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NOTES ON SHIVERING OF TERRA COTTA 1
Author(s) -
Carruthers John L.
Publication year - 1922
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.1151-2916.1922.tb17437.x
Subject(s) - shivering , grog , geology , frit , mineralogy , geochemistry , materials science , metallurgy , medicine , anesthesia
Six terra cotta clays are tested for shivering as a body trouble using a white mat glaze, at cone 3 starting. One non‐shivering clay and one badly shivering clay are experimented with, to produce and overcome shivering. Causes of Shivering .—From this work and that of others which has been checked, uses are1 presence of finely divided silica in the body, from(a) highly siliceous clays (b) finely ground grog of a siliceous nature2 presence of soluble salts in the clay, grog, or tempering water 3 longer firing periodsMethods of Eliminating Shivering.1 Use of a flux such as feldspar, felsite , or similar rock to overcome action of fine silica 2 Use of coarse grog or sand 3 Use of barium carbonate to overcame effects of salts