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Oxide cathode powder-filling device and use method thereof

An oxide cathode and powder filling technology, which is applied in cold cathode manufacturing, thermal electron cathode manufacturing, electrode system manufacturing, etc., can solve the problem that the process standard cannot be customized whether the metal powder is filled or not, the cathode nickel sponge is difficult to be uniform, and the strength is not good. Uniformity and other problems to achieve the effect of improving powder filling efficiency, simple operation, and improving uniformity

Active Publication Date: 2018-05-18
昆山国力大功率器件工业技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that in the process of pouring metal powder, because the cathode is continuously beaten manually, even experienced workers will have uneven strength, so the pore size of the prepared cathode nickel sponge is difficult to achieve uniformity. In addition, it is impossible to customize the process standard by relying on manual experience to control whether the metal powder is filled or not, and there is a great risk for quality monitoring.

Method used

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  • Oxide cathode powder-filling device and use method thereof
  • Oxide cathode powder-filling device and use method thereof
  • Oxide cathode powder-filling device and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] see Figure 1-2 , this embodiment discloses an oxide cathode powder filling device, including a cathode fixing seat 3 and a vibration device, the vibration device includes an oscillator 1, a slide rail 2 and a vibration block 4, and the oscillator 1 is provided with a cover plate 6, the cathode fixing seat 3 and the slide rail 2 are fixedly arranged on the surface of the cover plate 6 away from the oscillator 1, the slide rail 2 is arranged close to the cathode fixing seat 3, The slide rail 2 is provided with a vibration block 4, and the vibration block 4 is slidingly connected with the slide rail 2; the cathode holder 3 and the slide rail 2 are arranged on the same straight line; the oscillator 1 It is used to control the vibration of the cover plate 6 in the horizontal direction. When the cover plate 6 vibrates, it drives the vibration block 4 to move on the slide rail 2. By making the vibration block 4 continuously knock on the cathode fixing seat 3, the The powder ...

Embodiment 2

[0042] This embodiment discloses a method for using the oxide cathode powder filling device in Embodiment 1, including the following steps:

[0043]S1. Place the cathode part 10 in the cavity 7 of the sintering mold 5, then set the sintering mold 5 in the cathode holder 3, the cathode part 10 is a metal base material; the cavity 7 and the The cathode parts 10 are matched with each other, the two ends of the cathode parts 10 extend out of the cavity 7, and the cathode parts 10 are cylindrical. A gap is provided between the cathode component 10 and the cavity 7 .

[0044] S2. placing the metal powder 11 in the slot 8 of the sintering mold 5, in an optional embodiment, the metal powder 11 is nickel powder;

[0045] S3. Turn on the oscillator 1, the cover plate 6 vibrates in the horizontal direction, when the cover plate 6 vibrates, it drives the vibrating block 4 to move on the slide rail 2, and the vibrating block 4 constantly beats the cathode during the movement Fixing seat ...

Embodiment 3

[0049] Different batches of nickel powder were used for manual powder filling and mechanical powder filling, and the prepared metal sponge oxide cathode products were compared. Wherein, artificial powder filling adopts the mold of prior art to carry out powder filling operation, and mechanical powder filling adopts the powder filling device in embodiment 1 and the powder filling method in embodiment 2 to operate, adopts the follow-up of manual powder filling and mechanical powder filling The sintering steps are exactly the same.

[0050] The average pass rate of products obtained by manual powder filling and mechanical powder filling is shown in the following table:

[0051]

[0052] It can be seen that the pass rate of products obtained after powder filling by the device of the present invention is obviously higher than that of manual powder filling.

[0053] Figure 4 It is a microscope photo of the nickel sponge oxide cathode prepared by artificial powder filling, Fi...

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Abstract

The invention discloses an oxide cathode powder-filling device. The device comprises a cathode fixing seat and a vibration device; the vibration device comprises an oscillator, a slide rail and a vibration block; the oscillator is provided with a cover plate; the cathode fixing seat and the slide rail are both fixedly arranged on the surface of one side of the cover plate, wherein the one side ofthe cover plate is far away from the oscillator; the slide rail is arranged close to the cathode fixing seat; the cathode fixing seat and the slide rail are arranged on the same straight line; an opengroove is formed in the parting surface of a sintering mould; the direction of the open groove is perpendicular to the extension direction of a cavity; and the opening of one end of the open groove is linear, wherein the one end of the open groove is close to the cavity. According to the oxide cathode powder-filling device of the invention, the cathode fixing seat is continuously knocked by the vibration device, so that the powder filling of a cathode substrate is realized, and therefore, powder filling efficiency is improved. The invention also discloses a use method of the oxide cathode powder filling device. Compared with manual powder filling technology, the oxide cathode powder filling device of the present invention can improve the uniformity of powder on the surface of a cathode and improve the qualification rate of products.

Description

technical field [0001] The invention relates to a powder filling device and a using method thereof, in particular to an oxide cathode powder filling device and a using method thereof. Background technique [0002] Oxide cathode is one of the most widely used hot cathodes in electric vacuum devices. The oxide cathode is coated with a spray gun or other methods on the base metal (such as nickel, tungsten, etc.) with a layer of emission slurry composed of alkaline earth metal carbonate powder, organic solvent, binder, etc., and then in the device manufacturing process Decomposition and activation is carried out to convert the carbonate into an active substance that emits electrons, forming a good electron emitter. This kind of cathode has low operating temperature (950-1150K), high emission current density (especially in short pulse state), and is easy to mass-produce, so it is widely used in receiving tubes, picture tubes and other devices. However, because the porous coatin...

Claims

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Application Information

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IPC IPC(8): H01J9/04H01J9/06
CPCH01J9/042H01J9/06
Inventor 陈小慧黄浩
Owner 昆山国力大功率器件工业技术研究院有限公司