Unlock instant, AI-driven research and patent intelligence for your innovation.

Sensitive material for gas-sensitive element and preparation method thereof

A technology of sensitive materials and gas-sensing components, applied in material resistance, material analysis, material analysis by electromagnetic means, etc., can solve the problems of poor working stability and low sensor sensitivity, and achieve lower resistance, higher sensitivity, and lower potential barriers. Effect

Inactive Publication Date: 2018-11-06
WUHU MATY AIR CONDITIONING EQUIP CO LTD +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a sensitive material for a gas sensor, aiming at solving the problems of low sensitivity and poor long-term working stability of the prepared sensor when the existing gas sensor sensitive material is applied to a semiconductor gas sensor

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sensitive material for gas-sensitive element and preparation method thereof
  • Sensitive material for gas-sensitive element and preparation method thereof
  • Sensitive material for gas-sensitive element and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] The present invention also proposes a method for preparing the sensitive material of the gas sensor, comprising the following steps: making SnO 2 , Sb 2 o 3 , SiO 2 , Al 2 o 3 and PdCl 2 Mix and disperse in an organic solvent to obtain a sensitive material for a gas sensor.

[0042] Further, in order to significantly promote the uniform dispersion of each component, the SnO 2 , Sb 2 o 3 , SiO 2 , Al 2 o 3 and PdCl 2 Mixing and dispersing in an organic solvent is specifically: the SnO 2 , Sb 2 o 3 , SiO 2 , Al 2 o 3 and PdCl 2 Mixing and assisted ultrasonic dispersion in organic solvents.

[0043] Further, the organic solvent is an ethanol-terpineol mixed solution.

[0044] The consistency of ethanol is low, but easily volatilizes, causes the coating process of preparing gas sensor to be more difficult, and quick volatilization easily causes cracks to appear in the sensitive film that forms, affects the performance of gas sensor; The consistency of te...

Embodiment 1

[0051] A preparation method for a gas sensor sensitive material, comprising the steps of:

[0052] Weigh SnO 2 88wt%, Sb 2 o 3 5wt%, SiO 2 2wt%, Al 2 o 3 2wt%, PdCl 2 3wt%, each component is mixed and assisted by ultrasound in a mixed solution of ethanol-terpineol with a volume ratio of 2:1 to obtain a sensitive material for a gas sensor.

[0053] Among them, the SnO 2 It is in powder form, and the particle size is 20-80nm.

[0054] The Sb 2 o 3 It is in powder form, and the particle size is 20-60nm.

[0055] The SiO 2 It is in powder form, and the particle size is 20-60nm.

[0056] The Al 2 o 3 It is in powder form, and the particle size is 40-80nm.

[0057] The obtained sensitive material of the gas sensor is prepared by coating and sintering the side-heated sintered gas sensor (for specific steps, refer to the preparation steps of the aforementioned side-heated sintered gas sensor).

Embodiment 2

[0059] A preparation method for a gas sensor sensitive material, comprising the steps of:

[0060] Weigh SnO 2 92wt%, Sb 2 o 3 4.5wt%, SiO 2 0.5wt%, Al 2 o 3 1wt%, PdCl 2 2wt%, each component is mixed and assisted by ultrasound in a mixed solution of ethanol-terpineol with a volume ratio of 2:1 to obtain a sensitive material for a gas sensor.

[0061] Among them, the SnO 2 It is in powder form, and the particle size is 20-80nm.

[0062] The Sb 2 o 3 It is in powder form, and the particle size is 20-60nm.

[0063] The SiO 2 It is in powder form, and the particle size is 20-60nm.

[0064] The Al 2 o 3 It is in powder form, and the particle size is 40-80nm.

[0065] The obtained sensitive material of the gas sensor is prepared by coating and sintering the side-heated sintered gas sensor (for specific steps, refer to the preparation steps of the aforementioned side-heated sintered gas sensor).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a sensitive material for a gas-sensitive element and a preparation method thereof. The sensitive material for the gas-sensitive element comprises the following components: 88-95wt% of SnO2, 2-5wt% of Sb2O3, 0.2-2wt% of SiO2, 0.2-2wt% of Al2O3 and 0.5-4wt% of PdCl2. According to the technical scheme, through reasonable formula design of 88-95wt% of SnO2, 2-5wt% of Sb2O3, 0.2-2wt% of SiO2, 0.2-2wt% of Al2O3 and 0.5-4wt% of PdCl2, improvement on the long-term working stability of the gas-sensitive element is facilitated; through cooperation of the SnO2, the Al2O3 and the Sb2O3, the mechanical strength, the heat stability and the chemical stability of a sensitive film are improved, the potential barrier at an interface of sensitive material particles is reduced, the resistance of the formed sensitive film is reduced, and the sensitivity is improved.

Description

technical field [0001] The invention relates to a gas sensor material, in particular to a gas sensor sensitive material and a preparation method thereof. Background technique [0002] As one of the core parts of semiconductor gas sensors, gas-sensitive materials play an important role in the actual detection ability of the sensor. In the preparation of semiconductor gas sensors, the preparation of the slurry formulation of sensitive materials is very important, which directly affects the characteristics of the sensor. At present, the formula design and preparation methods of most sensitive material slurries cannot meet the requirements of sensors, and the prepared sensors have low sensitivity and poor long-term working stability, which directly affects and limits the practical application fields of these sensors. . Contents of the invention [0003] The main purpose of the present invention is to provide a sensitive material for a gas sensor, aiming at solving the proble...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
CPCG01N27/127
Inventor 林勇罗彪张天宇
Owner WUHU MATY AIR CONDITIONING EQUIP CO LTD