Accession Number : AD0613306

Title :   SOME SOLID STATE STUDIES OF SILVER-DOPED WO3,

Corporate Author : CORNELL UNIV ITHACA N Y

Personal Author(s) : Sienko,M. J. ; Mazumder,B. R.

Report Date : 19 DEC 1959

Pagination or Media Count : 9

Abstract : A material corresponding to Ag0.010WO3 was isolated from the thermal equilibration of WO3 with various sources of silver. Single crystal studies indicate that it is orthorhombic (a = 7.35 A, b = 3.73 A, and c = 3.85 A) and that it conducts as a metal between 25 and 600C (specific resistivity increases linearly from 0.072 ohm-cm at 25C to 0.155 ohm-cm at 600C.). The electron mobility at 25C. of 0.44 sq. cm/volt sec. is approximately the same as that previously observed in thallium tungsten bronze. It is proposed that Ag0.010WO3 represents a defect structure in which the 5 d conduction band of WO3 is populated by electrons from the silver atoms and in which a more symmetric structure of WO3 has been stabilized by configurational entropy. (Author)

Descriptors :   (*SINGLE CRYSTALS, IMPURITIES), (*SILVER ALLOYS, SINGLE CRYSTALS), (*TUNGSTEN COMPOUNDS, OXIDES), SOLID SOLUTIONS, CRYSTAL STRUCTURE, ELECTRICAL CONDUCTIVITY, ELECTRON TRANSITIONS, ENTROPY, SOLID STATE PHYSICS

Distribution Statement : APPROVED FOR PUBLIC RELEASE