Method for preparing oxygen sensor external platinum electrode

A technology of oxygen sensor and manufacturing method, which is applied in the direction of electrochemical variables of materials, etc., can solve the problems of low efficiency, high cost, poor precision, etc., and achieve the effects of improving accuracy, reducing preparation cost, and saving dosage

Inactive Publication Date: 2009-04-15
深圳市日理江澍传感材料科学与工程研究院
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  • Abstract
  • Description
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Problems solved by technology

[0004] For this reason, the purpose of the present invention is to provide a new method for preparing the outer platinum electrode of the oxygen sensor, to solve the problems of poor precision, low efficiency and high cost of the existing preparation method

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  • Method for preparing oxygen sensor external platinum electrode

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Embodiment Construction

[0025] The core idea of ​​the present invention is: first prepare pure platinum electrode slurry, and pour it into the ink cup after stirring evenly, then move the ink cup to the position of the etching pattern, so that the platinum electrode slurry is injected into the etching pattern, at this time After the transfer printing silicone head is in contact with the etching pattern, the platinum paste in the etching pattern is automatically transferred to the silica gel head, and then the platinum paste attached to the transfer printing silicone head is in contact with the tubular zirconia substrate to oxidize The zirconium substrate moves and rotates around its own axis under the action of the traversing and rotating device to realize the complete pad printing on the surface.

[0026] In order to illustrate the idea and purpose of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

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Abstract

The invention discloses a method for manufacturing an external platinum electrode of a lambda sensor, comprising the following steps: A. pure platinum electrode sizing agent which has 1-10Mum of grain diameter, 50-80 percent of grain solid content and 40-60kcps of viscosity is confected; B. the pure platinum electrode sizing agent is coated on the surface of a bushing-shaped zirconia basal body by a bat printing device, so as to form an electrode film; C. the bushing-shaped zirconia which is coated with the electrode film is positioned in a high-temperature welding furnace for sintering 4-7 hours under the temperature of 1400-1600 DEG C. The invention basically solves the problems of serious sizing agent waste, uneven coating thickness of the electrode, multifarious manufacturing technologies, and the like, during the traditional preparation of the external platinum electrode and has the advantages of fast speed, good stability, high precision and easy automation realization, and the like, besides, the poriness and thickness of the shaped external platinum electrode are controllable, bonding strength of the substrate is high and the response speed is fast.

Description

Technical field: [0001] The invention relates to an outer platinum electrode of an oxygen sensor for a vehicle, in particular to a mechanically automated method for manufacturing an outer platinum electrode of an oxygen sensor. Background technique: [0002] The platinum electrode of the oxygen sensor plays a catalytic and conductive role in the oxygen sensitive response. The types of electrode materials include porous metal electrodes and oxide electrodes. At present, the most widely used electrode material is porous platinum electrode. The quality of the porous platinum electrode has a significant impact on the oxygen sensitivity and service life of the oxygen sensor, so the preparation process of the platinum electrode needs to be very strictly controlled. [0003] At present, the preparation process of the outer platinum electrode of the oxygen sensor includes: chloroplatinic acid decomposition method, sputtering method and platinum slurry method, etc. The preparation p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
Inventor 江澍林儒宏薄向辉熊孟
Owner 深圳市日理江澍传感材料科学与工程研究院
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