Accession Number : AD0736026

Title :   Thermal Expansion Measurements in the Nb2O5-Ta2O5 System,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Kidwell,G. Dwayne ; Richardson,James H. ; Wolten,Gerard M.

Report Date : 15 DEC 1971

Pagination or Media Count : 26

Abstract : Optical interferometry and x-ray diffractometry have been used to measure the thermal expansion of selected compositions in the Nb2O5 - Ta2O5 system. A 70 wt% Nb2O5 - 30 wt% Ta2O5 composition has a coefficient of thermal expansion of 0.12 X 10 to the minus 6th power in the temperature range 22 to 346C. Coefficients of thermal expansion for three orthogonal directions of 99.9% pure Nb2O5 were measured over two temperature ranges. (Author)

Descriptors :   (*CERAMIC MATERIALS, *THERMAL EXPANSION), TANTALUM COMPOUNDS, NIOBIUM COMPOUNDS, OXIDES, INTERFEROMETERS, X RAY DIFFRACTION, EXPERIMENTAL DESIGN

Subject Categories : Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE