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Adhesive layer slurry preparation material, preparation method and gas sensor

A bonding layer, slurry technology, applied in the analysis of materials, material analysis by electromagnetic means, conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problem of poor bonding strength, ceramic core cracking, gas The problem of poor tightness, etc., can improve the air tightness, reduce the sintering temperature, and match the shrinkage rate.

Active Publication Date: 2022-02-22
SUNLORD (SHANGHAI) ELECTRONICS CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The core component of the oxygen sensor and the nitrogen oxygen sensor - the multi-layer structure ceramic core, usually adopts the lamination process to stack the multi-layer YSZ electrolyte cast sheets to form the required structure. Poor bonding strength between layers can easily lead to lamination and delamination after sintering, resulting in cracking, poor air tightness, and poor mechanical properties of the ceramic core.

Method used

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  • Adhesive layer slurry preparation material, preparation method and gas sensor
  • Adhesive layer slurry preparation material, preparation method and gas sensor
  • Adhesive layer slurry preparation material, preparation method and gas sensor

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preparation example Construction

[0053] The embodiment of the present invention also provides a method for preparing adhesive layer slurry using the adhesive layer slurry preparation material, comprising the following steps:

[0054] ball milling the zirconia powder, the yttrium oxide powder, the inorganic additive, the organic solvent, and the organic additive for 12 to 36 hours to obtain a mixture;

[0055] Adding the organic vehicle and the organic additive to the mixture, and continuing ball milling for 12 to 36 hours to obtain a pre-slurry;

[0056] Filter the pre-slurry through a 100-400-mesh filter, adjust the viscosity and let it stand for at least 1 hour to obtain the adhesive layer slurry.

Embodiment 1

[0063] In this embodiment, the preparation material of the adhesive layer slurry contains the following components in mass percent:

[0064] Zirconia powder: 56.51%, D50: 0.5987μm;

[0065] Yttrium oxide powder: 2.77%, D50: 0.1624μm;

[0066] Inorganic additives: 1.52% Al 2 o 3 ~SiO2 2 , where the mass ratio of Al 2 o 3 : SiO 2 :=2:1;

[0067] Organic solvent: 32.39% mixture of terpineol, butyl glycol ether and dimethylacetamide, wherein the mass ratio of terpineol: butyl glycol ether: dimethylacetamide = 3:1:2;

[0068] Organic vehicle: 3.62% ethyl cellulose;

[0069] Organic additives: 0.64% dispersant (silane coupling agent), 1.55% plasticizer (a mixture of dibutyl phthalate and triethylene glycol diisocaprylate), 0.5% defoamer ( foam breaking polymer and polysiloxane solution), 0.5% thixotropic agent (modified urea solution).

[0070] The method steps for preparing the adhesive layer slurry and the adhesive layer by using the above materials are as follows:

[0...

Embodiment 2

[0076] In this embodiment, the preparation material of the adhesive layer slurry contains the following components in mass percent:

[0077] Zirconia powder: 53.37%, D50: 0.6491μm;

[0078] Yttrium oxide powder: 4.1%, D50: 0.1624μm;

[0079] Inorganic additives: 2.72% Al 2 o 3 ~SiO2 2 ~MgO~CaO, the mass ratio of Al 2 o 3 : SiO 2 :MgO:CaO=29:21:2:1;

[0080] Organic solvent: 29.57% mixture of terpineol, isobutanol and propyl acetate, wherein the mass ratio of terpineol:isobutanol:propyl acetate=5:1:1;

[0081] Organic carrier: 5.37% mixture of polyvinyl butyral and ethyl cellulose, wherein the mass ratio of polyvinyl butyral: ethyl cellulose = 1:1;

[0082] Organic additives: 0.92% dispersant (polyester copolymer), 2.15% plasticizer (a mixture of dibutyl phthalate and triethylene glycol diisocaprylate), 0.6% thixotropic agent ( modified urea solution), 0.8% leveling agent (polyether modified methyl alkyl polysiloxane copolymer), 0.4% lubricant (polyethylene glycol).

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Abstract

A bonding layer slurry preparation material, preparation method and gas sensor, the bonding layer slurry preparation material includes the following components in terms of mass percentage: 36% to 77% of zirconia powder; 1% of yttrium oxide powder ~7%; inorganic additives 1%~5%; organic solvents 16%~35%; organic vehicles 3%~7%; organic additives 2%~9%; At least one of cellulose, polyvinyl butyral, dioctyl adipate, dibutyl sebacate, and dibutyl phthalate. The adhesive layer slurry prepared from the adhesive layer preparation material has good leveling, adhesion and film-forming properties, and the adhesive layer prepared by using the adhesive layer slurry can especially strengthen the interlayer of YSZ cast sheet. Bond strength and sintering with other materials for oxygen and nitrogen oxygen sensors are well matched. Because the adhesive layer prepared by using the slurry has high bonding strength and matching shrinkage rate, it can be applied to oxygen sensors and nitrogen oxygen sensors, and can improve their performances such as air tightness and mechanical properties.

Description

technical field [0001] The invention relates to a preparation material of adhesive layer slurry, a preparation method and a gas sensor. Background technique [0002] Yttria-stabilized zirconia (YSZ) is a solid electrolyte with high oxygen ion conductivity at high temperature, and is widely used in oxygen sensors, nitrogen oxygen sensors, SOFC and other fields. Among them, the nitrogen and oxygen sensor chip has a heating wire inside, which realizes self-heating under the condition of external heating voltage, and the chip is heated to the working temperature. At high temperature, there are a large number of oxygen ion vacancies inside YSZ, and YSZ has high temperature conductivity at this time. When automobile exhaust (contains O 2 , NO X etc.) into the inner cavity, under the action of the metal electrode and the voltage applied at both ends of the metal electrode, the gas is detected at the three-phase interface to obtain electrons to decompose into oxygen ions. Since th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/20H01B13/00G01N27/00
CPCH01B1/20H01B13/00G01N27/00
Inventor 张宁宁贾广平李可陈可王俊郑智
Owner SUNLORD (SHANGHAI) ELECTRONICS CO
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