Robert Twells
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View article: TALC AS A FLUX FOR HIGH TENSION INSULATOR PORCELAINS <sup>1</sup>
TALC AS A FLUX FOR HIGH TENSION INSULATOR PORCELAINS <sup>1</sup> Open
MgO has some possibilities as a partial or total flux in high tension insulator porcelains. To be practical for this purpose it must be introduced into the body through some cheap material which will not make a large percentage of calcine …
View article: THE FIELD OF PORCELAIN GLAZES MATURING BETWEEN CONES 17 AND 20 <sup>1</sup>
THE FIELD OF PORCELAIN GLAZES MATURING BETWEEN CONES 17 AND 20 <sup>1</sup> Open
Field Covered .—A typical porcelain glaze formula: image was used. The RO was held constant, the Al 2 O 3 was varied between 0.8 and 1.6 equivalents, and the SiO 2 between 6 and 16 equivalents. Firing Test.— the galzes were applied to gree…
View article: BERYL AS A CONSTITUENT IN HIGH TENSION INSULATOR PORCELAIN
BERYL AS A CONSTITUENT IN HIGH TENSION INSULATOR PORCELAIN Open
Two series, one of 9 bodies and one of 6, were prepared, in which flint and feldspar were partially replaced, weight for weight, by beryl. Bars and discs were fired to cone 8 3/4, to 10, or to 10 3/4 and tested for shrinkage, transverse st…