Accession Number:

AD0262605

Title:

NIOBIUM IODIDE AND SOME OF ITS PROPERTIES

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH

Report Date:

1961-07-06

Pagination or Media Count:

43.0

Abstract:

The apparatus and techniques for the purification of Nb by the thermal dissociation of its iodides are described. Twenty-five thermal dissocia ion experiments were performed during which the temperature in various sections of theAPPARATUS WAS VARIED AND THE PRODUCTS RESULTING WERE COMPARED ON THE BASIS OF HARDNESS AND MICROSTRUCTURE. As a result of these experiments, it was concluded that 1 the thermal dissociation of volatile niobium iodides was possible, 2 the decrease in hardness and the disappearance of a second phase of niobium iodide indicated that purification was being accomplished, 3 the crystallization from the gaseous phase was temperature dependent on the filament temperature, and 4 the optimum conditions were established for the apparatus.

Subject Categories:

  • Inorganic Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE