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概要
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The construction and the operation of the automatic recording dilatometer which was developed for measuring the thermal expansion of glass is described. The sample, 10cm long and 1.5-2.0mm in diameter, was heated at a constant rate, and the temperature was recorded by an automatic temperature recorder. The expansion of the sample was magnified by an optical lever having the effective length of about 5mm, and was traced by a tracer mechanism. This mechanism drived therecording chart of the recorder, and as the result, the expansion curve of the sample was drawn on the chart.Several improvements were also made on the dilatometer to increase its accuracy.Results of the measurements for three kinds of glass are described briefly.
- 1957-10-01
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