Method and system for measuring quasi one-dimensional nano-material Seebeck coefficient

A technology of nanomaterials and coefficients is applied in the measurement field of Seebeck coefficients of thermoelectric materials to achieve the effects of simple production, low cost and easy promotion.

Inactive Publication Date: 2009-01-28
PEKING UNIV
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Problems solved by technology

As mentioned above, there is no simple and effective method and platform to realize th

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  • Method and system for measuring quasi one-dimensional nano-material Seebeck coefficient
  • Method and system for measuring quasi one-dimensional nano-material Seebeck coefficient
  • Method and system for measuring quasi one-dimensional nano-material Seebeck coefficient

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Embodiment Construction

[0038] Below in conjunction with accompanying drawing, further describe the present invention through embodiment, but do not limit the scope of the present invention in any way.

[0039] Such as figure 1 As shown, the centimeter-level block metal electrode 1 of the experimental platform used is connected to the base 6 through a heat insulating gasket 7, and each block metal electrode 1 has two pressing sheets 4 made of the same material, a total of four sheets, The middle group of pressing tablets is used to press the transition electrodes 2, and the outer group of pressing tablets presses the voltage measurement line, and the quasi-one-dimensional nanomaterial 3 to be measured is placed on the two transition electrodes 2.

[0040] The size of the bulk metal electrode 1 is about 10mm×10mm×40mm, and its material requires thermal conductivity greater than 100W / mK, electrical conductivity greater than 15000000S / m, and the preferred material is copper. In order to reduce heat con...

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Abstract

The invention discloses a method and a system that are used for measuring the Seebeck coefficient of a quasi-one-dimensional nano material; two line transition electrodes with micrometer-scaled cross sections are respectively contacted with two centimeter-scaled block metal electrodes, a nano probe system is utilized for leading a single rod of the quasi-one-dimensional nano material to be detected to be connected with the two transition electrodes, temperature difference between the two block metal electrodes is altered, and the temperature difference and corresponding potential difference between the two electrodes are simultaneously measured, thus obtaining the Seebeck coefficient of the quasi-one-dimensional nano material. The corresponding testing system comprises three parts of an experimental platform, a temperature altering device and a data collecting and processing device. The method and the system solve the problem of the contact transition between the centimeter-scaled electrodes and the nano sample to be detected through the micrometer-scaled transition electrodes, utilize the nano probe system for installing the nano material, and lead the nano material not to be randomly dispersed at two sides of the electrodes, thus improving experimental success rate, controllability and reliability; and the provided measuring system has the advantages of simple structure, low cost and easy popularization and the like.

Description

technical field [0001] The invention relates to the technical field of measuring the Seebeck coefficient of thermoelectric materials, in particular to a method and system for measuring the Seebeck coefficient of quasi-one-dimensional nanomaterials such as nanotubes, nanowires and nanobelts. Background technique [0002] Thermoelectric materials have the advantages of small size, light weight, no mechanical parts, and no noise, which are incomparable to ordinary mechanical refrigeration or thermoelectric power generation methods. The characterization of thermoelectric materials is the dimensionless figure of merit ZT=S 2 σ / κ, where S is the Seebeck coefficient (Seebeck coefficient), σ is the electrical conductivity, and κ is the thermal conductivity. Its intuitive meaning is the ratio of refrigeration absorption energy to energy consumption, but the ZT coefficient of ordinary bulk materials is less than 1. Recently, the ZT coefficient of bulk materials by B.Poudeld et al. ca...

Claims

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Application Information

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IPC IPC(8): G01N33/00G01N25/00
Inventor 许胜勇高亦斌王俊逸王烨彭练矛
Owner PEKING UNIV
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