加熱によるガラスの密度変化
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概要
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Contractions or density changes of chilled lead glass samples caused by heating them at constant temperatures in the temperature range from 150° to 500°C, were observed by both interferometric dilatometer and sink-float method for measuring density. By comparing the time-contraction relations at various temperatures with the equations proposed by Tool, Ritland or Kanai and Sato, it was found that these equations did not hold exactly in the abovementioned temperature range which is lower than that examined by the above authors. It was supposed that there must be several mechanisms which cause this density change, and the mechanism which contributes mainly to the density change must be different for different range of temperatures.
- 1957-08-01
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