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Tin-dioxide-base composite nano air-sensitive material and preparation method thereof

A technology of tin dioxide and gas-sensitive materials, applied in tin oxide, analytical materials, electrochemical variables of materials, etc., can solve the problem of high resistance value, achieve the effect of increasing the sensitivity K value, improving the microstructure, and facilitating adjustment

Inactive Publication Date: 2008-08-13
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventors have actually measured the characteristic parameters of the resistive gas-sensing sensing element made of the nanorod crystals and found that although the sensitivity K value is high, the resistance value in air is relatively high

Method used

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  • Tin-dioxide-base composite nano air-sensitive material and preparation method thereof
  • Tin-dioxide-base composite nano air-sensitive material and preparation method thereof
  • Tin-dioxide-base composite nano air-sensitive material and preparation method thereof

Examples

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Effect test

example 1

[0017] Weigh 1 part of tin dioxide-based nanorod grain powder and 0.5 part of tin dioxide-based nano-spherical grain powder according to the net molar (part) ratio, put them into a ball mill and grind them to disperse them evenly, and then dry them to prepare Obtain the tin dioxide-based composite nanometer gas-sensitive material of the present invention.

[0018] Using the resistive gas sensor produced by the tin dioxide-based composite nano gas-sensitive material of the present embodiment, the resistance (KΩ) value in the air and the resistance value in 500ppm ethanol, acetone, gasoline, benzene, NH 3 The sensitivity in gas varies with heating voltage parameters as shown in Table 1.

[0019] Table 1:

[0020]

example 2

[0022] Weigh 1 part of tin dioxide-based nanorod grain powder and 0.3 part of tin dioxide-based nano-spherical grain powder according to the net molar (part) ratio, put them into the airflow mixer and stir them, so that the two are evenly dispersed, and the obtained The tin dioxide-based composite nano gas sensitive material of the invention.

[0023] Using the resistive gas sensor produced by the tin dioxide-based composite nano gas-sensitive material of the present embodiment, the resistance (KΩ) value in the air and the resistance value in 500ppm ethanol, acetone, gasoline, benzene, NH 3 The sensitivity in gas varies with heating voltage parameters as shown in Table 2.

[0024] Table 2:

[0025]

example 3

[0027] Weigh 1 part of tin dioxide-based nanorod grain powder and 0.1 part of tin dioxide-based nano-spherical grain powder according to the net molar (part) ratio, put them into a ball mill and grind them to disperse them evenly, and then dry them. Obtain the tin dioxide-based composite nanometer gas-sensitive material of the present invention.

[0028] Using the resistive gas sensor produced by the tin dioxide-based composite nano gas-sensitive material of the present embodiment, the resistance (KΩ) value in the air and the resistance value in 500ppm ethanol, acetone, gasoline, benzene, NH 3 The sensitivity in gas varies with heating voltage parameters as shown in Table 3.

[0029] table 3:

[0030]

[0031] Summarize above-mentioned three specific embodiments and detection experiment result, the inventor draws the following conclusions:

[0032] The resistive gas sensor produced by using the tin dioxide-based composite nano gas sensitive material of the invention has h...

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Abstract

A composite nano air - sensitive material of tin dioxide base is prepared by mixing and dispersing uniformly one share of nano bar crystal particle powder of tin dioxide base in net value mole proportioning with 0.1 - o.5 share of nano ball crystal particle powder of tin dioxide base . The dissipative air sensitive element prepared by said material has both high sensitivity and proper resistance value .

Description

field of invention [0001] The present invention relates to the technical field of testing or analyzing materials by means of measuring the chemical or physical properties of materials, in particular to a kind of electronic element material, especially to a kind of tin dioxide (SnO 2 )-based nanometer gas sensitive material and preparation method thereof. technical background [0002] In order to improve the sensitivity and selectivity, response speed, recovery time and production cost of tin dioxide-based gas sensor, the inventors have studied tin dioxide (SnO 2 )-based nanocrystalline gas-sensing materials have carried out a lot of in-depth research. On November 5, 2004, a report on "New SnO-based Nano-Gas Sensing Materials and Preparation Methods" was submitted to the State Intellectual Property Office (application number: 200410052061.9 ) for an invention patent application. The main technical feature of this patent application is that carbon nanotubes are mixed into th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30G01N27/407C01G19/02
Inventor 陈环傅刚张麟
Owner GUANGZHOU UNIVERSITY
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