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THE EFFECT OF HYDROCHLORIC ACID AND AMMONIA ON PROPERTIES OF SOME REWORKED BODIES *
Author(s) -
Twells Robert
Publication year - 1936
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.1151-2916.1936.tb19840.x
Subject(s) - scrap , ammonia , metallurgy , glaze , hydrochloric acid , slurry , materials science , chemistry , composite material , organic chemistry , ceramic
A bstract When certain electrical‐porcelain bodies are shaped in the bone‐dry state, the scrap from the process is finely divided and has a low bulk density. Bodies reprepared from such scrap tend to blister and the glaze tends to contain pinholes after being fired at the maturing temperature. Blistering of the reworked body in firing is not decreased by vacuum treatment of the scrap body slip, and wet grinding definitely increases the blistering. Experiments were conducted in which hydrochloric acid and ammonia were added separately to the body scrap in gradually increasing quantities. The addition of ammonia tended to eliminate blistering of the body and pinholing of the glaze after firing.