SU528632A1 - A method of manufacturing a metalpressed molded cathode - Google Patents

A method of manufacturing a metalpressed molded cathode

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Publication number
SU528632A1
SU528632A1 SU2116370A SU2116370A SU528632A1 SU 528632 A1 SU528632 A1 SU 528632A1 SU 2116370 A SU2116370 A SU 2116370A SU 2116370 A SU2116370 A SU 2116370A SU 528632 A1 SU528632 A1 SU 528632A1
Authority
SU
USSR - Soviet Union
Prior art keywords
cathode
manufacturing
metalpressed
mixture
atmosphere
Prior art date
Application number
SU2116370A
Other languages
Russian (ru)
Inventor
Яков Леонидович Вирин
Александр Васильевич Морозов
Original Assignee
Предприятие П/Я А-1067
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 Предприятие П/Я А-1067 filed Critical Предприятие П/Я А-1067
Priority to SU2116370A priority Critical patent/SU528632A1/en
Application granted granted Critical
Publication of SU528632A1 publication Critical patent/SU528632A1/en

Links

Description

леиным (в течение 0,5 ч) подъемом температуры до 150-200°С. После этого смесь запрессовывают в керн катода при удельном давлении 15 т/см и спекают при 1750°С в атмосфе ре водорода в,течение 1 мин.Lein (within 0.5 h) by raising the temperature to 150-200 ° C. After that, the mixture is pressed into the core of the cathode at a specific pressure of 15 t / cm and is sintered at 1750 ° C in a hydrogen atmosphere for 1 minute.

Катод, изготовленный по предлагаемому способу, работает без падени  тока более 3000 ч при рабочей температуре катода 1120°С и истинной плотности отбираемого тока на уровне 2,0 А/см.The cathode manufactured by the proposed method works without a current drop of more than 3000 hours at a cathode operating temperature of 1120 ° C and a true current density of 2.0 A / cm.

У прессованного катода, изготовленного известным способом, в тех же услови х работы уже через 200-250 ч срока службы имеет место падение тока 15-20%.In an extruded cathode manufactured in a known manner, under the same operating conditions, after 200-250 hours of service life, a current drop of 15-20% occurs.

Таким образом, в результате использовани  предлагаемого способа эксплуатационные характеристики прессованного металлопористого катода удаетс  довести до уровн  пропитанного металлопористого катода.Thus, as a result of using the proposed method, the performance characteristics of a molded metal-porous cathode can be brought to the level of the impregnated metal-porous cathode.

Claims (2)

1.Способ изготовлени  металлопористого прессованного катода, заключаюш,ийс  в приготовлении смеси порошков вольфрама или его сплавов с эмиссионно-активным веществом, например алюминатом бари  - кальци , запрессовке ее в керн катода и спекании, отличающийс  тем, что, с целью повыщени 1. A method of manufacturing a metalporous molded cathode, concludes with preparing a mixture of tungsten powders or its alloys with an emission-active substance, such as barium calcium aluminate, pressing it into a cathode core and sintering, characterized in that, in order to increase долговечности катода, приготовленную смесь перед запрессовкой выдерживают в атмосфере влажного углекислого газа, после чего ее высушивают в вакууме.the durability of the cathode, the mixture prepared before pressing is maintained in an atmosphere of wet carbon dioxide, after which it is dried in vacuum. 2.Способ по п. 1, отличающийс  тем, что смесь, содержащую эмиссионно-активное2. A method according to claim 1, characterized in that the mixture containing the emission-active вещество состава 3,0 ВаО, 0,5 СаО, АЬОз, выдерживают в атмосфере углекислого газа при давлении паров воды 4,5-5,0 торр и температуре 20-25°С не менее 70 ч.the substance of the composition is 3.0 BaO, 0.5 CaO, АHОз, kept in the atmosphere of carbon dioxide at a water vapor pressure of 4.5-5.0 Torr and a temperature of 20-25 ° C for at least 70 hours.
SU2116370A 1975-03-24 1975-03-24 A method of manufacturing a metalpressed molded cathode SU528632A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU2116370A SU528632A1 (en) 1975-03-24 1975-03-24 A method of manufacturing a metalpressed molded cathode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU2116370A SU528632A1 (en) 1975-03-24 1975-03-24 A method of manufacturing a metalpressed molded cathode

Publications (1)

Publication Number Publication Date
SU528632A1 true SU528632A1 (en) 1976-09-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU2116370A SU528632A1 (en) 1975-03-24 1975-03-24 A method of manufacturing a metalpressed molded cathode

Country Status (1)

Country Link
SU (1) SU528632A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5334085A (en) * 1990-02-09 1994-08-02 Thomson Tubes Electroniques Process for the manufacture of an impregnated cathode and a cathode obtained by this process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5334085A (en) * 1990-02-09 1994-08-02 Thomson Tubes Electroniques Process for the manufacture of an impregnated cathode and a cathode obtained by this process

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