JPS5586044A - Cathode frame structure for electron tube - Google Patents

Cathode frame structure for electron tube

Info

Publication number
JPS5586044A
JPS5586044A JP15882578A JP15882578A JPS5586044A JP S5586044 A JPS5586044 A JP S5586044A JP 15882578 A JP15882578 A JP 15882578A JP 15882578 A JP15882578 A JP 15882578A JP S5586044 A JPS5586044 A JP S5586044A
Authority
JP
Japan
Prior art keywords
layer
coil
filament
electron emission
heating filament
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15882578A
Other languages
Japanese (ja)
Inventor
Osamu Yamazaki
Tadashi Shimizu
Ryozo Akiyama
Tatsuo Shimizu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP15882578A priority Critical patent/JPS5586044A/en
Publication of JPS5586044A publication Critical patent/JPS5586044A/en
Pending legal-status Critical Current

Links

Landscapes

  • Microwave Tubes (AREA)
  • Solid Thermionic Cathode (AREA)

Abstract

PURPOSE: To obtain the heating filaments with good electron emission characteristi and long life by forming the coil-shaped heating filament with the W-ThO2 alloy on the surface of which a carbonized layer is formed and setting the electrical resistance to 0.4W1.0μΩ per cm2.cm.
CONSTITUTION: The coil-shaped heating filament 1 of cathode structure which is used in electron tubes such as magnetrons uses the W alloy containing ThO2, for example, by 0.5W4.0 weight percentage as a base material and a carbonized layer consisting of W2C which contributes to electron emission is formed on the surface. The electrical resistance of this coil-shaped heating filament 1 ranges to 0.4W 1.0μΩ per cm2.cm. Such a filament 1 can be obtained by adjusting the gas body to be used of the process of a WC layer by performing carbonization on the surface and the process of converting the surface carbonized layer from the WC layer into a W2C layer and their heating time and temperatures. This enables the heating filament with good electron emission characteristic and long life to be obtained.
COPYRIGHT: (C)1980,JPO&Japio
JP15882578A 1978-12-22 1978-12-22 Cathode frame structure for electron tube Pending JPS5586044A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15882578A JPS5586044A (en) 1978-12-22 1978-12-22 Cathode frame structure for electron tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15882578A JPS5586044A (en) 1978-12-22 1978-12-22 Cathode frame structure for electron tube

Publications (1)

Publication Number Publication Date
JPS5586044A true JPS5586044A (en) 1980-06-28

Family

ID=15680196

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15882578A Pending JPS5586044A (en) 1978-12-22 1978-12-22 Cathode frame structure for electron tube

Country Status (1)

Country Link
JP (1) JPS5586044A (en)

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