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AgZrB2-Gr contact material with excellent material transfer resistance property and preparing method thereof

A contact material, zrb22.0 technology, applied in the direction of contacts, electrical components, circuits, etc., can solve the problems of rising surface temperature, increasing contact resistance, affecting the stability and service life of electrical appliances, and achieving excellent corrosion resistance Effects of high performance and welding resistance, lower sintering temperature, and excellent material transfer performance

Pending Publication Date: 2020-06-05
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional AgCdO contact material has good arc erosion resistance, excellent welding resistance, low and stable contact resistance, but its wide application is limited due to the impact of cadmium toxicity on human health and ecological environment.
Although AgSnO 2 The performance of the contact material is equivalent to that of the AgCdO contact material, but during service, Ag and SnO 2 The poor wettability between them will easily lead to the separation of two phases during service, and the formation of non-conductive ceramic SnO on the surface of the contact 2 The aggregation of particles will cause the increase of contact resistance and surface temperature, which will seriously affect the stability and service life of electrical appliances

Method used

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  • AgZrB2-Gr contact material with excellent material transfer resistance property and preparing method thereof
  • AgZrB2-Gr contact material with excellent material transfer resistance property and preparing method thereof
  • AgZrB2-Gr contact material with excellent material transfer resistance property and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1. As figure 1 , figure 2 and Figure 4 , Figure 5 As shown, a AgZrB with excellent material transfer resistance 2 -Gr contact material, consisting of the following components by mass percentage:

[0031] Ag 95.8wt.%;

[0032] ZrB 2 4.0wt.%;

[0033] Gr 0.2wt.%;

[0034] The sum of the mass percentages of the above components is 100%.

[0035] The purity of raw materials is greater than 99.99%, and the particle size of Ag powder is 72 μm; ZrB 2 Powder size 50nm;

[0036] AgZrB with excellent material transfer resistance 2 -The preparation method of the Gr contact material, the specific operation steps are as follows:

[0037] Step 1. Follow AgZrB 2 - Ag powder, Gr powder and ZrB required for calculating the composition ratio of Gr contact material 2 The amount of powder is weighed for later use.

[0038] Step 2. The weighed ZrB 2 , Gr powder is mixed in a planetary ball mill;

[0039] Step 3. Add the weighed Ag powder to the planetary ball mil...

Embodiment 2

[0049] Example 2. If image 3 As shown, a AgZrB with excellent material transfer resistance 2 -Gr contact material, the difference between this example and Example 1 is:

[0050] It consists of the following components by mass percentage:

[0051] Ag 95.6wt.%;

[0052] ZrB 2 4.0wt.%;

[0053] Gr 0.4wt.%;

[0054] The sum of the mass percentages of the above components is 100%.

[0055] The purity of raw materials is greater than 99.99%, and the particle size of Ag powder is 72 μm; ZrB 2 Powder size 50nm;

[0056] AgZrB with excellent anti-material transfer performance in Example 1 2 - The difference in the preparation method of the Gr contact material is:

[0057] In step 1, Ag powder 286.8g, ZrB 2 Powder 12g and graphene 1.2g.

[0058] In step 2, the powder mixing time in the planetary ball mill is 28 hours, the rotating speed is 370rpm, and the ball-to-material ratio is 20:1.

[0059] The time to continue mixing powder in step 3 is 4h, the rotating speed is 300r...

Embodiment 3

[0064] Example 3. A kind of AgZrB with excellent material transfer resistance 2 -Gr contact material, the difference between this example and Example 1 is that it consists of the following components by mass percentage:

[0065] Ag 97.95wt.%;

[0066] ZrB 2 2.0wt.%;

[0067] Gr 0.05wt.%;

[0068] The sum of the mass percentages of the above components is 100%.

[0069] The purity of raw materials is greater than 99.99%, and the particle size of Ag powder is 72 μm; ZrB 2 Powder size 50nm;

[0070] AgZrB with excellent anti-material transfer performance in Example 1 2 - The difference in the preparation method of the Gr contact material is:

[0071] In step 1, Ag powder 293.85g, ZrB 2 powder 6g and graphene 0.15g.

[0072] In step 2, the powder mixing time in the planetary ball mill is 10 hours, the rotating speed is 300 rpm, and the ball-to-material ratio is 10:1.

[0073] The time to continue mixing powder in step 3 is 2h, the rotating speed is 200rpm, and the ball-...

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Abstract

The invention discloses an AgZrB2-Gr contact material with an excellent material transfer resistance property and a preparing method thereof. The contact is made of 88.5 to 97.95wt.% of Ag, 2.0 to 10.0wt% of ZrB2, and 0.05 to 1.5wt% of Gr. The preparing method comprises the steps of calculating the use amount of needed Ag powder, Gr powder and ZrB2 powder according to the component proportion of the AgZrB2-Gr contact material, and weighing for standby application; carrying powder mixing on the weighed ZrB2 and Gr powder in a planetary ball mill; adding the weighed Ag powder in the planetary ball mill for continuing to powder mixing, and adding a process control agent and a dispersion agent; carrying out secondary powder mixing on the powder after ball milling on a three-dimensional vibration powder mixing machine; and placing the mixed powder in a discharge plasma sintering furnace to be sintered, furnace cooling to the room temperature, and obtaining the AgZrB2-Gr contact material. The AgZrB2-Gr contact material has the material transfer resistance property and meanwhile has the excellent electrical properties like erosion resistance and fusion welding resistance.

Description

technical field [0001] The invention belongs to the technical field of silver-based electrical contact materials, and relates to AgZrB with excellent material transfer resistance 2 -Gr contact material, and the AgZrB 2 - Preparation method of Gr contact material. Background technique [0002] As the core components of contactors, circuit breakers, relays, instruments, current limiting switches, motor protectors, micro switches, leakage protection switches, automotive electrical appliances, etc., electrical contacts are mainly responsible for connecting and disconnecting circuits and loads. The task of current, its performance directly affects the reliability, stability and service life of the electrical system operation. Therefore, electrical contact materials are required to have good electrical and thermal conductivity, excellent breaking performance, welding resistance, electrical wear resistance, low and stable contact resistance, good oxidation resistance, corrosion r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C5/06C22C32/00C22C1/05H01H1/023
CPCC22C1/05C22C5/06C22C32/0073H01H1/023
Inventor 王献辉李柯延邱艳茹李航宇唐文亭
Owner XIAN UNIV OF TECH
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