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Wear-resistant high-precision thick-film silver-palladium conductor paste for oil level sensor

A technology of oil level sensor and conductor slurry, which is used in the testing of wear resistance, cable/conductor manufacturing, conductive materials dispersed in non-conductive inorganic materials, etc. , the conduction band resistance value becomes larger and other problems, to achieve the effect of ensuring reliability, improving accuracy and long-term reliability, and reducing wear and corrosion

Active Publication Date: 2022-01-18
西安宏星电子浆料科技股份有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the current silver-palladium conduction band used for the oil level sensor, when working in a special working environment for a long time, the resistance of the conduction band increases due to wear and corrosion, and the electrical signal of the oil level sensor is disordered, causing the oil gauge to indicate incorrectly. question

Method used

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  • Wear-resistant high-precision thick-film silver-palladium conductor paste for oil level sensor
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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, which do not limit the protection scope of the present invention. The protection scope of the present invention is only limited by the claims, and any omission, replacement or modification made by those skilled in the art on the basis of the disclosed embodiments of the present invention will fall within the protection scope of the present invention.

[0017] 1. Preparation of pretreated polycrystalline cubic boron nitride powder

[0018] Mix polycrystalline cubic boron nitride powder with a particle size of 1.5-2.5 μm and absolute ethanol at a mass ratio of 1:1, ultrasonicate in an ultrasonic machine for 30 minutes, ultrasonic temperature is 50°C, and ultrasonic power is 1kW, and then use a 400-mesh screen to Sieve, bake at 500° C. for 3 hours, and then sieve with a 400-mesh sieve to obtain pretreated polycrystalline cubic boron nitride powder...

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Abstract

The invention discloses wear-resistant high-precision thick-film silver-palladium conductor paste for an oil level sensor, and the silver-palladium conductor paste comprises the following components in percentage by weight: 40%-60% of silver powder, 20%-30% of palladium powder, 1%-5% of pretreated polycrystalline cubic boron nitride powder, 5%-15% of lead-free glass powder and 14%-30% of an organic carrier, wherein the pretreated polycrystalline cubic boron nitride powder is prepared from polycrystalline cubic boron nitride powder through ultrasonic and roasting processes. According to the silver-palladium conductor paste, on the basis that the cost is not increased, the pretreated polycrystalline cubic boron nitride powder is added, the surface hardness of a silver-palladium conduction band is greatly enhanced, the surface abrasion resistance of the silver-palladium conduction band is improved, product electric signal output failure caused by abrasion is reduced, and the display accuracy and the long-term working reliability of the oil level sensor oil meter for the vehicle are improved.

Description

technical field [0001] The invention belongs to the technical field of conductor paste, and in particular relates to a thick-film silver-palladium conductor paste for wear-resistant and high-precision oil level sensors, which is suitable for alumina ceramic substrates and oil level sensor products processed by thick-film circuit technology. Background technique [0002] At present, there are many types of automotive oil level sensors on the market. The automotive oil level sensor using thick film resistor circuit has the characteristics of simple structure, strong adaptability, and high cost performance, and has become the mainstream variety in the market. When the oil level sensor is working, the float rod assembly drives the contact to move, and the height signal of the oil level is output to different resistance values ​​through the contact between the contact and the conduction belt, and finally displays the amount of oil in the fuel tank on the oil dial. Therefore, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/16H01B1/22H01B13/00G01N3/56G01N33/205
CPCH01B1/16H01B1/22H01B13/00G01N3/56G01N33/205
Inventor 王顺顺薛韩英赵敏曾逸飞鹿宁
Owner 西安宏星电子浆料科技股份有限公司
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