Publication Type
Conference Paper
Publication Date
Page Numbers
152 to 156
Volume
N/A
Conference Name
Forty-sixth Symposium on Refractories
Conference Location
St. Louis, Missouri, United States of America
Conference Sponsor
St. Louis Section and Refractory Ceramics Division of the American Ceramic Society
Conference Date
-
Abstract
Phase relations between two spinel compounds (MgAl2O4 and MgGa2O4) were studied. Stoichiometric MgAl2O4 was formed in the laboratory through a coprecipitation method. Complete solid solution formation int eh MgAl2O4-MgGa2O4 systems was confirmed through X-ray diffraction analysis. Solid solution between MgAl2O4-MgGa2O4 decreases thermal conductivity at all temperatures up to 900oC. At 200oC with 10 mol% additoin of MgGa2O4 thermal conductivity decreases approximately 25%, and at 900oC there was still an 8% decrease. Additionally, preliminary studies show that porosity between 5% and 10% does not have an appreciable effect on the thermal conductivity in this study.
