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DOE OSTI2020

Materials Data on B13C2 by Materials Project

B13C2 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. there are three inequivalent B sites. In the first B site, B is bonded in a linear geometry to two equivalent C atoms. Both B–C bond lengths are 1.44 Å. In the second B site, B is bonded in a single-bond geometry to three equivalent B and one C atom. There is one shorter (1.79 Å) and two longer (1.82 Å) B–B bond length. The B–C bond length is 1.61 Å. In the third B site, B is bonded in a 6-coordinate geometry to six B atoms. There is one shorter (1.77 Å) and two longer (1.79 Å) B–B bond length. C is bonded to four B atoms to form corner-sharing CB4 trigonal pyramids.

36 MATERIALS SCIENCE↗

NASA NTRS1983

Present state of boron-carbon thermoelectric materials

Boron-carbon p-type thermoelectric materials show promise for use in advanced thermal-to-electric space power conversion systems. Here, recent data on the thermoelectric properties of boron-carbon materials, such as B9C, B13C2, B15C2, and B4C, are reviewed. In particular, attention is given to the effect of the compositional homogeneity and residual impurity content on the Seeback coefficient, electrical resistivity, and thermal conductivity of these materials. The effect of carbon content for a given level of impurity and degree of homogeneity is also discussed.

Elsner, N. B.↗