SU111243A1 - A method of manufacturing pressed cathodes based on barium tungstate or barium tungstate-calcium - Google Patents

A method of manufacturing pressed cathodes based on barium tungstate or barium tungstate-calcium

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Publication number
SU111243A1
SU111243A1 SU572240A SU572240A SU111243A1 SU 111243 A1 SU111243 A1 SU 111243A1 SU 572240 A SU572240 A SU 572240A SU 572240 A SU572240 A SU 572240A SU 111243 A1 SU111243 A1 SU 111243A1
Authority
SU
USSR - Soviet Union
Prior art keywords
barium tungstate
calcium
tungstate
barium
cathodes based
Prior art date
Application number
SU572240A
Other languages
Russian (ru)
Inventor
А.А. Маклаков
А.И. Мельников
А.В. Морозов
Г.А. Семенов
Original Assignee
А.А. Маклаков
А.И. Мельников
А.В. Морозов
Г.А. Семенов
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 А.А. Маклаков, А.И. Мельников, А.В. Морозов, Г.А. Семенов filed Critical А.А. Маклаков
Priority to SU572240A priority Critical patent/SU111243A1/en
Application granted granted Critical
Publication of SU111243A1 publication Critical patent/SU111243A1/en

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  • Powder Metallurgy (AREA)
  • Solid Thermionic Cathode (AREA)

Description

Предметом изобретени   вл етс  способ изготовлени  прессованных катодов на основе вольфрамата бари  или вольфрамата бари -кальци  с применением в качестве восстановител  алюмини .The subject of the invention is a process for the manufacture of pressed cathodes based on barium tungstate or barium calcium tungstate using aluminum as a reducing agent.

При существующем способе алюминий вводитс  в смесь порошков вольфрама и вольфрамата бари . Затем смесь прессуетс  и спекаетс . При таком способе введени  алюмини  часто наблюдаетс  образование кратеров на поверхности катода изза резкого увеличени  объема частиц алюмиин  вследствие их термического расширени .With the existing process, aluminum is introduced into a mixture of powders of tungsten and barium tungstate. The mixture is then pressed and sintered. With this method of introducing aluminum, craters are often observed to form on the cathode surface due to a sharp increase in the volume of aluminum particles due to their thermal expansion.

Предложенный способ предусматривает введение алюмини  в порошок вольфрама с последующим спеканием их в атмосфере водорода при 700° в течение 30 минут. Порошок сплава смешиваетс  с порошком вольфрамата бари  или вольфрамата бари -кальци , смесь прессуетс  и спекаетс  обычным путем. При таком способе введени  алюмини  не .наблюдаетс  кратеров на поверхности катодов, вследствие чего последние имеют высокую эмиссионную способность и большую долговечность . При введении алюмини  указанным способом получаютс  катоды , дающие эмиссии плотностью до 10 а/см с долговечностью более 1000 часов.The proposed method involves the introduction of aluminum into tungsten powder, followed by sintering them in an atmosphere of hydrogen at 700 ° for 30 minutes. The alloy powder is mixed with the powder of barium tungstate or barium tungstate, the mixture is pressed and sintered in the usual way. With this method of introducing aluminum, there are no craters on the surface of the cathodes, as a result of which the latter have a high emissivity and greater durability. With the introduction of aluminum in this way, cathodes are obtained that give emissions with a density of up to 10 A / cm with a durability of more than 1000 hours.

Предмет изобретени Subject invention

Способ изготовлени  прессованных катодов на основе вольфрамата бари  или вольфрамата бари -кальци  с применением в качестве восстановител  алюмини , отличающийс  тем, что, с целью исключени  образовани  на эмиттируюнтеи поверхности катодов кратеров, снижающих эмиссию и долговечность катодов, алюминии вводитс  п состав смеси дл  прессовани  не непосредственно, а в виде порошкообразного его спека в необходимо пропорции с вольфрамо.м, иолуче ного прокалива) в водороде щгл 700°.A method of making pressed cathodes based on barium tungstate or barium calcium tungstate using aluminum as a reducing agent, characterized in that, in order to eliminate craters on the emitting surface of the cathodes, which reduce the emission and durability of the cathodes, aluminum is introduced directly into the composition of the mixture for pressing , and in the form of its powdery cake, in the necessary proportion with tungsten, m and calcined calcined) in 700 g of hydrogen in 700 g.

SU572240A 1957-04-30 1957-04-30 A method of manufacturing pressed cathodes based on barium tungstate or barium tungstate-calcium SU111243A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU572240A SU111243A1 (en) 1957-04-30 1957-04-30 A method of manufacturing pressed cathodes based on barium tungstate or barium tungstate-calcium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU572240A SU111243A1 (en) 1957-04-30 1957-04-30 A method of manufacturing pressed cathodes based on barium tungstate or barium tungstate-calcium

Publications (1)

Publication Number Publication Date
SU111243A1 true SU111243A1 (en) 1957-11-30

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Family Applications (1)

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SU572240A SU111243A1 (en) 1957-04-30 1957-04-30 A method of manufacturing pressed cathodes based on barium tungstate or barium tungstate-calcium

Country Status (1)

Country Link
SU (1) SU111243A1 (en)

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