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Cathode salt, preparation method of cathode salt, barium tungsten cathode comprising cathode salt and preparation method of barium tungsten cathode

A technology of barium tungsten cathode and cathode, which is applied in the fields of barium tungsten cathode and its preparation, cathode salt and its preparation, can solve the problems such as difficulty in satisfying microwave devices and small emission current, and overcome the problems of small emission current and high emission capability Effect

Active Publication Date: 2012-08-15
HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cathode salt used in the traditional barium tungsten cathode can only provide 10A / cm in a stable working state 2 Left and right current, the emission current is small, it is difficult to meet the needs of microwave devices to develop in the direction of high power and high frequency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A cathode salt, the material ratio of its raw material components is: barium carbonate 3, calcium carbonate 0.3, aluminum powder 1.5.

[0020] A method for preparing cathode salt, comprising the following steps:

[0021] 1), dry treatment of barium carbonate, calcium carbonate, aluminum powder (both purity ≥ 99%), bake barium carbonate, calcium carbonate, aluminum powder in an oven at a temperature of 120 ° C for 8 hours;

[0022] 2), take dried barium carbonate 592g, calcium carbonate 30g, aluminum powder 40.5g according to formula quantity and pour into agate jar, and add agate ball and pure water in agate jar, according to powder material: ball: water=1 : 0.8:1 weight ratio, ball milling, fully mixed evenly;

[0023] 3) The ball-milled powder is baked in an oven at 120°C for 15 hours;

[0024] 4) Synthesis of cathode salt, the process conditions are 1200° C. in a dry hydrogen atmosphere and heat preservation for 12 minutes.

[0025] A preparation method of barium ...

Embodiment 2

[0031] A kind of cathodic salt, the ratio of the raw material components is: barium carbonate 3.5, calcium carbonate 0.5, aluminum powder 2.

[0032] A method for preparing cathode salt, comprising the following steps:

[0033] 1), dry treatment of barium carbonate, calcium carbonate, aluminum powder, bake barium carbonate, calcium carbonate, aluminum powder in oven at 140 ℃ temperature for 7h;

[0034] 2), take by weighing dry barium carbonate 690.7g, calcium carbonate 50g, aluminum powder 54g and pour in the agate jar, and add agate ball and pure water in the agate jar, by powder: ball: water=1 : 1: 1.2 weight ratio, ball milling, fully mixed evenly;

[0035] 3) The ball-milled powder is baked in an oven at 130°C for 12 hours;

[0036] 4) Synthesis of cathode salt, the process conditions are 1250° C. in a dry hydrogen atmosphere and heat preservation for 10 minutes.

[0037] A preparation method of barium tungsten cathode, comprising the following steps:

[0038] A. Plac...

Embodiment 3

[0043] A cathode salt, the material ratio of its raw material components is: barium carbonate 4, calcium carbonate 0.8, aluminum powder 2.5.

[0044] A method for preparing cathode salt, comprising the following steps:

[0045] 1) Barium carbonate, calcium carbonate, and aluminum powder are dried, and the barium carbonate, calcium carbonate, and aluminum powder are baked in an oven at a temperature of 150° C. for 8 hours;

[0046] 2), take by weighing dry barium carbonate 789.4g, calcium carbonate 80.1g, aluminum powder 67.5g and pour in the agate jar, and add agate ball and pure water in the agate jar, according to powder: ball: water =1:1.2:1.4 weight ratio, ball milling, fully mixed;

[0047] 3) The ball-milled powder is baked in an oven at 150°C for 8 hours;

[0048] 4) Synthesis of cathode salt, the process conditions are 1300° C. in a dry hydrogen atmosphere and heat preservation for 7 minutes.

[0049] A preparation method of barium tungsten cathode, comprising the f...

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Abstract

The invention discloses cathode salt, a preparation method of the cathode salt, a barium tungsten cathode comprising the cathode salt and a preparation method of the barium tungsten cathode. The cathode salt includes components, by weight, 3-4 parts of barium carbonate, 0.3-0.8 part of calcium carbonate and 1.5-2.5 parts of aluminum powder. The preparation method of the cathode salt includes weighing, ball milling, drying and synthesizing. The barium tungsten cathode prepared by the cathode salt has high emitting power which can be up to hundreds of amperes and meets the requirements of high-power and high-frequency development of microwave devices.

Description

technical field [0001] The invention relates to the technical field of microwave devices, in particular to a cathode salt and a preparation method thereof, a barium tungsten cathode containing the cathode salt and a preparation method thereof. Background technique [0002] As the "heart" of modern national defense equipment, microwave devices are developing in the direction of high power and high frequency. In this way, the cathode as the electron source of microwave devices has been tested, especially after entering the millimeter wave band and terahertz wave band. , Microwave devices have a very large demand on the current density of the electron injection, and the cathode needs to be able to provide a stable current density of tens or even hundreds of amperes per square centimeter. The active substance of the barium tungsten cathode to emit electrons, the cathode salt, largely determines the emission capability of the cathode. The cathode salt used in the traditional bar...

Claims

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Application Information

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IPC IPC(8): H01J23/04H01J9/02B22F7/04
Inventor 吴华夏邓清东贺兆昌宋田英张丽
Owner HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE
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