JPS5512650A - Production method of indirectly-heated cathode - Google Patents

Production method of indirectly-heated cathode

Info

Publication number
JPS5512650A
JPS5512650A JP8532278A JP8532278A JPS5512650A JP S5512650 A JPS5512650 A JP S5512650A JP 8532278 A JP8532278 A JP 8532278A JP 8532278 A JP8532278 A JP 8532278A JP S5512650 A JPS5512650 A JP S5512650A
Authority
JP
Japan
Prior art keywords
cathode
alumina
ceramic layer
alumina ceramic
rhenium
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
JP8532278A
Other languages
Japanese (ja)
Inventor
Masao Okubo
Kiyoshi Sugaya
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.)
Japan Electronic Materials Corp
Original Assignee
Japan Electronic Materials Corp
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 Japan Electronic Materials Corp filed Critical Japan Electronic Materials Corp
Priority to JP8532278A priority Critical patent/JPS5512650A/en
Publication of JPS5512650A publication Critical patent/JPS5512650A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain a rigid and stable cathode having the temperature rise of 1W2 sec, by coating alumina on the face of facial heater then after heating it to produce an alumina ceramic layer jointing a cathode material to it.
CONSTITUTION: Rhenium-molybdenum or rhenium-tungsten alloy board is pressed to form a heater 1 having a circular plane section 11 and two feet 12, 13. Then alumina powder mixed with proper adhesives is coated on the face of said plane section 11 to the depth of 0.05W0.1mm and sintered under hydrogen environment of 1650°C to obtain alumina ceramic layer 2 (insulation layer). Then an adhesives containing alumina is coated on the alumina ceramic layer 2 and the nickel plate employed as cathode is adhered then heated and hardened to achieve heat-resistant jointing state. Then electro-radioactive material 4 is provided on the cathode 3.
COPYRIGHT: (C)1980,JPO&Japio
JP8532278A 1978-07-12 1978-07-12 Production method of indirectly-heated cathode Pending JPS5512650A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8532278A JPS5512650A (en) 1978-07-12 1978-07-12 Production method of indirectly-heated cathode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8532278A JPS5512650A (en) 1978-07-12 1978-07-12 Production method of indirectly-heated cathode

Publications (1)

Publication Number Publication Date
JPS5512650A true JPS5512650A (en) 1980-01-29

Family

ID=13855375

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8532278A Pending JPS5512650A (en) 1978-07-12 1978-07-12 Production method of indirectly-heated cathode

Country Status (1)

Country Link
JP (1) JPS5512650A (en)

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