Accession Number : AD0609107

Title :   SEMICONDUCTING MATERIALS. PART I. SEMICONDUCTING AND ASSOCIATED PROPERTIES OF PROGRESSIVELY CRYSTALLIZED INFRARED TRANSMITTING GLASSES.

Descriptive Note : Final rept., pt. 1,

Corporate Author : STATE UNIV OF NEW YORK ALFRED COLL OF CERAMICS

Personal Author(s) : Slack,Lyle H.

Report Date : NOV 1964

Pagination or Media Count : 133

Abstract : Semiconducting glasses are a recently discovered class of materials which are attracting both theoretical and practical interest. The initial phase of this study consisted of an investigation of the thermoelectric properties of composites prepared by partially crystallizing the semiconducting glass As2SeTe2 where the crystalline phase which appeared is also As2SeTe2. The thermoelectric figure of merit was found to maximize as the degree of crystallinity was increased. Various anomalies are found when one attempts to study the mechanisms of conduction in the semiconducting glasses which might initially appear to violate band theory. These anomalies and peculiar behaviors are listed. It is evident that they may all be accounted for by the presence of an n-type high mobility phase disperse in a p-type low mobility phase. The infrared transmission data for the semiconducting glasses indicate the presence of crystalline As2O3. This suggests that this phase might also be responsible to some extent for the anomalous behaviors. (Author)

Descriptors :   (*SEMICONDUCTORS, GLASS), (*GLASS, SEMICONDUCTORS), (*COMPOSITE MATERIALS, THERMOELECTRICITY), CRYSTALLIZATION, ARSENIC ALLOYS, SELENIUM ALLOYS, TELLURIUM ALLOYS, IMPURITIES, POROSITY, ELECTRICAL CONDUCTIVITY, HALL EFFECT, PHASE STUDIES, ARSENIC COMPOUNDS, OXIDES, THERMAL CONDUCTIVITY, MICROSTRUCTURE, CHALCOGENS, INFRARED OPTICAL MATERIALS, DENSITY, DIELECTRIC PROPERTIES, X RAY DIFFRACTION, CRYSTALS

Distribution Statement : APPROVED FOR PUBLIC RELEASE