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Variable temperature sample platform and thermoelectric property measuring method

A technology of thermoelectric performance and sample stage, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., it can solve the problems of inability to measure thermoelectric potential, and the average temperature of the sample cannot be accurately maintained at a certain set value. The effect of improving reliability

Active Publication Date: 2015-03-18
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] It can be seen that the sample holder of this patent is only equipped with a temperature difference heater, and although the temperature difference of the sample strip can be stabilized at a certain fixed value only by the temperature difference heater, the average temperature of the sample cannot be accurately maintained at a certain value. A set value, so the measurement of thermoelectric potential in steady state mode cannot be realized

Method used

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  • Variable temperature sample platform and thermoelectric property measuring method
  • Variable temperature sample platform and thermoelectric property measuring method
  • Variable temperature sample platform and thermoelectric property measuring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] figure 1 and figure 2 Shown are the schematic diagrams of the upper structure and the lower structure of the variable temperature sample stage provided in this embodiment, respectively.

[0074] A temperature-variable sample stage provided in this embodiment includes a sample holder, a sample rod 2 , and a connecting piece arranged between the sample holder and the sample rod 2 .

[0075] The sample holder includes a base 3 , an insulating backing plate 4 and a sample spacer 5 . There are two sample cushion blocks 5, and the two sample cushion blocks 5 are arranged in parallel with a certain interval in the middle, and are symmetrically distributed, and each of the sample cushion blocks 5 is connected to the two first fasteners 14 through two first fasteners 14. The base 3 is fixedly connected.

[0076] The insulating backing plate 4 is located between the sample block 5 and the base 3, the insulating backing plate 4 is provided with four first through holes 17, and...

Embodiment 2

[0085] Such as Figure 10 Shown is a schematic structural diagram of the dual-mode pyroelectric performance detection device provided in this embodiment.

[0086] A dual-mode thermoelectric performance measurement device provided in this embodiment is equipped with a variable temperature sample stage, including a variable temperature sample stage, a voltage measuring instrument, a current source meter, a temperature measuring instrument, vacuum equipment, liquid nitrogen filling equipment, a computer 43, PID controller and resistance measuring instrument, etc.

[0087] The vacuum equipment includes a vacuum chamber 47 , a vacuum acquisition device connected to the vacuum chamber 47 and a vacuum measuring device for detecting the vacuum degree of the vacuum chamber 47 . The vacuum obtaining device includes a molecular pump 50 and a mechanical pump 51 connected to the molecular pump 50 . The vacuum measuring device includes a vacuum gauge 52 arranged on the vacuum chamber 47 a...

Embodiment 3

[0109] A thermoelectric performance measurement method of a dual-mode thermoelectric performance measurement device equipped with a variable temperature sample stage is implemented according to the following steps:

[0110] Step S0: fixing the sample strip 9 on the variable temperature sample stage.

[0111] Step S1: placing the variable temperature sample stage in the vacuum chamber 47 of the dual-mode thermoelectric property measurement device.

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Abstract

The invention discloses a variable temperature sample platform, belonging to the field of measuring a thermoelectric material. The variable temperature sample platform comprises a sample base, a sample rod and a connecting piece arranged between the sample base and the sample rod, wherein the sample base comprises a main heater, two temperature difference heaters, a substrate, an insulating padding plate, a sample padding block and a sample pressing block; a main heater pressing block is used for fixing the main heater; temperature difference heater pressing blocks are used for fixing the temperature difference heaters; the sample padding block is fixed on the substrate by virtue of a first fastener; the insulating padding plate is located between the sample padding block and the substrate; and the sample pressing block is fixedly connected to the sample padding block by virtue of second fasteners at two ends of the sample pressing block. The variable temperature sample platform disclosed by the invention is suitable for detection of thermoelectric potential under two modes, namely a steady-state mode and a quasi-steady-state mode, and can be used for simultaneously measuring a specific resistance.

Description

technical field [0001] The invention relates to the measurement field of thermoelectric materials, in particular to a variable temperature sample stage and a method for measuring thermoelectric performance of a dual-mode thermoelectric performance measuring device equipped with the variable temperature sample stage. Background technique [0002] The performance of thermoelectric materials can be judged by the thermoelectric figure of merit ZT (Thermoelectric figure of merit), and its characterization formula is: ZT=S 2 T / ρκ. Among them, S is the thermoelectric potential (or Seebeck coefficient), T is the absolute temperature, ρ is the resistivity, and k is the thermal conductivity. In the practice of measuring thermoelectric properties, thermoelectric potential S and resistivity ρ are often used as the two primary physical quantities to describe the thermoelectric properties of materials. [0003] Two methods are usually used for thermoelectric potential S measurement: ...

Claims

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Application Information

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IPC IPC(8): G01N25/20G01R31/00G01R27/08
Inventor 王汉夫褚卫国
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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