Method of Measuring the Dielectric Constant of Solid Having Arbitrary Forms and Its Application to Sodium Chloride
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概要
- 論文の詳細を見る
The principle and the practical apparatus for measuring the dielectric constant of solid having arbitrary forms are described in detail. The measurement is made with two cylindrical condenser cells having exactly the same dimensions ; one of these cells is filled with solid sample and the reference liquid which will not dissolve the sample, and the other cell with the liquid only. If the measured electric capacities of the two condenser cells are made equal by varying temperature, then the dielectric constant of the sample is equal to that of liquid which has previously been calibrated. In order to confirm experimentally that the dielectric constant can be determined by this "immersion method" independently of the form and size of the specimen or of the volume filling factor of the specimen packed in the condenser cell, comparison is made between the dielectric constant of glass measured by this method under various different conditions and that measured by the ordinary method using a large plane-parallel glass plate. It is found that they agree with one another satisfactorily within the experimental error. This immersion method is applied to the determination of the dielectric constant of NaCl, as this value reported previously by different authors differs considerably by 5.60 to 6.36. It is shown by the present experiment that the dielectric constant of NaCl depends considerably on the conditions under which the crystal is made to grow or on the treatment of sample crystal after it is made.
- 東北大学の論文
著者
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Fujimura Tadao
Research Institute For Scientific Measurements
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Kamiyoshi Kan-ichi
Research Institute For Scientific Measurements
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