CN109065427A - A kind of cathode of cold magnetron - Google Patents
A kind of cathode of cold magnetron Download PDFInfo
- Publication number
- CN109065427A CN109065427A CN201810694142.0A CN201810694142A CN109065427A CN 109065427 A CN109065427 A CN 109065427A CN 201810694142 A CN201810694142 A CN 201810694142A CN 109065427 A CN109065427 A CN 109065427A
- Authority
- CN
- China
- Prior art keywords
- emission electrode
- cathode
- primary emission
- tungsten
- support tube
- 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
Links
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 27
- 239000010937 tungsten Substances 0.000 claims abstract description 27
- 150000004645 aluminates Chemical class 0.000 claims abstract description 12
- 230000000712 assembly Effects 0.000 claims abstract description 3
- 238000000429 assembly Methods 0.000 claims abstract description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 6
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Inorganic materials [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 claims description 5
- CSSYLTMKCUORDA-UHFFFAOYSA-N barium(2+);oxygen(2-) Chemical compound [O-2].[Ba+2] CSSYLTMKCUORDA-UHFFFAOYSA-N 0.000 claims description 5
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 5
- 239000000292 calcium oxide Substances 0.000 claims description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052788 barium Inorganic materials 0.000 claims 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims 1
- 239000011149 active material Substances 0.000 abstract description 4
- 230000008020 evaporation Effects 0.000 abstract description 3
- 238000001704 evaporation Methods 0.000 abstract description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 241000628997 Flos Species 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000001959 radiotherapy Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/02—Electrodes; Magnetic control means; Screens
- H01J23/04—Cathodes
- H01J23/05—Cathodes having a cylindrical emissive surface, e.g. cathodes for magnetrons
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2223/00—Details of transit-time tubes of the types covered by group H01J2225/00
- H01J2223/02—Electrodes; Magnetic control means; Screens
- H01J2223/04—Cathodes
- H01J2223/05—Cathodes having a cylindrical emissive surface, e.g. cathodes for magnetrons
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2225/00—Transit-time tubes, e.g. Klystrons, travelling-wave tubes, magnetrons
- H01J2225/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
Landscapes
- Microwave Tubes (AREA)
Abstract
The invention discloses a kind of cathodes of cold magnetron, comprising: support tube, multiple primary emission electrode assemblies and multiple secondary emission electrodes；Support tube is both ends open shape, and first end cover is packed at top ports, is packed with second end cover at bottom nozzle, the both ends of support tube are arranged with shielding cap；Secondary emission electrode is the spongy body of tungsten for being impregnated with aluminate, and secondary emission electrode is set on the periphery wall of support tube；Primary emission electrode assembly is intercalated on spongy body of tungsten, primary emission electrode assembly includes being provided with multiple support chips on primary emission electrode and primary emission electrode, one end of primary emission electrode is intercalated on spongy body of tungsten and contacts with the periphery wall of support tube, and the other end extends to the outside of spongy body of tungsten.The cathode operating temperature of the cold magnetron can be up to 1050 DEG C or so, effectively reduce the evaporation of active material, extend the working life of cathode, and then improve the service life of magnetron.
Description
Technical field
The invention belongs to microwave vacuum device arts, and in particular, to a kind of cathode of cold magnetron.
Background technique
In common high power magnetron, nickel sponge oxide-coated cathode is used.When magnetron works normally,
The electronics of emission of cathode is spinned movement in orthogonal electromagnetic field, a large amount of electron back bombardment to cathode surface, is generated a large amount of
Heat keeps the surface temperature of cathode very high, even if the heated filament of oxide-coated cathode does not work, the temperature of cathode surface is also above oxygen
850 DEG C of the normal operating temperature of compound cathode, evaporates the active material of cathode largely, greatly shortens cathode life.To wave
And the service life to magnetron.Use high power magnetron as the linear accelerator of microwave power source, in non-destructive testing, hospital
The fields such as radiotherapy, food baking are widely used.The service life of general high power magnetron was at 250 hours or so, and magnetron
It is expensive, often replacement, which affects, works normally and causes the increase of use cost, limits magnetron as high-power
Microwave source is widely applied.
Summary of the invention
The object of the present invention is to provide a kind of cathode of cold magnetron, the cathode operating temperatures of the cold magnetron
Can up to 1050 DEG C or so, the evaporation of active material is effectively reduced, the working life of cathode is extended, and then improves magnetic control
The service life of pipe.
To achieve the goals above, the present invention provides a kind of cathodes of cold magnetron, comprising: support tube, multiple
Primary emission electrode assembly and multiple secondary emission electrodes；The support tube is both ends open shape, and the is packed at top ports
Second end cover is packed at one end cap, bottom nozzle, the both ends of the support tube are arranged with shielding cap；
The secondary emission electrode is the spongy body of tungsten for being impregnated with aluminate, and the secondary emission electrode be set to it is described
On the periphery wall of support tube；
The primary emission electrode assembly is intercalated on the spongy body of tungsten, and the primary emission electrode assembly includes primary
Multiple support chips are provided on emission electrode and the primary emission electrode, one end of the primary emission electrode is intercalated in institute
It states on spongy body of tungsten and is contacted with the periphery wall of the support tube, the other end extends to the outside of the spongy body of tungsten.
Preferably, the support chip is set to one end of the primary emission electrode and is embedded in the spongy body of tungsten.
Preferably, the spongy body of tungsten for being impregnated with aluminate is three-dimensional circular sponge, and described three-dimensional circular extra large
Silk floss is sheathed on the periphery wall of the support tube.
Preferably, the porosity of the three-dimensional circular sponge is 21~25%.
Preferably, the composition of the aluminate includes barium monoxide, calcium oxide and aluminum oxide；And the barium monoxide, oxygen
The molar ratio for changing calcium and aluminum oxide is 2.2-2.5:0.5-0.8:1.
Preferably, being processed by the tungsten sheet metal with a thickness of 0.01-0.03mm for the primary emission electrode is made.
Preferably, the support chip is processed by the molybdenum piece with a thickness of 0.05-0.08mm and is made.
Preferably, the quantity of the primary emission electrode assembly is 4-7, further, the primary emission electrode assembly
Quantity be 5.
Preferably, the quantity of the secondary emission electrode is 4-8；Further, the quantity of the secondary emission electrode is
6。
Preferably, the primary emission electrode is made of 1 primary emission electrode and 2 support chips.
According to the above technical scheme, the cathode of cold magnetron provided in the present invention be by primary emission electrode and time
Grade emission electrode composition, and secondary emission electrode is the spongy body of tungsten for being impregnated with aluminate.And it is impregnated with the tungsten sponge of aluminate
Its operating temperature can reach 1050 DEG C when body is as secondary emission electrode, significantly larger than traditional nickel sponge oxide yin
Pole can effectively reduce the evaporation of active material, extend the working life of cathode, and then improve the use longevity of magnetron
Life.
Other feature and advantage of invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the cathode of cold magnetron provided in the present invention.
Fig. 2 is the structural schematic diagram of primary emission electrode assembly.
Description of symbols
1, primary emission electrode assembly 2, secondary emission electrode
3, shielding cap 4, first end cover
5, second end cover 6, support tube
7, primary emission electrode 8, support chip
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
In the present invention, in the absence of explanation to the contrary, the noun of locality that " upper and lower, top, bottom " etc. is included in the term
Only represent orientation of the term under normal service condition, or be those skilled in the art understand that be commonly called as, and be not construed as pair
The limitation of the term.
A kind of cathode of cold magnetron provided in the present invention, referring to Fig. 1, the structure of the cathode includes: support tube
6, multiple primary emission electrode assemblies 1 and multiple secondary emission electrodes 2；The support tube 6 is both ends open shape, at top ports
It is packed with first end cover 4, is packed with second end cover 5 at bottom nozzle, the both ends of the support tube 6 are arranged with shielding cap 3；
The secondary emission electrode 2 is the spongy body of tungsten for being impregnated with aluminate, and the secondary emission electrode 2 is set to institute
On the periphery wall for stating support tube 6；
The primary emission electrode assembly 1 is intercalated on the spongy body of tungsten, and the primary emission electrode assembly 1 includes just
Multiple support chips 8 are provided on grade emission electrode 7 and the primary emission electrode 7, one end of the primary emission electrode 7 is embedding
It inserts on the spongy body of tungsten and is contacted with the periphery wall of the support tube 6, the other end extends to the outside of the spongy body of tungsten.
In a kind of specific embodiment, referring to fig. 2, the primary emission electrode assembly 1 includes 8 He of primary emission electrode
Support chip 8；The support chip 8 is set to along the periphery wall of primary emission electrode one end, and the support chip 8 with it is described
One end of primary emission electrode 7 is embedded in the spongy body of tungsten.
In a kind of specific embodiment, the spongy body of tungsten for being impregnated with aluminate is three-dimensional circular sponge, and institute
Three-dimensional circular sponges cover is stated to be set on the periphery wall of the support tube 6；The porosity of the three-dimensional circular sponge is 21~
25%.In addition, in order to improve the working effect of the cathode of cold magnetron and working life, the composition of the aluminate includes
Barium monoxide, calcium oxide and aluminum oxide；And the molar ratio of the barium monoxide, calcium oxide and aluminum oxide is 2.2-2.5:
0.5-0.8:1.
In a kind of specific embodiment, in order to improve working effect and the work of the cathode for improving cold magnetron
Service life, being processed by the tungsten sheet metal with a thickness of 0.01-0.03mm for the primary emission electrode 7 are made.
Equally, the support chip 8 is processed by the molybdenum piece with a thickness of 0.05-0.08mm and is made.
In the specific implementation process, the quantity of the primary emission electrode assembly 1 is 4-7, it is preferable that, the primary hair
The quantity for penetrating electrode assembly 1 is 5.
The quantity of the secondary emission electrode is 4-8；Preferably, the quantity of the secondary emission electrode is 6.
Referring to fig. 2, specifically, the primary emission electrode 7 is made of 1 support chip of primary emission electrode 7 and 28；It is described
Support chip 8 is set to one end of the primary emission electrode 7.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited to above-mentioned realities
The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical solution of the present invention
Monotropic type, these simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (10)
1. a kind of cathode of cold magnetron characterized by comprising support tube (6), multiple primary emission electrode assemblies
(1) and multiple secondary emission electrodes (2)；The support tube (6) is both ends open shape, is packed with first end cover at top ports
(4), it is packed at bottom nozzle second end cover (5), the both ends of the support tube (6) are arranged with shielding cap (3)；
The secondary emission electrode (2) is the spongy body of tungsten for being impregnated with aluminate, and the secondary emission electrode (2) is set to institute
On the periphery wall for stating support tube (6)；
The primary emission electrode assembly (1) is intercalated on the spongy body of tungsten, and the primary emission electrode assembly (1) includes just
Grade emission electrode (7) and the primary emission electrode (7) on be provided with multiple support chips (8), the primary emission electrode
(7) one end is intercalated on the spongy body of tungsten and contacts with the periphery wall of the support tube (6), and the other end extends to the tungsten
The outside of cavernous body.
2. the cathode of cold magnetron according to claim 1, which is characterized in that the support chip (8) is set to institute
It states one end of primary emission electrode (7) and is embedded in the spongy body of tungsten.
3. the cathode of cold magnetron according to claim 1, which is characterized in that the tungsten sea for being impregnated with aluminate
Continuous body is three-dimensional circular sponge, and the three-dimensional circular sponges cover is set on the periphery wall of the support tube (6).
4. the cathode of cold magnetron according to claim 2, which is characterized in that the hole of the three-dimensional circular sponge
Porosity is 21~25%.
5. the cathode of cold magnetron according to claim 1, which is characterized in that the composition of the aluminate includes oxygen
Change barium, calcium oxide and aluminum oxide；And the molar ratio of the barium monoxide, calcium oxide and aluminum oxide is 2.2-2.5:0.5-
0.8:1.
6. the cathode of cold magnetron according to claim 1, which is characterized in that the primary emission electrode (7)
It is made by the tungsten sheet metal processing with a thickness of 0.01-0.03mm.
7. the cathode of cold magnetron according to claim 1, which is characterized in that the support chip (8) by with a thickness of
The molybdenum piece processing of 0.05-0.08mm is made.
8. the cathode of cold magnetron according to claim 1, which is characterized in that the primary emission electrode assembly
(1) quantity is 4-7；
Preferably, the quantity of the primary emission electrode assembly (1) is 5.
9. the cathode of cold magnetron according to claim 1, which is characterized in that the quantity of the secondary emission electrode
For 4-8；
Preferably, the quantity of the secondary emission electrode is 6.
10. the cathode of cold magnetron according to claim 1, which is characterized in that the primary emission electrode (7) by
1 primary emission electrode (7) and 2 support chips (8) composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810694142.0A CN109065427A (en) | 2018-06-29 | 2018-06-29 | A kind of cathode of cold magnetron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810694142.0A CN109065427A (en) | 2018-06-29 | 2018-06-29 | A kind of cathode of cold magnetron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109065427A true CN109065427A (en) | 2018-12-21 |
Family
ID=64817948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810694142.0A Pending CN109065427A (en) | 2018-06-29 | 2018-06-29 | A kind of cathode of cold magnetron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109065427A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1052748A (en) * | 1989-12-22 | 1991-07-03 | 国营国光电子管总厂 | Magnetron cathode assembly and manufacture craft |
| JPH06510629A (en) * | 1992-04-15 | 1994-11-24 | オトクリトエ・アクツィオネルノエ・オブスシェストボ・“プルトン” | magnetron |
| JP2006040573A (en) * | 2004-07-22 | 2006-02-09 | Matsushita Electric Ind Co Ltd | Magnetron |
| CN101145490A (en) * | 2007-08-03 | 2008-03-19 | 安徽华东光电技术研究所 | TWT impregnated Ba-W cathode and its preparation method |
| CN203631480U (en) * | 2013-12-16 | 2014-06-04 | 安徽华东光电技术研究所 | Cathode structure of broadband millimeter-wave travelling wave tube |
| US20180155219A1 (en) * | 2016-12-06 | 2018-06-07 | Separation Solutions, LLC | Electrocoagulation fluid treatment system |
-
2018
- 2018-06-29 CN CN201810694142.0A patent/CN109065427A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1052748A (en) * | 1989-12-22 | 1991-07-03 | 国营国光电子管总厂 | Magnetron cathode assembly and manufacture craft |
| JPH06510629A (en) * | 1992-04-15 | 1994-11-24 | オトクリトエ・アクツィオネルノエ・オブスシェストボ・“プルトン” | magnetron |
| JP2006040573A (en) * | 2004-07-22 | 2006-02-09 | Matsushita Electric Ind Co Ltd | Magnetron |
| CN101145490A (en) * | 2007-08-03 | 2008-03-19 | 安徽华东光电技术研究所 | TWT impregnated Ba-W cathode and its preparation method |
| CN203631480U (en) * | 2013-12-16 | 2014-06-04 | 安徽华东光电技术研究所 | Cathode structure of broadband millimeter-wave travelling wave tube |
| US20180155219A1 (en) * | 2016-12-06 | 2018-06-07 | Separation Solutions, LLC | Electrocoagulation fluid treatment system |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181221 |