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Method for producing thorium-tungsten wire

A manufacturing method and thorium tungsten technology are applied in the field of thorium tungsten wire manufacturing, which can solve the problems of magnetron working characteristics and life that have great influence, tungsten coils are easy to sag and deform during the working process, and restrict the production cost of tungsten coils. Small and large deformation resistance, the effect of optimizing working performance

Inactive Publication Date: 2007-07-25
兆恒威勒(石门)钨业有限公司
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Problems solved by technology

[0009] Therefore, the above-mentioned thoriated tungsten wire has the following problems in the process of making tungsten coils: the produced thoriated tungsten wire has strong brittleness and poor toughness, and it is easy to twist or split when winding, and the helical wire of the tungsten coil is wound out. Torque will be generated and the deformation phenomenon of uneven pitch distribution will occur; the tungsten coil is easy to sag and deform during the working process
These undesirable phenomena will seriously restrict the production cost of tungsten coils, and have a great impact on the working characteristics and life of the magnetron

Method used

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Embodiment Construction

[0063] When the present invention manufactures thoriated tungsten wire, firstly, the winding performance of the thoriated tungsten wire is improved by controlling the thorium content in the thoriated tungsten wire, so as to solve undesired phenomena such as splitting and brittle fracture during the winding process of the tungsten coil:

[0064] According to the technical requirements of the thoriated tungsten cathode in the magnetron, the content of thorium dioxide is controlled between 0.7 and 1.3%, and accordingly the amount of thorium nitrate solution added to the tungsten oxide during the doping process is used to control the thorium dioxide in the thoriated tungsten wire Thorium content, the weight content of thorium dioxide in thoriated tungsten wire is controlled between 0.7 and 1.1%, which can not only ensure its ability to emit electrons but also ensure the winding performance of thoriated tungsten wire, which greatly inhibits the winding process of tungsten coils Medi...

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Abstract

The method includes following steps: adding certain quantity of solution of thorium nitrate into tungsten oxide so as to prepare doped powder of tungsten oxide; deoxidizing the obtained doped powder of tungsten oxide to obtain powder of thorium - tungsten; acid cleaning powder of thorium - tungsten to remove impurity, and producing sintered body of powder of thorium - tungsten; using press work to obtain thorium -tungsten filament with needed diameter, and content of thorium dioxide being 0.7-1.1 wt%, and enwinding thorium -tungsten filament by using wire coil; Finally, straightening filament. The invention raises the rate of finished products, and optimizes working performance of tungsten winding.

Description

technical field [0001] The invention relates to a manufacturing method of a thoriated tungsten wire for a cathode tungsten coil of a magnetron, in particular to a manufacturing method of a thoriated tungsten wire capable of improving the yield, saving costs, and optimizing the working performance of the tungsten coil. Background technique [0002] As we all know, the tungsten coil used in the cathode part of the magnetron is made of thoriated tungsten wire wound into a helical shape. It has the ability to emit electrons after being heated to a specified temperature by a current. This cathode has a short heating time and resistance Strong electron bombardment ability and so on. When the thoriated tungsten cathode in the magnetron is working, the thorium atoms generated in the cathode continuously diffuse to the surface of the tungsten wire to form a thorium atomic layer, which reduces the work function of the cathode surface and increases the radiation capacity. The layer of...

Claims

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Application Information

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IPC IPC(8): H01J9/02B22F9/16B22F3/16B21F1/02
Inventor 顾进跃袁克艳杨贺良
Owner 兆恒威勒(石门)钨业有限公司
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