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THE RATE OF OXIDATION OF PORCELAIN AND BALL CLAYS 1
Author(s) -
Kraner Hobart M.,
Fritz E. H.
Publication year - 1929
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.1151-2916.1929.tb16884.x
Subject(s) - ceramic , kiln , lime , materials science , mineralogy , oxygen , bar (unit) , soda lime , metallurgy , nitrogen , composite material , chemical engineering , chemistry , geology , organic chemistry , oceanography , engineering
In this study the rate of CO 2 evolution was determined by passing a 4% oxygen to 96% nitrogen gas mixture over a bar of clay or porcelain while this bar was being heated at an approximate rate obtained in the ceramic kilns. The water and CO 2 evolved were collected in phosphorous pentoxide and soda lime, respectively, and the respective apparatus weighed each half hour during the length of the run. It was found that oxidation took place rapidly between 200°C and 550°C in both clay and porcelain. This is much different from what has been generally understood to be true, for in all the ceramic literature 750°C seems to be indicated as the most efficient temperature at which oxidation proceeds. It appears that oxidation of ceramic ware such as these can take place at much lower temperatures and with much greater economy in firing practice.