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Humidity sensitivity material as well as preparation method and application thereof

A humidity sensitive device, absolute humidity technology, applied in the analysis of materials, material analysis by electromagnetic means, titanium oxide/hydroxide, etc., can solve the problems of low relative humidity, wood moisture loss, deformation, etc., and achieve low working temperature , the effect of high sensitivity

Inactive Publication Date: 2015-06-24
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the relative humidity is too low, it will also lead to the loss of wood moisture, causing deformation, cracking and damage of furniture or wooden floors; pianos, violins and other musical instruments that require high humidity cannot be used normally; cultural relics, archives and books are brittle and deformed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Manufacturing process of humidity sensitive materials and humidity sensitive devices:

[0030] Weigh 0.34 g of tetra-n-butyl titanate to prepare a 0.1 mol / L aqueous solution, weigh 0.68 g of sucrose and tetra-n-butyl titanate at a molar ratio of 2, and mix the solution evenly under stirring conditions. Transfer the mixed solution to a reaction kettle, gradually raise the temperature to 180° C., and keep the temperature for 12 hours. After the hydrothermal reaction, the reaction product was filtered by suction, washed several times, dried at 80°C, and finally sintered at 450°C for 3 hours to obtain anatase TiO 2 Nano-powder, finely ground to obtain moisture-sensitive materials with an average particle size of 10nm (calculated by Scherrer's formula).

[0031] Make the humidity sensitive material into a paste with absolute ethanol, apply it evenly on the surface of the electrode sheet, and after natural air drying, anneal at 180°C for 15 minutes to obtain the core part of...

Embodiment 2

[0034] Manufacturing process of humidity sensitive materials and humidity sensitive devices:

[0035] Weigh 3.39 kg of isopropyl titanate to prepare a 0.1 mol / L solution, weigh 6.85 kg of sucrose and tetra-n-butyl titanate with a molar ratio of 2, and mix the solution evenly under stirring conditions. Transfer the mixed solution to a reaction kettle, gradually raise the temperature to 240° C., and keep the temperature for 6 hours. After the hydrothermal reaction, the reaction product was filtered by suction, washed several times, dried at 100°C at low temperature, and finally sintered at 500°C for 2 hours to obtain anatase TiO 2 Nano-powder, finely ground to obtain moisture-sensitive materials with a particle size of 15nm.

[0036] The moisture-sensitive material is made into a paste with absolute ethanol, evenly coated on the surface of the electrode sheet, and then annealed at 240°C for 20 minutes to obtain the core part of the humidity-sensitive device—the humidity-sensiti...

Embodiment 3

[0039] Manufacturing process of humidity sensitive materials and humidity sensitive devices:

[0040] Weigh 33.98 g of tetra-n-butyl titanate to prepare a 0.1 mol / L solution, weigh 34.30 g of sucrose and tetra-n-butyl titanate with a molar ratio of 1, and mix the solution evenly under stirring conditions. Transfer the mixed solution to a reaction kettle, gradually raise the temperature to 250° C., and keep the temperature for 24 hours. After the hydrothermal reaction, the reaction product was filtered by suction, washed several times, dried at 120°C, and finally sintered at 550°C for 1.5 hours to obtain anatase TiO 2 Nano-powder, and then finely ground to produce moisture-sensitive materials.

[0041]The moisture-sensitive material is made into a paste with absolute ethanol, evenly coated on the surface of the electrode sheet, and then annealed at 250°C for 25 minutes to obtain the core part of the humidity-sensitive device—the humidity-sensitive electrode sheet. Finally, we...

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Abstract

The invention discloses a high-sensitivity humidity sensitivity material as well as preparation and an application of the high-sensitivity humidity sensitivity material as a humidity sensitivity device. According to the high-sensitivity humidity sensitivity material, the substrate is TiO2 nano powder, and the diameter is 1-20nm. The high-sensitivity humidity sensitivity material is prepared by preparing tetra-n-butyl titanate or isopropyl titanate into a 0.1-1mol / L aqueous liquid, dissolving saccharose or glucose the amount of which is 0.5-4 times that of the above aqueous liquid into the obtained liquid to obtain a mixed liquid, transferring the mixed liquid to a reaction kettle for hydrothermal reaction, carrying out vacuum filtration and washing on the reaction product, then drying at the temperature of 50-120 DEG C, and sintering at the temperature of 400-550 DEG C for 0.5-4 hours. As a newly developed humidity sensitivity material, the humidity sensitivity material disclosed by the invention has high trace steam sensitivity and low work temperature, and meets the requirement of a humidity sensitivity sensor device with a practical standard.

Description

technical field [0001] The invention belongs to the technical field of metal oxide semiconductor humidity-sensitive elements, and in particular relates to a high-sensitivity humidity-sensitive material and its preparation and application as a humidity-sensitive device. Background technique [0002] Currently commonly used hygrometers cannot measure humidity below 10%RH. [0003] In winter, stoves or radiators are used for heating in northern my country, and the heating of indoor air will lead to a decrease in indoor relative humidity. Especially in some centrally heated houses in big cities such as Beijing, due to the high room temperature, the relative humidity is often as low as below 10%. Living in such an environment, people are prone to respiratory diseases, dry mouth, cleft lip, and nosebleeds. This is because the inside of the nose, respiratory tract, lungs and reticular alveoli are covered by mucous membranes that support hair-like cilia. When the relative humidity...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053B82Y40/00G01N27/00
Inventor 林志东王辰郭春亮向腾瑞郭飞钟诚
Owner WUHAN INSTITUTE OF TECHNOLOGY
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