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Magnetron cathode, and preparation method and application thereof

A magnetron cathode-to-weight ratio technology, applied in the direction of the cathode of the time-of-flight electron tube, can solve the problems of high raw material cost and inability to effectively eliminate cathode fracture, and achieve the goal of reducing production cost, overcoming cathode fracture, and improving brittleness Effect

Inactive Publication Date: 2013-09-11
朱惠冲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the anti-seismic performance and service life of this product have been improved compared with previous products, the defect of "cathode fracture" cannot be effectively eliminated, and the cost of raw materials is high, so it is necessary to further improve it

Method used

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  • Magnetron cathode, and preparation method and application thereof
  • Magnetron cathode, and preparation method and application thereof
  • Magnetron cathode, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Composition (weight ratio): 0.01% rhenium; 0.7% thorium; the balance is tungsten.

[0027] (1) placing rhenium slag and thorium nitrate powder in deionized water according to the above weight ratio, stirring to make it evenly dispersed in deionized water to form a suspension;

[0028] (2) The rhenium slag obtained in step (1) and the thorium nitrate powder suspension are gradually sprayed into the ammonium paratungstate powder respectively, while stirring to make the rhenium slag, thorium nitrate powder and ammonium paratungstate powder mix uniformly respectively;

[0029] (3) pressing the mixture obtained in step (2) after drying, then performing high-temperature sintering or hammer melting, and further forging into bars;

[0030] (4) drawing the bar material obtained in step (3) to obtain the magnetron cathode wire, the wire diameter is 0.4mm;

[0031] (5) The magnetron cathode wire obtained in step (4) is made into a spring shape, and the outer diameter of the sprin...

Embodiment 2

[0033] Composition (weight ratio): 0.4% rhenium; 2% thorium; the balance is tungsten.

[0034] (1) placing rhenium slag and thorium nitrate powder in deionized water according to the above weight ratio, stirring to make it evenly dispersed in deionized water to form a suspension;

[0035] (2) The rhenium slag obtained in step (1) and the thorium nitrate powder suspension are gradually sprayed into the ammonium paratungstate powder respectively, while stirring to make the rhenium slag, thorium nitrate powder and ammonium paratungstate powder mix uniformly respectively;

[0036] (3) pressing the mixture obtained in step (2) after drying, then performing high-temperature sintering or hammer melting, and further forging into bars;

[0037] (4) drawing the bar material obtained in step (3) to obtain the magnetron cathode wire, the wire diameter is 0.5mm;

[0038] (5) The magnetron cathode wire obtained in step (4) is made into a spring shape, and the outer diameter of the spring i...

Embodiment 3

[0040] Composition (weight ratio): 1.5% rhenium; 1% thorium; the balance is tungsten.

[0041] (1) placing rhenium slag and thorium nitrate powder in deionized water according to the above weight ratio, stirring to make it evenly dispersed in deionized water to form a suspension;

[0042] (2) The rhenium slag obtained in step (1) and the thorium nitrate powder suspension are gradually sprayed into the ammonium paratungstate powder respectively, while stirring to make the rhenium slag, thorium nitrate powder and ammonium paratungstate powder mix uniformly respectively;

[0043] (3) pressing the mixture obtained in step (2) after drying, then performing high-temperature sintering or hammer melting, and further forging into bars;

[0044] (4) drawing the bar material obtained in step (3) to obtain the magnetron cathode wire, the wire diameter is 0.5mm;

[0045] (5) The magnetron cathode wire obtained in step (4) is made into a spring shape, and the outer diameter of the spring i...

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Abstract

The invention provides a magnetron cathode, and a preparation method and application thereof. The magnetron cathode consists of the following components in percentage by weight: 0.01 to 3 percent of rhenium, 0.5 to 2 percent of thorium and the balance of tungsten. The brittleness of the magnetron cathode product not containing potassium is effectively improved, the defect of cathode breakage is effectively overcome, and the service life of the products is further prolonged. In addition, compared with the prior art, the magnetron cathode product has the advantages that the rhenium content is further reduced, but the performance is not influenced, so the product quality is guaranteed, the production cost is reduced, and damage to the environment is reduced. In addition, compared with the preparation process of the magnetron cathode in the prior art, the preparation method provided by the invention has the advantages that deionized water serves as a carrier of low-content rhenium and thorium, so that rhenium, thorium and tungsten are mixed uniformly, and the problem that the product performance is reduced and the service life is shortened because rhenium, thorium and tungsten are mixed not uniformly in the case of a small using amount of rhenium and thorium in the past preparation method is avoided.

Description

technical field [0001] The invention belongs to the field of electronic components, and in particular relates to a magnetron cathode and a preparation method and application thereof. Background technique [0002] The magnetron cathode was invented by the Japanese and is still in use today. It is mainly used in the preparation of microwave emission tubes and magnetrons for civilian microwave ovens. At that time, in order to realize the emissive working characteristics, a combination of two elements, thorium and tungsten, was used. However, products with this composition also have congenital defects, which have not been effectively resolved so far. The specific problems are mainly brittleness and poor high-temperature performance, which lead to uncontrollable defects in the production, transportation and use of the product. The "cathode break" defect. This defect seriously affects the reliability of the product and increases the manufacturing cost. At the same time, this de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/04H01J23/05
Inventor 朱惠冲
Owner 朱惠冲