Nitric oxide gas sensitive material manufacturing method, sensor, monitoring device and control method

A technology of nitrogen oxides and gas-sensitive materials, applied in electrical control, material resistance, engine control, etc., can solve the problems of reducing contact area, cracking, separation, etc., and achieve the goal of shortening sampling time, increasing sampling speed, and reducing volume Effect

Inactive Publication Date: 2014-04-30
NANJING ZHIKUO ELECTRONICS TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In this method, it is likely that the inconsistency in the shrinkage of the two materials during the sintering process will cause the electrolyte and the sensitive electrode to peel off, resulting in cracking, warping, separation, etc., which greatly reduces the three reaction interfaces (gas, oxidation, etc.

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  • Nitric oxide gas sensitive material manufacturing method, sensor, monitoring device and control method
  • Nitric oxide gas sensitive material manufacturing method, sensor, monitoring device and control method
  • Nitric oxide gas sensitive material manufacturing method, sensor, monitoring device and control method

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Embodiment Construction

[0032] Below in conjunction with embodiment the present invention will be further described.

[0033] (1) Collect Na with ethanol 2 WO 4 The effluent of the solution, and electromagnetic stirring at 40 ° C to make the ethanol volatilize until the concentration of tungstic acid reaches about 0.5mol / dm 3 , and then dropwise add polyethylene glycol (PEG) 200 while stirring until WO 3 The mass ratio of polyethylene glycol / polyethylene glycol is 1:1, and a light yellow sol is obtained; after being stored at room temperature for three days, it is volatilized under reduced pressure at 100°C to obtain a gel; , Burn at 550°C and 650°C for 3 hours, the heating rate is ≤1.5°C / min, to ensure that ethanol and polyethylene glycol (PEG) 200 are fully volatilized and reduce carbon residue; after cooling, fully grind and refine, that is, WO 3 Nano powder;

[0034] (2) Prepare 0.1mol / dm 3 Dilute 100mL of this solution with 50mL of distilled water, stir it electromagnetically for 10min, the...

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Abstract

The invention discloses a nitric oxide gas sensitive material manufacturing method, a sensor, a monitoring device and a control method. The prepared gas sensitive material is composed of a SnO2 nanometer powder body and a WO3 nanometer powder body, the sensor of the prepared nitric oxide based on the gas sensitive material comprises the gas sensitive material which is obtained according to the claim 1, an MEMS (Micro-Electromachanical) control unit, a silicon dioxide insulating layer, an electrode as well as a reference electrode, a heating wire and a thermocouple. Compared with the prior art, the nitric oxide sensor provided by the invention has the beneficial effects that the cost is low, the volume is reduced, and the energy consumption is low.

Description

technical field [0001] The invention relates to a manufacturing method of a nitrogen oxide gas sensitive material, a sensor, a monitoring device and a control method. Background technique [0002] The main structure of existing commercial NOx sensors is a multi-layer planar zirconia solid electrolyte sensor. The solid electrolyte oxygen sensor is an oxygen sensor made of solid oxygen sensitive materials as the electrolyte. Currently, the most used solid electrolyte materials are ZrO2, LiCO3, NASICON, etc. Because the solid electrolyte is in a solid state, there is no electrolyte volatilization and corrosion of electrode materials, etc. The problem is that the sensor packaging is easy, which is conducive to the miniaturization of the sensor. [0003] At present, the multi-layer planar zirconia nitrogen oxide has a large sensor volume, an expensive system, and in terms of durability, sensitivity (especially under the condition of low ppm content) and selectivity (cannot disti...

Claims

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Application Information

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IPC IPC(8): G01N27/12F02D43/00
Inventor 刘波贾蕊
Owner NANJING ZHIKUO ELECTRONICS TECH
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