Accession Number:

AD0252397

Title:

SINGLE CRYSTAL GROWTH OF THE GARNET TYPE OXIDES. PART II. PHASE RELATIONS IN THE TERNARY SYSTEM FE203-FE0-YFE03

Descriptive Note:

Corporate Author:

RAYTHEON CO WALTHAM MA

Personal Author(s):

Report Date:

1961-01-09

Pagination or Media Count:

1.0

Abstract:

Equilibrium data are presented for the ternary system, Fe2O3-FeO-YFeO3, in ambient atmospheres of air, O, and CO2 at melting temperatures. The temperature range for the coexistence of Y-Fe garnet and oxide liquid decreases with decreasing O partial pressure from 127C in O to 86C in air to 20C in CO2. In addition, the composition of the garnet phase crystallizing from these melts changes with variations of temperature and O pressure. The experimental data are discussed in terms of a polythermal-polybaric model of the system. Some conclusions are drawn as to the limiting conditions in different atmospheres for the growth and the resulting composition of Y-Fe garnet crystals in equilibrium with ternary oxide liquids. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE