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Method for preparing La0.5Li0.5TiO3 fiber reinforced Ag based electric contact material

An electrical contact material, fiber-reinforced technology, applied in circuits, electrical components, battery electrodes, etc., can solve problems such as health hazards, achieve the effect of saving silver, improving high resistivity, and reducing consumption

Active Publication Date: 2017-05-31
QUZHOU UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the volatilization of Cd element in Ag / CdO electrical contact materials into the human body will cause great harm to health. It is a foregone conclusion that Ag / CdO materials will gradually withdraw from the market due to serious environmental problems.

Method used

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  • Method for preparing La0.5Li0.5TiO3 fiber reinforced Ag based electric contact material
  • Method for preparing La0.5Li0.5TiO3 fiber reinforced Ag based electric contact material
  • Method for preparing La0.5Li0.5TiO3 fiber reinforced Ag based electric contact material

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preparation example Construction

[0028] La 0.5 Li 0.5 TiO 3 A method for preparing a fiber-reinforced Ag-based electrical contact material, specifically comprising the steps of:

[0029] (1) Preparation of La by electrospinning 0.5 Li 0.5 TiO 3 conductive ceramic fibers, and implanted silver mirror reactions during electrospinning, the La 0.5 Li 0.5 TiO 3The surface of the fiber was modified by silver plating. The specific method of surface silver plating modification is as follows:

[0030] First, accurately weigh La(NO 3 ) 3 , Li 3 C 6 h 5 o 7 4H 2 O and Ti(C 4 h 9 O) 4 , under the assistance of ultrasonic waves, dissolve in deionized water to form a metal alkoxide solution; accurately weigh citric acid and ethylene glycol according to a certain molar ratio, dissolve in deionized water, adjust the pH with ammonia water, and configure it as a complex complexing agent Slowly add the composite complexing agent into the metal alkoxide solution, control the constant temperature with a water ba...

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Abstract

The invention discloses a method for preparing a La0.5Li0.5TiO3 fiber reinforced Ag based electrical contact material. The method includes preparation of La0.5Li0.5TiO3 conductive ceramic fiber by electrospinning, implantation of silver mirror reaction in the process of electrospinning for surface silver plating modification of the La0.5Li0.5TiO3 conductive ceramic fiber, and collection of specificall oriented silver plating La0.5Li0.5TiO3 fiber between bridge-type electrodes; immersion orientation of the silver plating La0.5Li0.5TiO3 fiber in molten Ag to form a precursor, replenishment of Ag powder for ingredient proportion, and isostatic pressing billet preparation, sintering, re-pressing, after-combustion, hot extrusion drawing molding and other successive processes to obtain the electrical contact material. A La0.5Li0.5TiO3 reinforcement phase is inlayed in an Ag matrix in the manner that fiber orientation is perpendicular to a working face, the processing stress, working current, thermal conductivity and the like of the electrical contact material all can be conducted by pure silver pathways among the La0.5Li0.5TiO3 fiber structures, and the problems of high resistivity, low elongation percentage, short electric life and the like of a Cd-free environmentally-friendly electrical contact material can be improved.

Description

technical field [0001] The invention relates to a preparation method of a novel Cd-free environmentally friendly electrical contact composite material, specifically, a method based on La 0.5 Li 0.5 TiO 3 Ag / La with Conductive Ceramic Fiber as Reinforcing Phase 0.5 Li 0.5 TiO 3 Preparation method of electrical contact material. Background technique [0002] As the core foundation of the electrical industry, electrical contact materials and components are responsible for the task of connecting and breaking currents, and their performance is directly related to the switching capacity, service life and operational reliability of the complete equipment. With the development of strategic emerging industries such as the new generation of information electronics and automation equipment manufacturing, higher and higher requirements are put forward for electrical contact components such as environmental protection, low contact resistance, resistance to welding and arc erosion, a...

Claims

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Application Information

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IPC IPC(8): H01M4/54H01M4/485
CPCH01M4/485H01M4/54Y02E60/10
Inventor 贺庆曹奇益朱冬冬倪成员童兆飞林少媚吴飞城
Owner QUZHOU UNIV
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