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A device capable of rapidly and accurately detecting ambient humidity

A detection environment, accurate technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of high resistance, low sensitivity, long-term response and other problems of pure phase TiO, and achieve the effect of good detection function

Active Publication Date: 2020-07-14
中创新海(天津)认证服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The morphology of titanium oxide-based materials is controllable, and nanoparticles, nanorods, or porous structures can be generated, but pure phase TiO 2 High resistance, low sensitivity, slow response recovery, external heating source and long response time are required, which limits its application in humidity sensors

Method used

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  • A device capable of rapidly and accurately detecting ambient humidity

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preparation example Construction

[0022] The preparation process of ZnO nanoparticles of the present invention is:

[0023] Step 1: Add 0.1 mmol of zinc acetate to 92 ml of isopropanol solution, then ultrasonically shake at 55°C for 2 hours to fully dissolve the zinc acetate, and then quickly transfer the solution to an environment of 0°C for standing;

[0024] Step 2, measure 8ml of 0.02M sodium hydroxide solution, add it dropwise to the above-mentioned zinc acetate solution, and ultrasonically oscillate for 3 hours to obtain a transparent ZnO sol;

[0025] Step 3: Spin-coat the above-mentioned ZnO sol on the surface of the ceramic tube, at a speed of 1000r / min, uniform the glue for 18s, after each spin-coating, heat-treat the ceramic tube at 220°C for 12min, and repeat several times to obtain a suitable thickness. ZnO nanoparticles.

[0026] The Fe of the present invention 2 o 3 The preparation process of / graphene nanofiber is:

[0027] Step 1, configure 50ml of polyvinyl alcohol aqueous solution with a...

Embodiment

[0032] A device capable of quickly and accurately detecting environmental humidity, the device is a humidity sensor, the humidity sensor is a side heating structure, comprising: an alumina ceramic tube 22, a sensitive material layer 23 coated on the surface of the ceramic tube 22, The heating coil 24 passing through the ceramic tube 22 is provided with gold electrodes 21 at both ends of the ceramic tube 22 .

[0033] The sensitive material layer 23 includes a sensitive material I disposed on the surface of the ceramic tube, and a sensitive material II disposed on the surface of the sensitive material I; wherein, the sensitive material I is ZnO nanoparticles, and the sensitive material II is Fe 2 o 3 / Graphene nanofibers, specifically, the thickness of the sensitive material I is 0.5 mm, and the thickness of the sensitive material II is 0.7 mm.

[0034]In the above-mentioned sensitive material layer, the sensitive material I is ZnO nanoparticles, and the particle size of the Z...

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Abstract

The invention relates to an apparatus for rapidly and accurately detecting environment humidity. The apparatus is a humidity sensor, the humidity sensor is in a side-heating structure, which is composed of an alumina ceramic tube with two ends arranged with gold electrodes, a sensitive material layer coated on the surface of the ceramic tube, and a heating coil passing through the ceramic tube, the sensitive material layer is composed of a sensitive material I arranged on the surface of the ceramic tube, and a sensitive material II arranged on the surface of the sensitive material I, the sensitive material I is ZnO nano particles, and the sensitive material II is Fe2O3 / graphene nano fiber.

Description

technical field [0001] The invention relates to the technical field of humidity detection, in particular to a device capable of rapidly and accurately detecting ambient humidity. Background technique [0002] A sensor is a device or device that can sense a specified measured value and convert it into a usable output signal according to certain rules. Nowadays, the status of sensors in human life is beyond doubt. Alcohol meters, smoke detectors, fire detectors, flammable and explosive gas detectors, etc. are widely used sensors, among which humidity sensors have also been widely used to everyday life. [0003] However, the humidity sensors in existing applications have always had problems such as narrow relative humidity detection range and temperature application range, and low sensitivity. The performance of the humidity sensor depends on the humidity sensitive material. important content in the research. [0004] TiO 2 The series of materials have excellent moisture-se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/12
CPCG01N27/127
Inventor 潘柏霖
Owner 中创新海(天津)认证服务有限公司
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