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Experimental device of gas-sensitive temperature property test of carbon nano tube sensor and method

A technology of carbon nanotubes and temperature characteristics, applied in the direction of material resistance, etc., can solve the problems of inability to test the temperature characteristics of carbon nanotubes, lack of temperature adjustment parts, and inability to test temperature characteristics, and achieves easy popularization and application, improved sensitivity, and simple method. Effect

Inactive Publication Date: 2010-04-14
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing carbon nanotube sensor gas-sensing temperature characteristics testing device, such as "Research on the gas-sensing properties of multi-walled carbon nanotubes" in "Vacuum Science and Technology" in September and October, 2003, Volume 23, No. 5, uses The experimental device consists of a 250ml airtight glass container, a 500ml quartz glass tube, a four-probe tester and a thermocouple. The N 2 and O 2 The main disadvantages of this device are: the lack of temperature regulation part, the temperature cannot be controlled in real time, so the test accuracy is low, and the temperature characteristics of carbon nanotubes in vacuum cannot be tested at the same time
Another example is the article "Research on Gas Sensitivity of Sensors Based on Multi-walled Carbon Nanotubes to Toluene" in "Journal of Sensing Technology", Volume 18, Issue 1, March 2005. The experimental device used consists of a closed air chamber, an air inlet valve , gas outlet valve, syringe and electrochemical analyzer, this device can only test the gas sensitivity of carbon nanotubes, not its temperature characteristics

Method used

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  • Experimental device of gas-sensitive temperature property test of carbon nano tube sensor and method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Such as figure 1As shown, an experimental device for testing the gas-sensitive temperature characteristics of a carbon nanotube sensor mainly includes a cylinder body 4, a vacuum pump 10, an AC contactor 16, a digital display regulator 17, an electric furnace 18, a thermal resistance 21, an impedance analyzer 22, etc. . The cylinder body 4 is cylindrical with a closed bottom, made of stainless steel, with a wall thickness of 6mm, an inner diameter of 100mm, and a height of 100mm. The sealing ring 2 is connected with the cylinder body 4 through the screw nut 3, so that the inside of the cylinder body 4 becomes a sealed space to withstand the internal and external air pressure and the corrosiveness of the measured gas during the experiment. The cylinder body 4 passes through the tripod 14 placed on the ground. The vacuum pump 10 communicates with one side of the cylinder through the air guide tube and through the ball valve 9, the vacuum gauge 7 and the vacuum gauge nee...

Embodiment 2

[0027] Such as figure 1 As shown, an experimental device for testing the gas-sensitive temperature characteristics of a carbon nanotube sensor is the same as in Example 1, wherein: the wall thickness of the cylinder 4 is 4mm, the inner diameter is 80mm, and the height is 80mm, and the power of the electric furnace 18 is 500W.

Embodiment 3

[0029] Such as figure 1 As shown, an experimental device for testing the gas-sensing temperature characteristics of a carbon nanotube sensor is the same as in Example 1, wherein: the wall thickness of the cylinder 4 is 5mm, the inner diameter is 90mm, and the height is 90mm.

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Abstract

An experimental device of gas-sensitive temperature property test of a carbon nano tube sensor and a method belong to the technical field of property test of the carbon nano tube sensor. The device mainly includes a cylinder, a vacuum pump, an alternating current contactor, a digital display regulator, an electric stove, a thermal resistor, an impedance analyzer and the like. By using the device, the method conducts the gas-sensitive temperature property test of the carbon nano tube on different detection gases at different temperatures. The device and the method can measure the gas-sensitive temperature property of the carbon nano tube sensor under different defected gases, find out the optimal working temperature of the carbon nano tube sensor under defected gases, have high accuracy and sensitivity of measurement, convenient operation and easy promotion and application, and the method is simple. The device and the method can be widely applied to the analysis and application of the gas-sensitive temperature property of carbon nano tube sensors for scientific research, teaching and study institutions.

Description

technical field [0001] The invention belongs to the technical field of characteristic testing of carbon nanotube sensors, and in particular relates to an experimental device and method for testing gas-sensing temperature characteristics of carbon nanotube sensors. Background technique [0002] The use of carbon nanotubes to make miniature gas sensors has the advantages of fast response, high sensitivity, low operating temperature, and small size. In recent years, some scholars have applied carbon nanotubes to the field of sensors, especially for gas detection, and have made great progress. . The gas sensor is to detect the gas by using the adsorption or chemical reaction between the gas molecules to be measured and the surface of the gas sensitive layer of the sensor to cause charge transfer, which in turn leads to changes in the electrical characteristics of the sensor. The adsorption or chemical reaction between the detected gas and carbon nanotubes must be realized at a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
Inventor 张晓星唐炬谢颜斌姚陈果刘王挺孙才新杜林
Owner CHONGQING UNIV
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