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A STUDY OF AN ALUMINA‐SILICA CHECKER BRICK FROM THE REGENERATOR OF A GLASS TANK *
Author(s) -
Thompsoni C. L.,
Rexford E. P.
Publication year - 1938
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.1151-2916.1938.tb15744.x
Subject(s) - brick , thermal expansion , layer (electronics) , materials science , mullite , corundum , composite material , regenerative heat exchanger , thermal , core (optical fiber) , mineralogy , chemistry , ceramic , physics , heat exchanger , meteorology , thermodynamics
A bstract At the end of a campaign, alumina‐silica checker brick in glass‐tank regenerators occasionally are found to have undergone partial destruction as a result of the separation of an altered surface layer of the brick from the less affected core. In an investigation of such an occurrence, it was found that the outer layer had largely been converted to nephelite by reaction of soda vapors and dust from the glass batch with mullite and corundum in the brick. Thermal expansion determinations showed that the rate of reversible thermal expansion in the altered layer was almost twice as great as that of the unaltered brick. It is concluded that the separation or slabbing of the altered layer was due in part to this difference in thermal expansion and in part to a permanent expansion of the slabbed layer which occurred apparently when portions of the brick substance were converted to nephelite.