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PROPERTIES AND USES OF PURE OXIDE HEAVY REFRACTORIES *
Author(s) -
Whittemore O. J.
Publication year - 1949
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1949.tb18925.x
Subject(s) - cubic zirconia , materials science , thermal conductivity , porosity , brick , oxide , composite material , shrinkage , magnesium , metallurgy , mineralogy , ceramic , chemistry
A bstract Thermal conductivity, high‐temperature load‐bearing resistance, reheat shrinkage, and porosity were determined on new pure oxide heavy refractories of alumina, magnesia, and stabilized zirconia. Alumina refractories were shown to be capable of lining furnaces for operation to 1900 °C, and magnesia and stabilized zirconia refractories to at least 2300 °C. The thermal conductivity of alumina refractories was found to vary directly with density, and four mixtures are described with conductivities ranging from 6 to 18 B.t.u. per hr. per sq. ft. per in. per °F. at 1800°F. Stabilized zirconia refractories, although having twice the bulk density of fire‐clay brick, showed lower thermal conductivity. The uses and limitations of pure oxide heavy refractories are discussed.