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Preparation method of zirconia-based high-temperature humidity sensor material

A humidity sensor, zirconia-based technology, applied in the direction of air quality improvement, can solve the problem that the sensor cannot meet the requirements of temperature, humidity and mechanical properties at the same time, so as to alleviate the phenomenon of thermal hydrolysis, solve the aging phenomenon, improve the service life and The effect of reliability

Active Publication Date: 2022-01-14
CHANGZHOU LAMBDA ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the deficiency that existing sensors cannot meet the requirements of temperature, humidity and mechanical properties at the same time, the present invention provides a preparation method of zirconia-based high-temperature humidity sensor material

Method used

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  • Preparation method of zirconia-based high-temperature humidity sensor material
  • Preparation method of zirconia-based high-temperature humidity sensor material
  • Preparation method of zirconia-based high-temperature humidity sensor material

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preparation example Construction

[0029] combined with figure 1 , attached figure 2 And attached image 3 Shown, a kind of preparation method of zirconia-based high-temperature humidity sensor material, the steps of this method are:

[0030] A. Mix 10-20 parts of zirconia powder and 1 part of alumina powder according to a certain ratio to form a mixed powder; the zirconia powder is 5 mol% yttria-stabilized zirconia powder.

[0031] B. Mix 100-150 parts of mixed powder, 10-50 parts of solvent, and 1-2 parts of dispersant through a high-speed ball mill to form a blank material. The solvent is alcohol. The dispersant is herring oil.

[0032] C. Finally, the blank material is made into a zirconia ceramic plate.

[0033] The preparation method of zirconia ceramic plate is:

[0034] The blank material is made into a flat blank by a ceramic casting process; the temperature is raised to 300 in the degreasing furnace o C, the heating rate is 2 o C / min; o C / min heating up to 1400-1450 o C, keep warm for 5-10min...

specific Embodiment

[0036] A. Mix 15 parts of zirconia powder and 1 part of alumina powder according to a certain ratio to form a mixed powder; the zirconia powder is 5 mol% yttria-stabilized zirconia powder.

[0037] B. Mix 100 parts of mixed powder, 50 parts of solvent, and 1 part of dispersant through a high-speed ball mill to form a blank material. The solvent is alcohol. The dispersant is herring oil.

[0038] C. Finally, the blank material is made into a zirconia ceramic plate.

[0039] The preparation method of zirconia ceramic plate is:

[0040] The blank material is made into a flat blank by a ceramic casting process; the temperature is raised to 300 in the degreasing furnace o C, the heating rate is 2 o C / min; o C / min heating up to 1450 o C, heat preservation for 10 min for high temperature sintering; from high temperature to faster than 20 o C / min cooling rate down to 1200 o C, keep warm for 600min, and cool naturally to obtain zirconia ceramics.

[0041] Compared with the tra...

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Abstract

The invention relates to the field of sensor preparation methods, and in particular, relates to a preparation method of a zirconia-based high-temperature humidity sensor material. The method comprises the steps: A, mixing zirconium oxide powder and aluminum oxide powder into mixed powder according to a certain proportion; B, uniformly mixing the mixed powder, a solvent and a dispersing agent to form a blank material; and C, finally, preparing a zirconium oxide ceramic plate from the blank material. According to the invention, grain refinement of the zirconia-based material is realized by using the zirconia powder and the alumina powder according to the proportion and using a ceramic sintering process, so that the aging phenomenon of the high-temperature ceramic humidity sensor caused by pyrohydrolysis is solved. The pyrohydrolysis phenomenon generally existing in the high-temperature ceramic humidity sensor is relieved, so that the service life of the device is prolonged, and the reliability of the device is improved.

Description

technical field [0001] The invention relates to the field of sensor preparation methods, in particular to a preparation method of zirconia-based high-temperature humidity sensor materials. Background technique [0002] Atmospheric humidity is an important physical parameter, which is widely used in industrial and agricultural production, environmental protection, transportation and other fields. For example, in grain tobacco storage and semiconductor processing workshops, a large number of sensors are required to monitor the humidity in the environment. The detection principle of the humidity sensor is generally that the resistance or capacitance of the sensitive device changes with the amount of water layer adsorbed on the surface of the porous material, so as to establish a corresponding relationship between the two. According to the material system, it can be divided into two categories: polymer and porous ceramics. The polymer-based humidity sensor has the advantages of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/488C04B35/622C04B35/638C04B35/64
CPCC04B35/4885C04B35/622C04B35/638C04B35/64C04B2235/3225C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/668Y02A50/20
Inventor 冯江涛蒲健池波王杰
Owner CHANGZHOU LAMBDA ELECTRONICS