Composite soft form board liquid material plasma spray method for preparing gas-sensitive coating of hollow micro-nano structure

A micro-nano structure, plasma technology, applied in the coating, metal material coating process, melt spraying and other directions, can solve the problems of single coating structure and morphology, poor gas sensing performance, uncontrollable and other problems, and achieve uniform particle distribution. , Improve work efficiency, the effect of fast preparation process

Active Publication Date: 2019-01-11
YANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the problems of single and uncontrollable coating structure and appearance, poor gas-sensing performance and high cost prepared by liquid material plasma spraying technology, and provides a simple and low-cost gas-sensing coating with controllable structure and morphology and good performance. cost preparation method

Method used

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  • Composite soft form board liquid material plasma spray method for preparing gas-sensitive coating of hollow micro-nano structure
  • Composite soft form board liquid material plasma spray method for preparing gas-sensitive coating of hollow micro-nano structure
  • Composite soft form board liquid material plasma spray method for preparing gas-sensitive coating of hollow micro-nano structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Alumina was used as the insulating matrix, and a 30×10×1 mm alumina sheet was placed in deionized water and ethanol in sequence, and assisted by ultrasound, cleaned for 10 minutes, and dried at 80°C for later use. A layer of chromium with a thickness of 0.3 µm was first prepared using a metal mask pattern by vacuum coating to improve the bonding strength, and then a layer of 0.5 µm gold was vapor-deposited on the front of the alumina sheet to obtain an interdigitated electrode. On the opposite side of the alumina sheet, a layer of chromium with a thickness of 0.3 µm was first prepared by vacuum coating to improve the bonding strength, and then a layer of 0.5 µm platinum was evaporated on the front of the alumina sheet to obtain an interdigital heating electrode. That is, the sensor substrate 2 .

[0027] 2. Under magnetic stirring at 80°C, weigh 3.2 g of DL-aspartic acid and dissolve it in 360 mL of deionized water and stir for 10 min, then add 400 mL of 0.1 mol / L ...

Embodiment 2

[0031] The difference between this embodiment and Example 1 is that: 50 mL 0.3 mol / L Zn(NO 3 ) 3 solution. The spray current selected in step 4 is 412 A, H 2 With a flow rate of 4 L / min and a spraying distance of 60 mm, a hollow micro-nano-structured ZnO coating with a thickness of 20 µm was prepared, and then heat-preserved at 200 °C for 48 hours. When the test condition is 50°C, the coating is resistant to 10 ppm NO 2 The sensitivity is 32.5.

Embodiment 3

[0033] The difference between this embodiment and Example 1 is: what is added is 40 mL 0.2 mol / L Na 2 WO 4 solution. The spray current selected in step 4 is 512 A, H 2 When the flow rate is 5 L / min and the spraying distance is 75 mm, the hollow micro-nano structure WO 3 Coating, heat preservation treatment at 200°C for 48 hours. When the test conditions are room temperature, the coating is 10 ppm NO 2 The sensitivity is 16.8.

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Abstract

The invention discloses a composite soft form board liquid material plasma spray method for preparing a gas-sensitive coating of a hollow micro-nano structure and belongs to the technical fields of engineering and material science. The spray method comprises the specific steps that suspension liquid of a hollow spherical shell structure serves as a liquid material, wherein the suspension liquid issynthesized through a composite soft form board method; the gas-sensitive coating of the hollow micro-nano structure is prepared in a manner of liquid material plasma spray; and high response is madeto specific gas under the conditions of the low temperature even the room temperature, and the response/recovery time of the gas-sensitive coating is shorted, and long-time stability of the gas-sensitive coating is good. The gas-sensitive coating prepared through the method is controllable in structural appearance, high in specific surface area, good in gas-sensitive performance and low in cost.

Description

[0001] The invention discloses a composite soft template liquid material plasma spraying method for preparing a hollow micro-nano structure gas-sensitive coating, and belongs to the technical field of engineering and material science. Background technique [0002] With the development of modern industry, while enjoying the convenience brought by technology, people are also enduring various environmental problems brought about by industrial development. All kinds of harmful gases will cause great harm to human health due to the characteristics of easy diffusion, difficulty in detection, and high toxicity. For example, NO from industrial production and automobile emissions 2 It is extremely harmful to the respiratory system of humans and animals, and it is also the cause of acid rain and global warming. Therefore, real-time monitoring of various toxic and harmful gases in the human living and working environment is of great significance to the protection of the environment and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/134C23C4/11
CPCC23C4/11C23C4/134
Inventor 张超孙东进刘贵方环瑀淳
Owner YANGZHOU UNIV
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