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End cap for magnetron, method of making the same, and magnetron

A magnetron and end cap technology, applied in the field of magnetron, can solve the problems of lowering long-term reliability, shortening life, disadvantages, etc., and achieve the effect of high yield, prolonging life, and high-efficiency manufacturing

Active Publication Date: 2015-08-19
KK TOSHIBA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, there has been caused a problem that when the end cap is fitted into the magnetron, the long-term reliability is detrimentally lowered (shortened lifetime)

Method used

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  • End cap for magnetron, method of making the same, and magnetron
  • End cap for magnetron, method of making the same, and magnetron
  • End cap for magnetron, method of making the same, and magnetron

Examples

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Embodiment

[0107] Then, embodiments of the present invention will be specifically described below with reference to the drawings and the following specific examples.

[0108] (Examples 1 to 5)

[0109] High-purity Mo powder having an average grain size of 3 μm and a purity of 99.9% or more was prepared. As a result of investigating the amount of impurity elements of this high-purity Mo powder, the amount of impurity elements (non-volatile components) was 0.08% by mass or less. As for the amount of each impurity element, the Al content is 0.005% by mass or less, the Ca content is 0.003% by mass or less, the Cr content is 0.005% by mass or less, the Cu content is 0.002% by mass or less, and the Fe content is 0.03 mass % or less, Mg content is 0.002 mass % or less, Mn content is 0.002 mass % or less, Ni content is 0.008 mass % or less, Pb content is 0.002 mass % or less, Si content is 0.005% by mass or less, the Sn content is 0.002% by mass or less, and the carbon content is 0.01% by mass...

example 1

[0123] Example 1: A1→B1→C1

example 2

[0124] Example 2: A1→B2→C2

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Abstract

Disclosed is an end hat for magnetrons which is constituted of sintered Mo, characterized in that the surface area ranging from the surface of the sintered Mo to a depth of 100 µm therefrom has a carbon content of 30 ppm or less and the central area ranging from the thickness-direction center of the sintered Mo to distances of ±100 µm therefrom has a carbon content of 50-300 ppm. By reducing the carbon content in the surface area, long-term reliability can be improved. The end hat for magnetrons which has high long-term reliability can be produced in a high yield.

Description

technical field [0001] The present invention relates to an end cap for a magnetron, a manufacturing method thereof, and a magnetron using the end cap, and more particularly, to an end cap for a magnetron, a manufacturing method thereof, and a magnetron using the same. A magnetron with end caps that can extend the lifetime of the magnetron and that can exhibit high reliability over long periods of time. Background technique [0002] As the cathode part of the magnetron is used in electric ovens (microwave ovens), the cathode part is widely known, and the cathode part is configured to mainly include: a coiled filament 1 for emitting thermoelectrons; an upper end cap 3 and a lower end cap 4 , composed of Mo and bonded to the upper and lower end portions of the coiled filament 1 by Mo-Ru brazing material 2; the central lead 5, connected and fixed to the upper end cap 3; and the side lead 6, connected and secured to the lower end cap 4. [0003] A magnetron is a dipole vacuum t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J23/04
CPCH01J25/587H01J23/05H01J23/04
Inventor 森冈勉青山齐
Owner KK TOSHIBA