On the Electrical Properties of Polycrystalline Boron

概要

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Several specimens of polycrystalline boron, which have various electrical conductivities at room temperature, ranging from 8 (ohm cm)^<-1> to 5 × 10^<-3> or less, were obtained by reduction of distilled boron tribromide. The spectroscopic analysis and the observation by the Debye-Scherrer X-ray pattern were carried out. Some evidence was obtained showing that the conductivity at room temperature may not increase with the amount of impurities but it depends rather on the difference in the crystal structure. Assuming a simple model, carrier concentration and mobility were estimated from the data of conductivity and thermoelectric power. The result was that the carrier concentration may be nearly constant over the range from 100 to 1000°K and that the mobility may vary exponentially with the reciprocal of absolute temperature.
社団法人日本物理学会の論文
1958-07-05