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Low temperature co-fired porous ceramic electrode protective layer slurry and preparation method thereof

A porous ceramic, low-temperature co-firing technology, applied in ceramic products, other household appliances, household appliances, etc., can solve the problems of different pore sizes, easy peeling, limited bonding strength, etc., and achieve uniform pore size and stable micropores. The effect of structure and strong bonding strength

Inactive Publication Date: 2011-11-23
SHANGHAI YUANDENG ENVIRONMENTAL PROTECTION TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional sensor porous protective layer has the following defects: first, the bonding strength with the substrate is limited, and it is easy to peel off; second, the pore size is different, and it is easy to agglomerate, collapse or soften after a period of use, and it is difficult to maintain stable micropores structure

Method used

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  • Low temperature co-fired porous ceramic electrode protective layer slurry and preparation method thereof
  • Low temperature co-fired porous ceramic electrode protective layer slurry and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh the following micropowders whose particle size is less than 20 μm: Al 2 o 3 : 6.00g, magnesium aluminum spinel: 1.00g, zirconium xerogel powder: 2.70g, pseudoboehmite powder: 0.20g. AlF3: 0.05g, NH 4 Cl: 0.05g, fully mix the above powders evenly. Add 6ml of methyl ethyl ketone and isopropanol solvent with a volume ratio of 3:2 and 0.28ml of terpineol to the mixed powder, and ball mill for 16 hours; then add 0.48g of PVB, 0.5g of EC, 1.73ml of DEP, 0.82ml of PEG400, and ball mill for the second time 16 hours; defoaming the slurry after secondary ball milling at -0.95Mpa. Apply the defoamed slurry to the surface of the electrode, dry it at 75°C for 2 hours, and then co-fire it according to the procedure required for the co-firing of the sensor after assembly.

Embodiment 2

[0029] Weigh the following micropowders whose particle size is less than 20 μm: Al 2 o 3 : 7.0g, magnesium aluminum spinel: 0.3g, zirconium xerogel powder: 2.0g, pseudoboehmite powder: 0.56g. AlF 3 : 0.07g, NH 4 Cl: 0.07g, fully mix the above powders evenly. Add 6ml of methyl ethyl ketone and isopropanol solvent with a volume ratio of 3:2 and 0.28ml of terpineol to the mixed powder, and ball mill for 16 hours; then add 0.48g of PVB, 0.5g of EC, 1.73ml of DEP, 0.82ml of PEG400, twice Ball milling for 16 hours; defoaming the slurry after the second ball milling at -0.95Mpa. Apply the defoamed slurry to the surface of the electrode, dry it at 75°C for 2 hours, and then co-fire it according to the procedure required for the co-firing of the sensor after assembly.

Embodiment 3

[0031] Weigh the following micropowders whose particle size is less than 20 μm: Al 2 o 3 : 8.0g, magnesium aluminum spinel: 0.1g, zirconium xerogel powder: 1.0g, pseudoboehmite powder: 0.7g. AlF 3 : 0.1g, NH 4 Cl: 0.1g, fully mix the above powders evenly. Add 6ml of methyl ethyl ketone and isopropanol solvent with a volume ratio of 3:2 and 0.28ml of terpineol to the mixed powder, and ball mill for 16 hours; then add 0.48g of PVB, 0.5g of EC, 1.73ml of DEP, 0.82ml of PEG400, twice Ball milling for 16 hours; defoaming the slurry after the second ball milling at -0.95Mpa. Apply the defoamed slurry to the surface of the electrode, dry it at 75°C for 2 hours, and then co-fire it according to the procedure required for the co-firing of the sensor after assembly.

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Abstract

The invention belongs to the field of preparation of sensor electrode protective layer, and specifically provides a low temperature co-fired porous ceramic electrode protective layer slurry, comprising solid inorganic powder and an organic additive, wherein the solid inorganic powder accounts for 55%-70% of total weight, with the balance of the organic additive. The low temperature co-fired porous ceramic electrode protective layer of the invention has strong bonding strength with a substrate and is not easily spalled. Besides the low temperature co-fired porous ceramic electrode protective layer has uniform aperture size and stable micropore structure; and a preparation technology is simple.

Description

technical field [0001] The invention belongs to the field of sensor electrode protective layer preparation, and in particular relates to the composition and preparation method of the porous protective layer slurry of an engine exhaust gas monitoring sensor electrode. Background technique [0002] The sensor for motor vehicle exhaust gas detection is used in the feedback system of the electronically controlled fuel injection device of the motor vehicle, which can enable the injection device to achieve closed-loop control, accurately control the injection time and amount of fuel, and make the fuel fully combustible, which can not only reduce fuel consumption, improve power, but also effectively reduce emission pollution. During the use of exhaust gas detection sensors, impurities such as lead, sulfur, and phosphorus are contained in gasoline and engine oil, which greatly reduces the performance of the sensor, while dust, oil, silicon, and other components will block the electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B35/10C04B35/622
Inventor 李静涛陈清澈
Owner SHANGHAI YUANDENG ENVIRONMENTAL PROTECTION TECH DEV