Thermoelectric properties of beta-boron and some boron compounds
Abstract
The thermoelectric properties, that is the Seebeck coefficient, and electrical and thermal conductivity, of doped (BETA)-boron have been measured from 300 to 1600 K. Most of the useful doping elements are transition metals and occupy interstitial sites in the lattice. The highest figure of merit so far achieved at 1000 K is ZT = 0.11 for P-type, polycrystalline, hot-pressed (BETA)-boron doped with copper. Higher values may be achievable once a better P-type dopant is found. Some experiments on (B68Y, (ALPHA)-B12AI, B4C, and B6Si are described. Transition metals appear to be effective dopants for B68Y and B4C.
- Publication:
-
Final Report
- Pub Date:
- December 1984
- Bibcode:
- 1984gec..reptR....S
- Keywords:
-
- Activation Energy;
- Additives;
- Aluminum;
- Boron Alloys;
- Boron Compounds;
- Carbon;
- Germanium;
- Polycrystals;
- Silicon;
- Electrical Resistivity;
- Thermoelectricity;
- Transition Metals;
- Electronics and Electrical Engineering