Thermal Conductivity Behavior of Boron Carbides

  • Charles Wood
  • Andrew Zoltan
  • David Emin
  • Paul E. Gray


Knowledge of the thermal conductivity of boron carbide is necessary to evaluate its potential for high temperature thermoelectric energy conversion applications. We have measured the thermal diffusivity of hot-pressed boron carbide B1-xCx samples as a function of composition (0.1 ≤ x ≤ 0.2), temperature (300 K to 1700 K) and temperature cycling. These data in concert with density and specific heat data yield the thermal conductivities of these materials. We discuss these results in terms of a structural model that has been previously advanced by two of us (D.E. and C.W.) to explain the electrical transport data. Some novel mechanisms for thermal conduction are briefly discussed.


Thermal Conductivity Thermal Diffusivity Boron Carbide Thermal Transport Lattice Thermal Conductivity 
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  1. [1]
    Wood, C. and Emin, D., “Conduction Mechanism in Boron Carbide,” Phys. Rev. B 29, No. 8 (1984).CrossRefGoogle Scholar
  2. [2]
    Emin, D. and Wood, C., “Small-Polaron Electronic Transport in Boron Carbides,” Proceedings of the 18th IECEC, 1, 222–225, Orlando, FL, Aug. 22–26 (1983).Google Scholar
  3. [3]
    Deem, H. W. and Lucks, C. F., “Thermal Conductivity of Boron Carbide from 100 C to 800 C,” Battelle Memorial Institute Report No. BMI-731, 1951 (unpublished); Nucl. Sci. Abstr. 6, 915 (1952).Google Scholar
  4. [4]
    Hedge, J. C.; Kostenko, C.; and Lang, J. I., Illinois Institute of Technology Research Institute, Technical Documentary Report Nos. ASD-TDR-63-597 and AD-424375, 1963 (unpublished; see Chem. Abstr. 61, 10433d, 1964 ).Google Scholar
  5. [5]
    Boiko, N. V. and Shpil’rain, E. E., “Some Questions on the Method of Experimentally Studying the Heat Conductivity of Materials at High Temperatures,” Sov. Phys. High Temp. 2, 493–500 (1964)Google Scholar
  6. [6]
    Nuclear Systems Materials Handbook, Vol. 1 Design Data. Part III Group 1 Section 1. p 1.0, 1. 1.Google Scholar
  7. [7]
    Gilchrist, K. E. and Preston, S. D., “Thermophysical Property Measurements on Some Neutron Absorbing Materials,” High Temp.-High Pres. 11, 643–651 (1979).Google Scholar
  8. [8]
    Clark, H. K. and Hoard, J. L., “The Crystal Structure of B4C,” J. Amer. Chem. Soc. 65, 2115 (1943).CrossRefGoogle Scholar
  9. [9]
    Will, G. and Kossobutzki, K. H., “An X-ray Diffraction Analysis of Boron Carbide, J. Less-Comm. Met. 47, 43–48 (1976).CrossRefGoogle Scholar
  10. [10]
    Yakel, H. L., “The Crystal Structure of a Boron-Rich Boron Carbide,” Acta Cryst. B31, 1797–1806 (1975).CrossRefGoogle Scholar
  11. [11]
    Bouchacourt, M. and Thevenot, F., “The Properties and Structure of the Boron Carbide Phase,” J. Less-Comm. Met. 82, 227–235 (1981).CrossRefGoogle Scholar
  12. [12]
    Parker, W. J.; Jenkins, R. J.; Butler, C. P.; and Abbott, G. I., “Flash Method of Determining Thermal Diffusivity, Heat Capacity, and Thermal Conductivity,” J. Appl. Phys. 32, No. 9, 1679–1684 (1961).CrossRefGoogle Scholar
  13. [13]
    Taylor, R. E., “Heat-Pulse Thermal Diffusivity Measurements,” High-Temp.-High Press. 11, 43–58 (1979).Google Scholar
  14. [14]
    Minges, M. L., “Evaluation of Selected Refractories as High Temperature Thermophysical Property Calibration Materials,” Int. J. Heat Mass Transfer, 17, 1365–1382 (1974).CrossRefGoogle Scholar
  15. [15]
    Data supplied by D. Elwell, Stanford University, using a Dupont Differential Scanning Calorimeter.Google Scholar
  16. [16]
    From thermal diffusivity data supplied by R. E. Taylor, Purdue University, and confirmed by JPL, using the flash method. An absolute determination of thermal conductivity by G. Slack, G. E. Research, yielded a fairly temperature independent value of -0.068 ± 0.002 W/K-cm for B0.9C0.1 in the vicinity of room temperature in essential agreement with B0.9C0.1 (20–1).Google Scholar
  17. [17]
    Payton, D. N.; Rich, M.; and Visscher, W. M., “Lattice Thermal Conductivity in Disordered Harmonic and Anharmonic Crystal Models,” Phys. Rev. 160, 706 (1967).CrossRefGoogle Scholar
  18. [18]
    Klemens, P. G., “Thermal Resistance Due to Point Defects at High Temperatures,” Phys. Rev. 119, 507 (1960).CrossRefGoogle Scholar

Copyright information

© Purdue Research Foundation 1985

Authors and Affiliations

  • Charles Wood
    • 1
  • Andrew Zoltan
    • 1
  • David Emin
    • 2
  • Paul E. Gray
    • 3
  1. 1.Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaUSA
  2. 2.Sandia National LaboratoriesAlbuquerqueUSA
  3. 3.GA TechnologiesSan DiegoUSA

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