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Point-defect formation and temperature coefficient of electrical resistivity of platinum and platinum-(10 wt%) rhodium alloy in the range 1100–1900 K

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Abstract

Measurement of the temperature coefficient of electrical resistivity of platinum and platinum-(10 wt%) rhodium alloy was performed by the modulation method in the temperature range 1100–1900 K. Nonlinear change in the temperature coefficient of resistivity of metals at high temperatures can be explained by the formation of equilibrium point defects. The enthalpy of point-defect formation in platinum md platinum-rhodium alloy has been determined to be 1.6±0.3 and 1.8±0.3 eV, respectively. The modulation frequency was 0.2 Hz; the amplitude of the temperature oscillation was about 10 K. The accuracy of the temperature coefficient of resistivity measurements was about 1%.

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Authors and Affiliations

  1. Institute of Inorganic Chemistry, USSR Academy of Sciences, Novosibirsk, USSR

    S. Yu. Glazkov

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  1. S. Yu. Glazkov
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Glazkov, S.Y. Point-defect formation and temperature coefficient of electrical resistivity of platinum and platinum-(10 wt%) rhodium alloy in the range 1100–1900 K. Int J Thermophys 6, 421–426 (1985). https://doi.org/10.1007/BF00500272

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  • DOI: https://doi.org/10.1007/BF00500272

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