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Collector electrode material, preparation thereof, surface treatment method, and collector comprising same

A technology for electrode materials and collectors, which is applied in the field of collector electrode materials, can solve the problems such as the inability to reduce the secondary electron coefficient of the collector, and achieve the effects of reducing the secondary electron emission coefficient, uniform shape, and high use efficiency

Active Publication Date: 2020-01-17
NO 12 RES INST OF CETC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of the above problems, the first object of the present invention is to provide a collector electrode material to solve the problem that the existing methods cannot effectively and conveniently reduce the secondary electron coefficient of the collector

Method used

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  • Collector electrode material, preparation thereof, surface treatment method, and collector comprising same
  • Collector electrode material, preparation thereof, surface treatment method, and collector comprising same

Examples

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preparation example Construction

[0038] The embodiment of the present invention also provides the preparation method of above-mentioned collector electrode material, and this preparation method comprises the following steps:

[0039] Mix copper powder and refractory metal powder, ball mill, sieve, mold, and press to form a green body;

[0040] The green body is sintered in a hydrogen atmosphere, the sintering temperature is 800-900°C, and the holding time is more than 2h;

[0041] The green body is further sintered in vacuum, the sintering temperature is 1000-1050° C., and the holding time is more than 2 hours, so as to obtain the electrode material of the multi-stage step-down collector.

[0042] It can be understood that in the preparation method, in the mixture of copper powder and refractory metal powder, the mass percentage of copper powder is 95-98wt%, and the mass percentage of refractory metal is 2-5wt%. Sintering the pressed body at a specific temperature in a hydrogen atmosphere and in a vacuum suc...

Embodiment 1

[0055] A preparation method of a collector electrode material, comprising the steps of:

[0056] 1) Weigh high-purity copper powder and molybdenum powder according to the mass ratio of 95:5, put them together with refractory metal molybdenum balls into a nylon mixing container, and ball mill and mix them on a planetary ball mill for 36 hours. Open the mixing container once every 12 hours, scrape off the powder adhering to the container wall, and continue to the next stage of ball milling;

[0057] 2) Grinding and sieving the mixed powder so that the particle size of the copper powder and molybdenum powder is 1-10 μm, loading into a mold, and pressing (cold isostatic pressing) into a green body, and the cold isostatic pressing molding pressure is 200 MPa;

[0058] 3) Put the molded biscuit into a hydrogen furnace for pre-sintering, the sintering temperature is 850°C, and the holding time is 2 hours;

[0059] 4) Put the pre-fired green body into a vacuum furnace for sintering, ...

Embodiment 2

[0064] A preparation method of a collector electrode material, comprising the steps of:

[0065] 1) Weigh high-purity copper powder and tungsten powder according to the mass ratio of 97:3, put them together with refractory metal tungsten grinding balls into a nylon mixing container, and ball mill and mix them on a planetary ball mill for 36 hours. Open the mixing container once every 12 hours, scrape off the powder adhering to the container wall, and continue to the next stage of ball milling;

[0066] 2) Grinding and sieving the mixed powder so that the particle size of the copper powder and molybdenum powder is 1-10 μm, loading into a mold, and pressing (cold isostatic pressing) into a green body, and the cold isostatic pressing molding pressure is 280 MPa;

[0067] 3) Put the molded biscuit into a hydrogen furnace for pre-sintering, the sintering temperature is 820°C, and the holding time is 2.5 hours;

[0068] 4) Put the pre-fired green body into a vacuum furnace for sint...

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Abstract

The invention discloses a collector electrode material. The electrode material refers to refractory metal-copper alloy. The refractory metal serves as a dispersed phase to be evenly dispersed in a copper matrix. The electrode material comprises, by weight, 2%-5% of the refractory metal and 95%-98% of copper. According to the collector electrode material, the ion beam surface modification technology is adopted to form a densely and evenly-distributed pointed cone microstructure on the surface of the electronic material, the secondary electron emission coefficient is effectively and convenientlylowered, and the using efficiency of the electrode with the collector electrode material is improved. The invention further discloses a preparation and surface treatment method of the collector electrode material and a collector with the collector electrode material.

Description

technical field [0001] The invention relates to the field of vacuum electronic devices. More specifically, it relates to a collector electrode material, its preparation, surface treatment method and a collector comprising the same. Background technique [0002] In TWTs including multi-stage step-down collectors, the presence of secondary electrons has a significant impact on TWT efficiency and electron return rate. Secondary electrons emitted from the collector electrode may be collected by higher potential electrodes, reducing the efficiency of the collector. If it returns to the high frequency and electron beam interaction area of ​​the traveling wave tube, it will generate large signal noise, affect the overall performance of the tube, and even cause oscillation, burn the tube, etc., which is extremely harmful. [0003] Theoretically speaking, the multi-stage step-down collector can make electrons be collected according to different speeds, that is, electrons with highe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/10C22C1/04C22C9/00C23C14/46H01J23/027H01J25/34
CPCB22F3/101B22F2999/00C22C1/0425C22C9/00C23C14/46H01J23/0275H01J25/34H01J2223/0275H01J2225/34B22F2201/013B22F2201/20
Inventor 赵世柯梁文龙王淑敏
Owner NO 12 RES INST OF CETC
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