Publisher's Synopsis
Excerpt from A Study of the Vitrification Range and Di-Electric Behavior of Some Porcelains, Vol. 7
The object of this work, which was begun in the sum mer of 1908, was to show by graphical means the propor tions of. Clay, feldspar and ?int which produce vitrified clay bodies at temperatures within the limits of American practice. At the same time this opportunity was taken to show, if possible, the relation between the composition of the bodies and their electrical resistance. In order to bring out the effect of introducing the various clays used in the industries it was decided to cover the field outlined by using Tennessee ball clay No. 3, North Carolina kaolin, English China clay and Georgia kaolin. All of these materials, as well as the feldspar and ?int were obtained from the works of the Mayer Pottery Company, Beaver Falls, Pa., through the kindness of Mr. Ernest Mayer and Mr. Herford Hope.
The materials were analyzed in the chemical depart ment of the University of Illinois. The results of the analyses, as well as the empirical formulae of these compo nents are given in the following table.
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