-effect measurements have been made on single-phase microcrystalline boron carbides, B/sub x/C, in the compositional range 4< or =x< or =9 between liq. N/sub 2/ temperature and 2273 K. Thermal cycling effects are also discussed. In addition, conductivity and Seebeck coefficient measurements are reported on a large-grain polycrystal. The results tend to confirm that boron carbide is a degenerate semiconductor in which the predominant conduction mechanism is small-bipolaron hopping between carbon atoms at energetically inequivalent sites in highly disordered structures.

• Research Organization: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109
• OSTI ID: 5727768
• Report Number(s): CONF-850786-
• Journal Information: AIP Conf. Proc.; (United States), Journal Name: AIP Conf. Proc.; (United States) Vol. 140:1; ISSN APCPC
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
&amp; Refractories-- Physical Properties
BORON CARBIDES
BORON COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CRYSTALS
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
FABRICATION
HALL EFFECT
HIGH TEMPERATURE
HOT PRESSING
INFORMATION
LOW TEMPERATURE
MATERIALS
MATERIALS WORKING
MEDIUM TEMPERATURE
NUMERICAL DATA
PHYSICAL PROPERTIES
POLARONS
POLYCRYSTALS
POWDERS
PRESSING
QUASI PARTICLES
SEEBECK EFFECT
SEMICONDUCTOR MATERIALS
THERMAL CYCLING
VERY HIGH TEMPERATURE