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ZINC‐VAPOR GLAZING OF CLAYS: I *
Author(s) -
Lampman C. Major,
Schurecht H. G.
Publication year - 1939
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.1151-2916.1939.tb19433.x
Subject(s) - glaze , glazing , brick , zinc , mineralogy , metallurgy , materials science , alkali metal , oxide , iron oxide , chemistry , composite material , ceramic , organic chemistry
A bstract A study was made of the influence of the iron‐oxide and alkali contents and absorptions of clay bodies on their ability to take a zinc‐green vapor glaze. Although greens may be obtained on bodies with a wide range of compositions and with absorptions up to 8.4% under exacting conditions, the range of bodies which take a green glaze under less favorable circumstances is comparatively small. The probability of obtaining good greens was greatest with those bodies whose absorptions were below 2% and which contained 8 to 18% iron oxide and more than 6% alkalis. Firing to higher temperature and cooling rapidly improved the tendency to produce greens. Desirable tans, browns, brick reds, and grays were obtained by firing to low temperatures and cooling slowly.