| 摘要 |
PROBLEM TO BE SOLVED: To enhance accuracy and reliability by relatively enlarging the thermal curve variation and lowering the reading error to the utmost, and enhance measuring accuracy by removing the temperature variation caused by instability in temperature control of a heating furnace and clearly grasping only the temperature variation of a measuring sample. SOLUTION: A melting point measuring method in a thermal arrest process is that a heat resistant capsule in which the measuring sample is sealed is set inside a heating furnace, temperature is raised while the temperature of the sample is measured, and variation in the thermal curve in which the temperature rise stops by latent heat in melting the sample is read to find the melting point of the sample. An alloy or a solid solution is used as the measuring sample, the temperature of the sample is measured, and at the same time, the temperature of the heat resistant capsule is measured with another thermometer, the measured temperature data of the capsule is used as a reference, the differential values of the reference and the sample temperature data are plotted, and a reflection point of the plotted differential thermal curve is read out to find the melting point of the sample.
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