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Measurement apparatus and method for representing service stability of thermoelectric material under heavy current effect

A technology for measuring devices and thermoelectric materials, applied in the directions of measuring devices, measuring electricity, and measuring electrical variables, etc., can solve the problem of not being able to provide the migration speed and degree of Cu ions, achieve a large test temperature span, convenient operation, and prevent excessive current Effect

Active Publication Date: 2016-08-31
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method of qualitative judgment cannot provide more detailed information such as the speed and extent of Cu ion migration in the material.

Method used

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  • Measurement apparatus and method for representing service stability of thermoelectric material under heavy current effect
  • Measurement apparatus and method for representing service stability of thermoelectric material under heavy current effect
  • Measurement apparatus and method for representing service stability of thermoelectric material under heavy current effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Cu 2 S material

[0084] The selected length is 9 mm, and the cross-sectional area is about 2.54 mm 2 cuboid Cu 2 S sample. Bond the welded R-type thermocouple to 1 / 3 and 2 / 3 of the length on the side of the sample through high-temperature carbon paste, and wrap and package the side of the sample with high-temperature glue (mainly composed of sodium silicate), and store it at 150 °C Tumble dry to secure. Sample passed through Al 2 o 3 The push rod applies proper pressure and is fixed between the metal Ni block and the metal Cu block. Inflate and deflate the furnace chamber three times before the test, and finally inject high-purity argon to establish an inert gas test environment. Raise the temperature to 750 K (specified test temperature) at a rate of 5 K / min, and keep it warm at this temperature. At the same time, monitor its resistance change with a test current of 1-10 mA. If the fluctuation of resistance change within 10 h is less than 5%, it is considered ...

Embodiment 2

[0087] CuGaTe 2 Material

[0088] The selected length is 11 mm, and the cross-sectional area is about 3.42 mm 2 Cuboid CuGaTe 2 sample. Bond the welded R-type thermocouple to 1 / 3 and 2 / 3 of the length on the side of the sample through high-temperature carbon paste, and wrap and package the side of the sample with high-temperature glue (mainly composed of sodium silicate), and store it at 150 °C Tumble dry to secure. Sample passed through Al 2 o 3 The push rod applies proper pressure and is fixed between the metal Ni block and the metal Cu block. Inflate and deflate the furnace chamber three times before the test, and finally inject high-purity argon to establish an inert gas test environment. Raise the temperature to 750 K (specified test temperature) at a rate of 5 K / min, and keep it warm at this temperature. At the same time, monitor its resistance change with a test current of 10-50 mA. If the fluctuation of resistance change within 10 h is less than 5%, it is consi...

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Abstract

The invention relates to a measurement apparatus and method for representing service stability of a thermoelectric material under a heavy current effect. The measurement apparatus comprises a positive electrode and a negative electrode, a power supply, an ampere meter, a voltmeter, a multi-channel data acquisition device, and a computer. The positive electrode and the negative electrode are accommodated into a temperature control furnace; and a to-be-measured sample is fixed between the positive electrode and the negative electrode. The power supply and the ampere meter are connected in series with the positive electrode and the negative electrode. The voltmeter is connected in parallel with thermocouples of the to-be-measured sample. The multi-channel data acquisition device connected with the power supply, the ampere meter, and the voltmeter is used for collecting voltage, current and temperature signals. And the computer connected with the multi-channel data acquisition device is used for obtaining data, changing with conduction time, of the resistance of the to-be-measured sample according to the data collected by the multi-channel data acquisition device.

Description

technical field [0001] The invention relates to a measuring device and method for characterizing the service stability of a thermoelectric material under the action of a large current, and belongs to the technical field of thermoelectric conversion. Background technique [0002] Thermoelectric material is a new type of non-polluting and stable energy conversion material that can directly convert waste heat into usable electrical energy, and can use electrical energy for refrigeration without pollutant emissions. Devices made of thermoelectric materials are usually all-solid-state devices with long service life, high reliability, environmental friendliness, wide operating temperature range, no noise, and effective use of low-density energy. However, the low energy conversion efficiency restricts the development of its practical application. [0003] In recent years, with the theory of "electron crystal-phonon glass" (Slack G A. CRC Handbook of Thermoelectrics , Rowe D M, ed...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01R27/08
Inventor 史迅朱雅琴陈立东仇鹏飞
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI