Device and method capable of simultaneously measuring multiple thermoelectric parameters of material

Abstract

The invention relates to a device and method capable of simultaneously measuring multiple thermoelectric parameters of a material. The device comprises electrodes, a heating power source and a data acquisition device, wherein the electrodes comprise an upper end electrode, a middle electrode and a lower end electrode, thermocouples for measuring the temperatures of the corresponding electrodes arearranged in the upper end electrode, the middle electrode and the lower end electrode; a heating rod is further arranged in the middle electrode, the heating power source is electrically connected with the heating rod, the thermocouples in the upper end electrode, the middle electrode and the lower end electrode are all electrically connected with the data acquisition device, the upper end electrode and the middle electrode are used for clamping a to-be-detected sample at the upper end, and the lower end electrode and the middle electrode are used for clamping a to-be-detected sample at the lower end. According to the invention, the Seebeck coefficient, the resistivity and the thermal conductivity of the material can be measured at the same time, the performance consistency of all performance parameters of the to-be-measured sample is ensured, the contrastive analysis of data is facilitated, the integration level of the system is high, the test time is short, the efficiency is high, and the investment cost is reduced at the same time.

Description

technical field [0001] The invention relates to the field of thermoelectric parameter measurement of thermoelectric materials, in particular to a device and method capable of simultaneously measuring multiple thermoelectric parameters of materials. Background technique [0002] Thermoelectric figure of merit: [0003] Where α is the Seebeck coefficient, ρ is the resistivity, T is the ambient temperature, and k is the thermal conductivity. [0004] Thermoelectric materials can be used for thermoelectric power generation or semiconductor refrigeration. The power generation and cooling efficiency of thermoelectric materials depends on the thermoelectric figure of merit, which is related to the Seebeck coefficient, resistivity and thermal conductivity of the material. To improve the performance of thermoelectric materials, it is mainly from these three start with a physical parameter. [0005] However, the current test equipment cannot measure these three parameters at the s...

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Problems solved by technology

[0005] However, the current test equipment cannot measure these three parameters at the same time, which leads to high equipment investment costs, long test time and low efficiency, and the test results may be different due to the difference in the lattice direction, so the test results of different parameters cannot be comprehensively compared And other issues

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