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Measurements of Heats of Mixing in Liquid Alloys with the Adiabatic Calorimeter

1968; Japan Institute of Metals and Materials; Volume: 32; Issue: 12 Linguagem: Inglês

10.2320/jinstmet1952.32.12_1281

1880-6880

Akira Yazawa, Takashi Kawashima, Kimio Itagaki,

thermodynamics and calorimetric analyses

The adiabatic calorimeter used for specific heat measurements was improved for the measurements of heats of mixing. The temperature difference between the calorimeter and adiabatic blocks is kept to be zero through the P.I.D controller, in order that the heat effect which arises in the calorimeter block can be measured adiabatically. This calorimeter is conveniently applied to the measurements of various kinds of thermal data, and the evaluation of the data obtained becomes very simple.Heats of mixing in four liquid binary systems such as lead-bismuth, lead-tin, indium-tin, indium-bismuth, were determined in the temperature range 300°C to 900°C. The results obtained for lead-bismuth system were in excellent agreement with the earlier data which had been recommended to use for the calibration of high temperature calorimeter. The results of other systems also agree fairly well with the previous data measured directly by calorimetry. Hence it is considered that the reliability of the apparatus and the method of this measurements was confirmed.