Accession Number:

ADA021978

Title:

Transition Metal Ions and Heterogeneous Nucleation in Glass

Descriptive Note:

Final rept. 1 Jan 1973-31 Dec 1975

Corporate Author:

RENSSELAER POLYTECHNIC INST TROY NY DIV OF MATERIALS ENGINEERING

Personal Author(s):

Report Date:

1975-01-01

Pagination or Media Count:

15.0

Abstract:

The research carried out during the tenure of the support is described. The work shows 1 That the magnetic ions in the glasses studied iron ions are contained in well defined structures, namely diads and triads. The physical properties of these structures are described and the relevant parameters determined. 2 That during nucleation heat treatments, there is very little change in the structure of the glass as determined by magnetic measurements. Only oxidation of Fe yielding Fe3 takes place, but this seems to play a vital role in determining the final crystalline product phase. 3 On crystallisation, Fe3O4, Y-Fe2O3 and some spinel form depending upon the temperature of nucleation. These phases determine the majority crystalline phase of the glasses. In conclusion, there is much in the magnetic properties of these glasses which are imperfectly understood. Finally, a list is given of students and research associates who worked on the project and their thesis abstracts. Also given are the abstracts of the technical reports and papers.

Subject Categories:

  • Ceramics, Refractories and Glass
  • Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE