Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of electrical contact material including metal and metal oxide and its preparation method

An electrical contact material, oxide technology, applied in the direction of oxide conductors, metal/alloy conductors, non-metallic conductors, etc., can solve the problems of uneven structure, product size should not be too thick, unfavorable electrical properties of materials, etc. , to avoid the rich and poor areas of oxides, low cost and improve quality

Active Publication Date: 2017-09-15
SCHNEIDER ELECTRIC IND SAS
View PDF8 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] (1) The powder metallurgy method is characterized by the ability to adjust the composition of the alloy in a wide range, and can prepare contacts with uniform structure and large volume, but due to the limitation of alloy density, the electrical life of the contacts is poor
[0011] (2) The alloy internal oxidation method is characterized by high alloy density, small electrical wear of contacts, long life, and easy mass production, but the disadvantages are also obvious, that is, the product size should not be too thick, the structure is prone to inhomogeneity, and there is oxidation The disadvantages of material rich and poor areas are not good for the electrical properties of materials

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of electrical contact material including metal and metal oxide and its preparation method
  • A kind of electrical contact material including metal and metal oxide and its preparation method
  • A kind of electrical contact material including metal and metal oxide and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0055] A preparation method of an electrical contact material comprising metal and metal oxide, characterized in that the preparation method comprises the following steps:

[0056] (a) preparing a solution of a metal oxide precursor;

[0057] (b) Impregnation of metal micropowder: adding powder metallurgy metal micropowder to the solution of the metal oxide precursor, mixing evenly by means such as stirring or ultrasonic vibration, and reacting for 0.5 to 24 hours, filtering and drying to obtain The metal powder coated by the metal oxide precursor;

[0058] (c) Heat treatment: calcining the metal fine powder obtained in step (b) at 150-900°C for 1-10 hours in a non-reducing atmosphere, so as to prepare an electrical contact material including metal and metal oxide.

[0059] The metal fine powder can be silver, copper or nickel. Those skilled in the art can also select other suitable metal fine powders.

[0060] The metal oxides include SnO 2 , ZnO, CuO, In 2 o 3 、Ni 2 O...

Embodiment 1

[0069] (1) Preparation of SnO 2 Precursor solution: SnCl at 0.3 g / ml 4 Add 25% volume fraction of ammonia water dropwise to the solution until Sn(OH) is formed 4 Colloids, which are gelled by stirring and standing;

[0070] (2) Impregnation of metal powder: adding a certain amount of silver powder to Sn(OH) 4 In the colloid, stir evenly, and after 0.5 hours of reaction, filter and dry to obtain 4 coated silver powder;

[0071] (3) Heat treatment: Calcining the silver powder obtained in step (2) at 900°C for 1 hour under nitrogen gas to prepare Ag-SnO 2 electrical contact material.

[0072] After ICP-AES analysis, it shows that the content of Sn is 1.142% (weight percentage); through XRD phase analysis, it can be determined that SnO 2 The existence of; SEM / TEM analysis shows that: the silver powder particles are agglomerated, and a uniform transparent film layer has been formed on the surface of some of the silver powder particles.

[0073] figure 2 SEM / TEM photographs...

Embodiment 2

[0075] (1) Preparation of CuO precursor solution: Cu(AC) at 0.05g / ml 2 The solution is added dropwise into hot water to form a sol;

[0076] (2) Impregnation of metal powder: add a certain amount of silver powder to Cu(AC) 2 In the colloid, the ultrasonic vibration is uniform, and after 1 hour of reaction, it is filtered and dried to obtain the Cu(AC) 2 coated silver powder;

[0077] (3) Heat treatment: the silver powder obtained in step (2) was calcined at 350° C. for 5 hours under argon gas to prepare an Ag-CuO electrical contact material.

[0078] The ICP-AES analysis shows that the content of Cu is 0.2483% (weight percent); the XRD phase analysis cannot determine the existence of CuO; the SEM / TEM analysis shows that the surface of the silver powder particles is wrapped by a solid substance and adhered by it. Some particles are adsorbed on the surface of silver powder particles, and the thickness is uneven.

[0079] image 3 SEM / TEM photographs of the silver / zinc oxide...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to a preparation method of an electrical contact material including metal and metal oxide, which is characterized in that the preparation method comprises the following steps: (a) preparing a solution of a metal oxide precursor; (b) impregnating metal micropowder: Add the metal micropowder to the solution of the metal oxide precursor, mix evenly, and after reacting for 0.5 to 24 hours, filter and dry to obtain the metal micropowder covered by the metal oxide precursor; (c) heat treatment : Calcining the metal micropowder obtained in step (b) at 150-900° C. for 1 to 10 hours in a non-reducing atmosphere, so as to prepare an electrical contact material including metal and metal oxide. The invention also relates to an electrical contact material comprising metal and metal oxide produced by the preparation method.

Description

technical field [0001] The invention relates to an electric contact material and a preparation method thereof, in particular to an electric contact material including metal and metal oxide and a preparation method thereof. Background technique [0002] Metal-based electrical contact materials (such as silver-based and copper-based) are currently the most widely used electrical contact materials. In order to improve its comprehensive performance and reduce costs, it is the most common method to add different types of oxides and carbides in combination. [0003] At present, the methods for preparing composite contact materials including metal and metal oxide mainly include alloy internal oxidation method and powder metallurgy method. Powder metallurgy methods include powder mixing method, co-deposition method and ultrasonic chemical coating method. [0004] The mixed powder method is to mix the powder of metal and metal oxide, press molding and then sintering. Although this...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00H01B1/02H01B1/08
Inventor 赖奕坚刘楠赵斌元李佳周洁王垒
Owner SCHNEIDER ELECTRIC IND SAS