Accession Number:

AD0677250

Title:

STUDIES OF TRIVALENT RARE-EARTH OXIDE-BERYLLIUM OXIDE SYSTEMS,

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

Report Date:

1967-10-25

Pagination or Media Count:

6.0

Abstract:

Experiments were conducted on products of reactions between trivalent rare earth oxides and beryllium oxides and on the equilibrium of the Gd2O3-BeO system. Phase diagrams of the Gd2O3-BeO system were plotted based on the analytic results obtained by three methods, viz., quenching, polarizing microscope, and x-ray diffraction. A new biaxial crystalline phase n sub p 1.89, n sub g 1.94, angle between axes 90 deg. was found having parameters a 3.603 plus or minus 0.003 A, b 9.85 plus or minus 0.03 A c 10.51 plus or minus 0.02 A. The new crystalline phase shows a diffraction pattern similar to that of yttrium oxide when being decomposed at 1460C. Chemical composition of the new phase was determined to be Gd2O3.2BeO. Author

Subject Categories:

  • Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE