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REACTIONS TAKING PLACE DURING SMELTING OF SUPEROPAQUE ANTIMONY ENAMEL *
Author(s) -
King Burnham W.,
Andrews Andrew I.
Publication year - 1940
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.1151-2916.1940.tb14259.x
Subject(s) - enamel paint , antimony , borax , antimony trioxide , smelting , metallurgy , chemistry , mineralogy , materials science , raw material , nuclear chemistry , composite material , organic chemistry
A bstract The reactions taking place during the smelting of a typical superopaque antimony enamel were studied by first determining the thermal effects which occur during the smelting of the raw batch and then by investigating the reactions which produce these effects. By this method, it was found that up to 500°F. the chief reaction was the dehydration of the borax. Between 500° and 800°F., the first liquid developed with the melting of the soda niter. Most of the reactions, however, took place from 800° to 1300°F. Soda niter and sodium silicofluoride were decomposed, and the antimony trioxide was oxidized. Above 1300°F., considerable glass was formed, and the enamel gradually became more uniform.