Abstract
An interlaboratory testing program on the measurement of the linear thermal expansion coefficient of low-expansion glasses has been carried out. Three different types of interferometric dilatometers, each located at three different organizations, and two kinds of low-expansion glass materials were selected for the experiments. As a result of the comparison, a reasonable agreement among the different measuring instruments was confirmed, and it was determined that the thermal expansion coefficient for low-expansion glasses can be measured with an accuracy of ±4×10−8 K−1 by using commercially available interferometric dilatometers.
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Imai, H., Okaji, M., Kishii, T. et al. Measurement of thermal expansivity of low-expansion glasses by interferometric methods: Results of an interlaboratory comparison. Int J Thermophys 11, 937–947 (1990). https://doi.org/10.1007/BF00503585
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DOI: https://doi.org/10.1007/BF00503585