A Fusion Study of the Mineral Systems, Feldspar-Calcite and Feldspar-Magnesite: Thesis Submitted in Partial Fulfillment of the Requirements for the ... School of the University of Illinois, 19 - Tapa dura

Sinopsis

Excerpt from A Fusion Study of the Mineral Systems, Feldspar-Calcite and Feldspar-Magnesite: Thesis Submitted in Partial Fulfillment of the Requirements for the Degree of Master of Science in Ceramic Engineering in the Graduate School of the University of Illinois, 1916

The deformation point of a body is that temperature at which it deforms on heating, For this determination, the method most commonly used and the one employed in this investigation is as follows: A triangular upright cone of the substance is heated at a definite and uniform rate until it bends so that the top touches the base support, or failing to bend, it fuses to a ball. The temperature at the instant of contact or of balling-up is called the de formation point and is measured by means of a thermocouple pyrometer, Optical pyrometer,or standard cones. It is understood that in the case of balling-up, repeated trials have shown that the cone possesses such high viscosity and surface tension that it can not be made to deform nor mally.

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