Gas sensitive material, carbon monoxide gas sensitive element adopting gas sensitive material and preparation method of carbon monoxide gas sensitive element

A technology of gas-sensitive materials and gas-sensitive elements, applied in the field of preparation of resistive semiconductor gas-sensitive elements, which can solve the problems of poor sensitivity, high cost, and low lifespan, and achieve high sensitivity, reduced volume, and long lifespan long effect

Inactive Publication Date: 2012-09-26
惠州市富济电子材料有限公司
View PDF4 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The second technical problem to be solved by the present invention is to provide a semiconductor carbon monoxide gas sensor using the novel tin dioxide gas sensor, which has the advantages of high sensitivity, fast

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
  • Gas sensitive material, carbon monoxide gas sensitive element adopting gas sensitive material and preparation method of carbon monoxide gas sensitive element
  • Gas sensitive material, carbon monoxide gas sensitive element adopting gas sensitive material and preparation method of carbon monoxide gas sensitive element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation method of the present embodiment carbon monoxide gas sensor is as follows:

[0036] (1) Preparation of heating body

[0037] The upper ceramic substrate (21) and the lower ceramic substrate (23) are prepared by tape casting, coating, and pressing forming techniques, and then printed with chromic acid on the green substrate of the upper ceramic substrate (21) by screen printing. The heating electrode (3) and the heating electrode lead (24) with lanthanum as the main body are laminated with the green body of the lower ceramic substrate (23) at a temperature of 90°C and a pressure of 16MPa, and sintered at 1500°C for 2 hours to prepare out of the heater.

[0038] (2) Preparation of the slurry used in the gas-sensitive layer

[0039] ① Weigh the inorganic powder for the gas-sensitive layer according to the mass percentage in Table 1:

[0040] Table 1

[0041] Inorganic components SnO 2 Sb 2 o 3 Pt PD CaO SiO 2 Content (%) ...

Embodiment 2

[0052] The inorganic powder used in the gas-sensitive layer of this embodiment is shown in Table 2 by mass percentage:

[0053] Table 2

[0054] Inorganic components SnO 2 Sb 2 o 3 Pt PD CaO SiO 2 Content (%) 88 5 2 3 1 1 Particle size (nm) ≤100 ≤100 Median diameter (nm) ≤50 ≤50

[0055] Other preparation steps and methods are the same as in Example 1, and will not be repeated here.

[0056] The technical index of the carbon monoxide gas sensor that present embodiment makes is as follows:

[0057] project Technical Parameters Detection rangeppm 10-3000 Working temperature °C 120-160 SensitivityuA / ppm 0.01±0.03uA / ppm Gas sensor response time S ＜10 Device recovery time S ＜40 zero drift Stability ( / year) ＜3%

Embodiment 3

[0059] The inorganic powder used in the gas-sensitive layer of this embodiment is shown in Table 3 by mass percentage:

[0060] table 3

[0061] Inorganic components SnO 2 Sb 2 o 3 Pt PD MgO SiO 2 Content (%) 94 1 1 / 2 2 Particle size (nm) ≤200 ≤100 Median diameter (nm) ≤100 ≤50

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 sizeaaaaaaaaaa
Median diameteraaaaaaaaaa
Apertureaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the field of gas sensors and relates to a novel tin dioxide gas sensitive material, a gas sensitive element adopting the novel tin dioxide gas sensitive material and a preparation method of the gas sensitive element. The tin oxide gas sensitive material consists of the following substances in percentage by mass: 88 to 94 percent of tin dioxide, 1 to 5 percent of antimony trioxide, 0.5 to 5 percent of noble metal, 0.5 to 4 percent of metallic oxides and 0.5 to 4 percent of silicon dioxide. A carbon monoxide gas sensitive element adopting the tin dioxide gas sensitive material is structurally characterized in that a bottom layer is a heating body, a gas sensitive layer made of the tin dioxide gas sensitive material is covered on the heating body, the gas sensitive layer is connected with a lead wire, and a ceramic molecular sieve is covered on the gas sensitive layer. The carbon monoxide gas sensitive element adopting the tin dioxide gas sensitive material has the advantages that the sensitivity is high, the response is fast, the measuring range is wide, the size is small, the service life is long, and the cost is low.

Description

technical field [0001] The invention belongs to the field of gas sensors, and relates to a novel tin dioxide gas-sensitive material, and also relates to a resistive semiconductor gas-sensitive element for testing the concentration of carbon monoxide in a gas using the novel tin dioxide gas-sensitive material, and also relates to the gas sensor. Method for the preparation of sensitive elements. Background technique [0002] Carbon monoxide (CO) is a colorless, odorless and non-irritating gas. The binding force between carbon monoxide and hemoglobin is 250-300 times greater than that between oxygen and hemoglobin. [0003] The dissociation speed of protein is much slower than that of oxyhemoglobin, so after poisoning, carbon monoxide has a long-lasting poisonous effect on the human body, hinders the oxygen-carrying function of hemoglobin, causes tissue hypoxia and necrosis, and endangers human life. It is a common poison that causes human poisoning and death. Therefore, carb...

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
IPC IPC(8): G01N27/26
Inventor 胡延超陈彬
Owner 惠州市富济电子材料有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap