DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click
HERE to register or log in.
Accession Number:
AD0610382
Title:
Semiconducting Materials: Part 2 AnInvestigation of the Boron-Phosphorous System
Corporate Author:
NEW YORK STATE COLL OF CERAMICS ALFRED
Report Date:
1965-01-15
Abstract:
Hot-pressing of BP was used to prepare polycrystal line samples in the boron-phosphorous system. Hotpressed samples containing up to 24 carbon were also prepared and their properties analyzed. A study of the effect of hot- pressing variables on composition and properties was made. A comprehensive analysis was made of compounds, phases, compositions, grain size, and impurity content. A series of compositions, including pure B13P2, was examined for Knoop hardness, electrical conductivity, activation energies, thermal conductivity, thermoelectric power, density, Hall effect, and magnetoresistance. The value of hot-pressed samples in the boron-phosphorouscarbon system for thermoelectric applications was measured and reviewed. The electrical conductivity in B13P2 was measured and a mechanism for conduction based on extrinsic levels and a surface effect is proposed. A theoretical model for understanding the physical aspects of this system is presented. Sufficient evidence of the existence of B10P was obtained to warrant further study. A correlation between composition and physical properties was established.
Descriptive Note:
Final rept. Pt. 2
Pages:
0267
Distribution Statement:
Approved for public release; distribution is unlimited.
Contract Number:
NONR-50301
File Size:
12.83MB
