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Metal-based titanium oxide nanofiber composite electrical contact material and preparation method thereof

An electrical contact material, nanofiber technology, applied in metal/alloy conductors, oxide conductors, non-metallic conductors, etc., can solve the problems of poor electrical conductivity of electrical contact materials, increased contact resistance, environmental pollution, etc. The effect of thermal conductivity, good toughness and high thermal conductivity

Active Publication Date: 2018-06-29
SICHUAN AIERFATAIKE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these reinforcing phase substances usually have poor electrical conductivity, which makes the electrical conductivity of the electrical contact material worse, which has a great impact on the performance of the electrical contact material
For example, silver-based diamond composite materials, although their hardness and wear resistance are greatly improved with the increase of diamond content, their contact resistance also increases significantly.
In addition, currently the most widely used CdO reinforcing material has seriously restricted its use due to its serious environmental pollution problems. Some European countries have legislated to ban the use of CdO in electronic materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] The aforementioned metal-based titanium oxide nanofiber composite electrical contact material, wherein the titanium oxide nanofiber is prepared by the following method:

[0033] a. Preparation of precursor solution: take 20-70wt% ethanol, 5-0wt% acetic acid, 5-30wt% titanium precursor, 1-20wt% PVP, and stir for 4-24 hours to obtain a precursor solution;

[0034] b. Preparation of titanium oxide fibers by air spinning: the precursor solution prepared in step a is subjected to air spinning at 0.1-1 MPa and a humidity of 5-75%, to obtain cotton-like titanium oxide fibers;

[0035] c. Preparation of titanium oxide nanofibers: sintering the cotton-like titanium oxide fibers obtained in step b at 200-750° C. for 1-10 hours, cooling to room temperature, and ball milling to obtain.

[0036] The metal-based titanium oxide nanofiber composite electrical contact material mentioned above, wherein the titanium precursor is organic titanium, preferably tetraisopropyl titanate, butyl ...

Embodiment 1

[0044] Composite electrical contact material: 0.02wt% of titanium oxide nanofibers, the balance being silver.

[0045] Concrete preparation steps are:

[0046] 1. Use an analytical balance to weigh 20-70wt% ethanol, 5-30wt% acetic acid, 5-30wt% titanium precursors (including organic titanium such as tetraisopropyl tertate and butyl tertate), 1-20wt% PVP , and place it in a beaker and stir on a magnetic stirrer for 4-24h to obtain a precursor solution;

[0047] 2. Ingest the prepared precursor solution with a syringe;

[0048] 3. Fix the syringe on the spinning apparatus and carry out air spinning under the pressure of 0.1-1.0MP and the humidity of 5-75%;

[0049] 4. Put the spun cotton-like titanium oxide nanofibers in a muffle furnace for sintering to 200-750°C, and keep them at 200-750°C for 1-10h;

[0050] 5. Ball milling the sintered titanium oxide nanofibers;

[0051] 6. Centrifuge and wash with water for 3 times, and dry for later use;

[0052] 7. Weigh 0.008g of th...

Embodiment 2

[0058] Composite electrical contact material: 3 wt% of titanium oxide nanofibers, and the balance is silver.

[0059] The specific preparation steps are that the solid powder weighed in step 7 in Example 1 is increased from 0.008g to 1.2g, and other steps are the same as in Example 1.

[0060] The resulting material properties:

[0061] Appearance: Silver-white metallic luster, slightly dark, smooth and even surface. Observing the microstructure with a scanning electron microscope, titanium oxide nanofibers are uniformly dispersed in the matrix metal and have good interface contact with the matrix metal.

[0062] Material properties: Composite materials have good ductility and are easy to process and shape. It is determined by electrical experiments that the composite material has good electrical conductivity, and the electrical conductivity is 37.2MS / m. It is determined by thermal experiments that its thermal conductivity is very good. Through the test of wear resistance,...

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Abstract

The invention relates to an electric contact material, in particular to a metal matrix titanium oxide nanofiber composite electric contact material and a preparation method thereof. The metal matrix titanium oxide nanofiber composite electric contact material comprises 0.02wt%-10wt% of titanium oxide nanofiber and the balance of metal matrix materials and inevitable impurities. The titanium oxide nanofiber has relatively good conductivity, so that the metal matrix titanium oxide nanofiber composite electric contact material has more excellent conductivity and heat-conducting capability than other reinforced phase composite electric contact materials. The titanium oxide nanofiber is high in hardness and wear-resistant, and has good tenacity, good stability and good anti-fusion welding ability, so that the problem of dielectric corrosion is solved after the titanium oxide nanofiber is compounded.

Description

technical field [0001] The invention relates to an electrical contact material, in particular to a metal-based titanium oxide nanofiber composite electrical contact material and a preparation method thereof. Background technique [0002] Electric contacts, also known as contacts, contacts or contacts, are contact parts in electrical switches, instruments, etc., and are responsible for the task of connecting, carrying and breaking current. Therefore, its performance directly affects switching electrical appliances and instruments. operational reliability. The electrical contact process is a complex physical process, which often requires electrical contact materials to have high electrical conductivity, low contact resistance, high thermal conductivity, high wear resistance, corrosion resistance, and impact resistance. Electrical contact materials have a history of nearly 100 years. At first, pure silver, pure gold, and pure platinum were used as contact materials. In the 194...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/02H01B1/08H01B13/00
CPCH01B1/02H01B1/08H01B13/00
Inventor 王宁陈海军
Owner SICHUAN AIERFATAIKE TECH CO LTD
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