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Method for increasing measured seebeck coefficient accuracy of thermoelectric material

A thermoelectric material and coefficient technology, which is applied in the measurement of electricity, measurement of electric variables, measurement devices, etc., can solve the problems of inability to meet the quantitative analysis of material properties, error of thermoelectric conversion efficiency, low measurement accuracy, etc. Accuracy and precision, the effect of high measurement accuracy

Inactive Publication Date: 2014-10-29
SHANDONG UNIV
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Problems solved by technology

However, the current high-temperature Seebeck coefficient measurement accuracy is not high, which cannot meet the requirements for quantitative analysis of material properties, and also brings certain errors to the evaluation of thermoelectric conversion efficiency.

Method used

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  • Method for increasing measured seebeck coefficient accuracy of thermoelectric material
  • Method for increasing measured seebeck coefficient accuracy of thermoelectric material
  • Method for increasing measured seebeck coefficient accuracy of thermoelectric material

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Experimental program
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Embodiment 1

[0049] A method for improving the accuracy of measuring the Seebeck coefficient of thermoelectric materials,

[0050] —Temperature measurement stage: three Cernox resistance thermometers are respectively fixed on the outer screen 7 and platform A4 and platform B5 of the vacuum chamber where the thermoelectric material is placed, using heat-conducting glue. These three electronic thermometers are external screen thermometer 1, platform A thermometer 2 and platform B Thermometer 3. The three resistance thermometers are respectively connected to an ARRAY M3500A six-and-a-half-digit multimeter, and the resistance is measured by the four-wire method 16. The current source provides a controllable constant current for the thermoelectric material. The current of the voltmeter is ignored, so the reading of the voltmeter divided by the current value is the resistance of the thermoelectric material. Under the condition that the resistance of the resistance thermometer is accurately measur...

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Abstract

Disclosed is a method for increasing measured seebeck coefficient accuracy of a thermoelectric material. The resistance of electrical resistance thermometers is measured by a four-wire method, lead resistance is effectively eliminated, reading accuracy of the electrical resistance thermometers can be guaranteed, the temperature control accuracy is increased through a PID temperature control algorithm, temperatures of two ends of the thermoelectric material can be accurately adjusted to a required numerical value, according to a temperature backward method, the influence of parasitic potential on a measuring result can be eliminated, and the measured seebeck coefficient accuracy can be guaranteed. According to the method for increasing the measured seebeck coefficient accuracy of the thermoelectric material, measuring accuracy is guaranteed in a series of measuring steps of measuring the temperature of the thermoelectric material, changing the temperature values of the two ends of the thermoelectric material, eliminating the parasitic potential and the like, and the method for increasing the measured seebeck coefficient accuracy of the thermoelectric material is effective, easy to implement and significant to application occasions with high requirements for the seebeck coefficient accuracy.

Description

technical field [0001] The invention relates to a method for improving the accuracy of measuring the Seebeck coefficient of thermoelectric materials, belonging to the technical field of electrical testing and measurement. Background technique [0002] The thermoelectric effect, also known as the Seebeck effect, is a kind of effect of mutual conversion between electricity and heat, which is closely related to the properties of the Fermi surface of materials, and is of great significance in the study of physical properties; the thermoelectric effect can be applied to Thermoelectric power generation and semiconductor refrigeration, therefore, have attracted extensive attention from scientific researchers. However, the current high-temperature Seebeck coefficient measurement accuracy is not high, which cannot meet the requirements of quantitative analysis of material properties, and also brings certain errors to the evaluation of thermoelectric conversion efficiency. By systema...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01N25/00
Inventor 刘剑赵明磊李茂奎王震李宜
Owner SHANDONG UNIV
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