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Composite electrically contacting silver-conducting ceramic material

A technology of electrical contact materials and conductive ceramics, applied in the direction of non-metallic conductors, oxide conductors, metal/alloy conductors, etc., can solve the problems of poor processability and temperature stability, and achieve excellent processability, good processability, and silver saving Effect

Inactive Publication Date: 2003-10-15
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a new silver-conductive ceramic composite electrical contact material in order to overcome the shortcomings of poor processability and poor temperature stability in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Ag85% by weight, conductive ceramics 15%, conductive ceramics chemical formula (Re 1-x A x )(B 1-y C y )O z , Re is La 0.9 Nd 0.1 , x is taken as 0, B is Ni, C is Fe, y is taken as 0.05, O is oxygen, z is taken as 3; the chemical formula of conductive ceramic is La 0.9 Nd 0.1 Ni 0.95 Fe 0.05 o 3 Mix and grind Ag and conductive ceramics evenly, press into large pieces, put them into a hot extrusion machine, extrude them into φ6 rods, and make contacts of various specifications by conventional methods. When processed into contacts, its density can reach 9.7g / cm 3 , hardness>680Hv, resistivity-6 Ω·cm.

Embodiment 2

[0017] Ag70% by weight, conductive ceramics 30%, the chemical formula of conductive ceramics is La 0.67 Y 0.03 Sr 0.3 MnO 3 , processing method with embodiment 1.

Embodiment 3

[0019] Ag90% by weight, conductive ceramics 10%, the chemical formula of conductive ceramics is La 0.5 Ba 0.5 CoO 3 . The Ag and conductive ceramics are mechanically mixed and molded by hot stamping, which can be made into contacts of different specifications. When processed into contacts, its density can reach 9.7g / cm 3 , hardness>680Hv, resistivity-6 Ω·cm.

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Abstract

The silver-conductive ceramics composite contact material belongs to the field of new material technology, and its main composition contains 60%-90% of silver and 40%-10% of conductive ceramics. Said invention possesses good arc-suppressing property, fusion welding resistance, loss resistance, antisticking property and silver mobility resistance, also has the low and stable contact resistance and small temp. rise.

Description

(1) Technical field [0001] The invention relates to a silver-conductive ceramic composite electrical contact material, which belongs to the technical field of new materials. (2) Background technology [0002] Silver-based alloys are widely used as electrical contact materials. Pure silver, Ag-Cu, Ag-Ni, Ag-CdO and other electrical contact materials have been used for many years. In recent years, due to the requirements of environmental protection and miniaturization, Ag-SnO 2 , Ag-rare earth alloy and other new electrical contact materials have been successfully developed and applied continuously. This type of new material advantageously improves the mechanical properties of electrical contact materials, but the contact resistance is relatively large and the processability is poor. With the miniaturization of relays, the contact force, disconnection force, and electrical gap decrease, requiring electrical contact materials to have low resistivity and stable contact resist...

Claims

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Application Information

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IPC IPC(8): H01B1/02H01B1/08
Inventor 王成建栾开政陈延学梅良模
Owner SHANDONG UNIV
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