A nano-transition metal oxide sensitive slurry and its preparation method and application

A transition metal, oxide technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., to achieve the effect of less cracks and defects in the film layer, good dispersion, and improved service life

Active Publication Date: 2017-07-11
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are few domestic reports on the preparation of sensitive slurry formulations for gas sensors. There are two main problems to be solved when sensitive slurry is applied to conventional sensor products: ①The preparation process and characteristics of sensitive materials and slurry conform to the coating process requirements, and simplify the coating process as much as possible; ②The gas sensitivity, stability, and consistency of the slurry and the sensitive film formed after slurry coating meet the requirements of gas sensors

Method used

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  • A nano-transition metal oxide sensitive slurry and its preparation method and application
  • A nano-transition metal oxide sensitive slurry and its preparation method and application
  • A nano-transition metal oxide sensitive slurry and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Nano WO 3 For the sensitive slurry prepared for sensitive materials, the mass percentages of each component added are respectively,

[0033] Nano WO 3 : 25%

[0034] Solvent: 50%

[0035] Moisturizer: 10%

[0036] Dispersant: 5%

[0037] Defoamer: 5%

[0038] pH regulator: 5%

[0039] Among them, Nano WO 3 The particle size of the powder is 50-200nm, the solvent is ethylene glycol, polyethylene glycol, the mass percentage of ethylene glycol:polyethylene glycol is 50%:50%, the moisturizing agent is glycerol, and the dispersant is BYK -180, the defoamer is BYK-354, and the pH regulator is 2-dimethylamino-2-methyl-1-propanol. First, weigh polyethylene glycol, ethylene glycol, and glycerol in proportion, stir with a rotary revolution mixer at 600rpm / min for 5min, and mix well; then, add WO in proportion 3 For sensitive powder materials, stir at 600rpm / min for 5min and mix evenly; finally, add BYK-180, BYK-354, 2-dimethylamino-2-methyl-1-propanol in proportion to ob...

Embodiment 2

[0043] Nano SnO 2 For the sensitive slurry prepared for sensitive materials, the mass percentages of each component added are respectively,

[0044] Nano SnO 2 : 30%

[0045] Solvent: 40%

[0046] Moisturizer: 20%

[0047] Dispersant: 5%

[0048] Defoamer: 3%

[0049] pH regulator: 2%

[0050] Among them, nano-SnO 2 The particle size of the powder is 50-70nm, the solvent is ethylene glycol, polyethylene glycol, water, the mass percentage of ethylene glycol: polyethylene glycol: water is 40%: 40%: 20%, and the moisturizing agent is acrylic acid. Triol, propylene glycol, the mass ratio of glycerol:propylene glycol is 70%:30%, the dispersant is BYK-191, the defoamer is BYK-354, and the pH regulator is ammonia water. First, weigh ethylene glycol, polyethylene glycol, water, and glycerol in proportion, stir with a rotary revolution mixer at 800rpm / min for 5min, and mix well; then, add SnO in proportion 2For sensitive powder materials, stir at 800rpm / min for 5min, and mix e...

Embodiment 3

[0053] Nano In 2 o 3 For the sensitive slurry prepared for sensitive materials, the mass percentages of each component added are respectively,

[0054] Nano In 2 o 3 : 20%

[0055] Solvent: 40%

[0056] Moisturizer: 20%

[0057] Dispersant: 10%

[0058] Defoamer: 5%

[0059] pH regulator: 5%

[0060] Among them, nano In 2 o 3 The particle size of the powder is 50-200nm, the solvent is ethylene glycol, the moisturizing agent is glycerol, the dispersant is BYK-180, the defoamer is n-octanol, and the pH regulator is 2-dimethylamino-2- Methyl-1-propanol. First, weigh ethylene glycol and glycerol in proportion, stir with a rotary revolution mixer at 400rpm / min for 5min, and mix well; then, add In 2 o 3 For sensitive powder materials, stir at 400rpm / min for 5min and mix evenly; finally, add BYK-180, n-octanol, and 2-dimethylamino-2-methyl-1-propanol in proportion to obtain a mixed slurry. Stirring at 1200rpm / min for 10min, and degassing at 1500rpm / min for 5min, the fin...

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Abstract

The invention relates to a nano-transition metal oxide sensitive slurry and a preparation method and application thereof, comprising the following steps: 1) weighing and mixing a solvent and a moisturizing agent, and stirring and mixing at a low speed with a self-rotating and revolving mixer; 2) oxidizing the nano-metal Add the powder into the obtained solvent carrier, and stir and mix at a low speed with a self-rotating and revolving mixer; 3) sequentially add a dispersant, an antifoaming agent, and a pH regulator into the obtained mixed solution, and stir and mix at a low speed with a self-rotating and revolving mixer; 4 ) stirring and mixing the obtained mixed solution with a self-rotating and revolving mixer at high speed, and then assisting high-speed degassing treatment to prepare the final nano-transition metal oxide sensitive slurry. The beneficial effects of the present invention are: 1. It is suitable for micro sensors that only need a small amount of sensitive materials, effectively reduces the power consumption and volume of the sensor, and is beneficial to the application of integrated micro smart sensors in the portable and wearable product markets. 2. It is expected to improve the service life of sensor products.

Description

technical field [0001] The invention belongs to the field of electronic paste for gas sensors, and in particular relates to a nano-transition metal oxide sensitive paste and a preparation method and application thereof. Background technique [0002] Transition metal oxides have the advantages of wide bandgap width, low price, abundant sources, environmental protection and non-toxicity, etc., and are widely used in gas sensors, photocatalysts, energy storage and conversion, drug delivery and other fields. Metal oxide semiconductor nanomaterials are important sensitive materials in gas sensors for detecting toxic and harmful gases in the environment. The research and development of sensitive materials and their slurries have extremely important guiding significance for the practical application of gas sensors. [0003] At present, there are few domestic reports on the preparation of sensitive slurry formulations for gas sensors. There are two main problems to be solved when s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00B82Y30/00
Inventor 刘善堂肖丽余庚
Owner WUHAN INSTITUTE OF TECHNOLOGY
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