CN107910236A - A kind of electron emitting device based on hot cathode - Google Patents
A kind of electron emitting device based on hot cathode Download PDFInfo
- Publication number
- CN107910236A CN107910236A CN201711340737.8A CN201711340737A CN107910236A CN 107910236 A CN107910236 A CN 107910236A CN 201711340737 A CN201711340737 A CN 201711340737A CN 107910236 A CN107910236 A CN 107910236A
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- Prior art keywords
- heating
- metab
- electronics
- electron
- insulation sleeve
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
- H01J1/22—Heaters
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- Electron Sources, Ion Sources (AREA)
Abstract
The present invention provides a kind of electron generating based on hot cathode, including electronics generating unit and heating unit.Heating unit includes heating component, insulation sleeve and insulating component, heating component includes multiple heating wires, and multiple through holes are provided with metab, metab and insulation sleeve nested arrangement from inside to outside, gap is equipped between metab and insulation sleeve, heating wire is located in gap, and heating wire one end is connected with metab, and the other end forms an output terminal of heating component through through hole；Insulating component sealed airspace, forms heating space；Electronics generating unit includes hot cathode and thermionic emission anode, and the heat that hot cathode is used to receive insulation sleeve produces electronics, launches under the electric field action that electronics is formed between hot cathode and thermionic emission anode.In the case where keeping internal high vacuum condition, which can provide high density electronics to ambient atmosphere environment.
Description
Technical field
The invention belongs to a kind of electron generating, and in particular to a kind of electronics based on hot cathode fills
Put.
Background technology
At present, existing electron generating is based primarily upon electron beam irradiation, glow discharge, corona discharge, dielectric impedance are put
Electricity, radio frequency discharge, slide several principles such as arc discharge and jet stream electric discharge.Wherein electron beam irradiation device structure is complicated, cost
Height causes device volume huge, X-ray is seriously polluted, it is necessary to X-ray-preventing, it is necessary to complicated high voltage power supply and acceleration tube apparatus
Safety features；By hypobaric limitation, commercial Application is difficult to continuous production and with high costs for glow discharge；Corona is put
Electricity and dielectric barrier discharge device are more demanding to voltage class, and in electron generation process, there is the ozone and nitrogen of higher concentration
The accessory substances such as oxide generate, and corona discharge assembly can produce the positive charge with electronics equivalent in addition, cause charge species not single
One；Radio frequency discharge device equally has the problems such as accessory substance generation in discharge process, and slide electric arc and jet stream electric discharge all lean on
Less air produces electronics in breakdown electrode, and sphere of action is smaller, and charge species are not single.
The content of the invention
In view of the above-mentioned problems, the present invention proposes a kind of electron generating based on hot cathode, for producing
High density electron stream, overcomes existing since the mode of the electronics of generation is more complicated, causes electron generating complicated
Technical problem.
A kind of electron generating based on hot cathode proposed by the present invention, including：Heating unit and electronics
Generating unit, heating unit are used to produce heat electronics generating unit, and electronics generating unit is used to produce simultaneously by heating
Launching electronics；
Heating unit includes metab, insulation sleeve, heating component and insulating component, and heating component includes multiple
Wire is heated, and multiple through holes are provided with metab, wherein, metab and insulation sleeve nested arrangement from inside to outside,
Gap is equipped between metab and insulation sleeve, heating wire is located in gap, and heating wire one end connects with metab
Connect, the other end forms an output terminal of heating component through through hole；
Insulating component with metab openend contact with the openend of insulation sleeve, for sealing metal base
The gap between insulation sleeve, forms heating space；
The first conducting wire and the second conducting wire are equipped with insulating component, first conducting wire one end is connected with metab, another
The first power end as heating unit is held, one end of the second conducting wire is connected with all output terminals of heating component, and the other end is made
For the second source end of heating unit；
Heating component produces bombardment electronics after powered up, and insulation sleeve generates heat under the action of electronics is bombarded.
Preferably, electron emission unit includes：Hot cathode and thermionic emission anode, wherein, thermoelectron hair
Cathode and thermionic emission anode nested arrangement from inside to outside are penetrated, is equipped between hot cathode and thermionic emission anode
Gap, hot cathode are attached to the outer surface of insulation sleeve, openend of the insulating component with hot cathode
It is empty between hot cathode and thermionic emission anode for sealing with the contact of the openend of thermionic emission anode
Gap, forms emission space；
Privates is equipped with insulating component, one end of privates is connected with hot cathode, the other end
As the first power end of electron emission unit, second source end of the thermionic emission anode as electron emission unit；
Hot cathode is used to receive the heat of insulation sleeve and produces electronics, and electronics is in hot cathode and heat
Under the action of the electric field acceleration formed between electron emission anode, penetrating electrons transmitting anode film, forms transmitting.
Preferably, thermionic emission anode is silicon nitride film.
Preferably, realize that control electronics is close by varying the voltage between thermionic emission anode and hot cathode
Degree.
Preferably, metab is provided with a through hole positioned at top and multiple through holes being centrosymmetric.
Preferably, metab, insulation sleeve and hot cathode are spherical in semicircle.
Preferably, it is the tungsten filament in incense coil shape to heat wire.
Preferably, incense coil shape tungsten filament line footpath is in 0.5mm~5mm.Tungsten filament is not easy to blow in the range of this, and will not be because of tungsten filament
Surface curvature radius is big and transmitting is become difficult, and tungsten filament is installed in high-temperature insulation set, provides temperature not less than 800 DEG C.
By adjusting low-tension supply (14) output voltage, tungsten filament heating power, control high-temperature insulation set surface temperature are adjusted.
In general, by the contemplated above technical scheme of the present invention compared with prior art, it can obtain down and show
Beneficial effect：
1st, for the present invention by the way of heating hot cathode produces electronics, working voltage is low, simple in structure, is not required to
High voltage power supply and protection equipment that will be complicated, and device flexibility ratio is high.
2nd, ozone free and X-ray pollution.Compared to conventional electron generating, the heating thermoelectron hair that the present invention uses
Penetrate cathode and produce the mode of electronics when working, obstructed too high voltages breakdown air just can outwardly launch single electronics, therefore
Ozone free and X-ray pollution.
3rd, the present invention produces bombardment electronics by heating metal assembly in metal assembly, by bombardment electronic action and absolutely
Edge is put on, and heats insulation sleeve, using the teaching of the invention it is possible to provide the heat of higher, and heated evenly by the way of electron bombardment, tungsten filament makes
Use longer life expectancy.
4th, electrode provided by the invention is in hemispherical and is bonded with insulation sleeve, heat can be preferably absorbed from insulation sleeve,
Be conducive to produce electronics.
5th, electron emission voltage can be reduced as thermionic emission anode using silicon nitride film.Silicon nitride film machine
Tool intensity is high, electronics ejection efficiency is much better than the conventional of titanium and aluminium oxide etc and draws material, therefore can easily be formed low
The electronics of the big density of energy.
6th, electron density is high.Rare-Earth Tungsten thermionic emission materials have good electron emission characteristic, zero-field emission electronics
Density is higher, using such a material as cathode, can produce highdensity electricity under relatively low voltage and a certain operating temperature
Son.
7th, device uses hemispheric structure.The hemispheric structure of high degree of symmetry makes electron emission evenly be conducive to
Device uniformly bears load, increases structural strength, and can reduce processing technology difficulty, reduces processing cost.
Brief description of the drawings
Fig. 1 is the structure diagram of the electron generating provided by the invention based on hot cathode；
Fig. 2 is the bottom view of the electron generating main body provided by the invention based on hot cathode.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below
Not forming conflict each other can be mutually combined.
The present invention proposes a kind of electron generating based on hot cathode, for producing high density electron stream,
Overcome it is existing in the prior art it is complicated, efficiency is low, the problem of being polluted there are ozonation by-product and X-ray.
Fig. 1 is the structure diagram of the electron generating provided by the invention based on hot cathode, and Fig. 2 is this
The bottom view of the electron generating main body based on hot cathode provided is provided.The electron generating includes heating
Unit and electronics generating unit, heating unit are used to produce heat electronics generating unit, and electronics generating unit is used to pass through
Heating is generated and transmitted by electronics.
Heating unit includes heating component, insulation sleeve 11, wire connection terminal 12, insulating component 13,14 and of low-tension supply
Metab 15.Heating component includes multiple heating wires, and heating wire can be incense coil shape tungsten filament 10.Wherein, insulate
Set 11 and metab 15 are in hemispherical, and insulation sleeve is made by quartz ampoule or alundum tube, can bear high temperature, metab
It can bear high temperature.In embodiment provided by the invention, high-temperature insulation covers 11 radiuses for the ㎝ of 25 ㎝~35, the ㎝ of 1 ㎝ of set thickness~2.
Insulation sleeve 11 is nested with metab 15 to be placed, and is set between high-temperature insulation set 11 and refractory metal base 15
Gap, insulating assembly 13 and the openend of high-temperature insulation set 11 and the opening end in contact of refractory metal base 15 are equipped with, is used for
Gap is provided between sealing high-temperature insulation set 11 and refractory metal base 15, forms heating gap.Refractory metal base
15 tops offer a hole, 6 circular holes are angularly opened up on hemisphere face, incense coil shape tungsten filament is in heating gap, and its one end
An output terminal of heating component is formed through refractory metal base 15 via a hole, its other end is fixed on high temperature resistant gold
Belong on base 15, refractory metal base 15 is used to form heating gap, fixes incense coil shape tungsten filament and forms heater circuit
A part.
Two output terminals of low-tension supply 14 are connected with two wire connection terminals 12 on insulating assembly 13 respectively, resistance to height
The openend of warm metab 15 is connected by the first conducting wire being arranged in insulating assembly 13 with wire connection terminal, heating component
All output terminals are connected with the second conducting wire being arranged in insulating assembly 13, and by the second conducting wire with another wire connection terminal
Connection.
By adjusting 14 output voltage of power supply, 10 heating power of incense coil shape tungsten filament can be changed, control high-temperature insulation covers 11 tables
Face temperature.
Electronics generating unit includes hot cathode 20, silicon nitride film 21, high-voltage connection terminal 22, ground terminal
23rd, support base 24 and high voltage power supply 25；Wherein, hot cathode 20 is in hemispherical that hot cathode 20 uses
Rare earth oxide, Rare-Earth Tungsten and rare earth-Mo are made, and the mass percent of rare earth oxide is 2.2%, rare-earth oxidation
Thing can be La2O3Or Y2O3Or Ce2O3.26 ㎝ of hemisphere internal diameter~40cm of hot cathode, 1~5mm of thickness.Silicon nitride
Film 21 be used as thermionic emission anode, its thickness be 300nm, by single chip be 0.7mm × 0.7mm or 0.7mm ×
The silicon nitride film of 40mm is paved with just a hemisphere surface in an array manner.
Hot cathode 20 is hemispherical configuration, attaches and is installed on 11 outer surfaces of high-temperature insulation set, to receive its hair
The heat gone out；Silicon nitride film 21 is the hemispherical configuration of integral ground, is located at outside hot cathode 20；Silicon nitride film
21 are fixed on insulating component 13；20 open at one end of hot cathode is fixed on insulating component 13；Thermoelectricity
Sub- emitting cathode 20 covers 11 homocentric settings with high-temperature insulation, for launching electronics；Hot cathode 20, silicon nitride film 21 with
And insulating component 13 forms emission space.
25 5~20kW of rated operating power of high voltage power supply, output voltage is continuously adjustable for 0~20kV, exports as direct current.
25 output voltage of high voltage power supply adjusts, and for changing 20 operating voltage of electron emitting cathode, density occurs for control electronics.
During work, bombardment electronics, the very big high-temperature insulation of the bombardment heating coefficient of heat conduction are produced by incense coil shape tungsten filament 10
Set 11, is bonded, it can be evenly heated electron emitting cathode 20, make electron emission by covering high-temperature insulation with electron emitting cathode
The launching electronics under high pressure effect of cathode 20, and the electric field acceleration formed between electron emitting cathode 20 and silicon nitride film 21
Under effect, penetrate silicon nitride film 21 and go out, incide in surrounding environment, form electron emission.
Incense coil shape tungsten filament line footpath is in 0.5mm~5mm.Tungsten filament is not easy to blow in the range of this, and will not be because of tungsten filament
Radius of curvature is big and transmitting is become difficult, and tungsten filament is installed in high-temperature insulation set, provides temperature not less than 800 DEG C.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all any modification, equivalent and improvement made within the spirit and principles of the invention etc., should all include
Within protection scope of the present invention.
Claims (8)
1. a kind of electron generating based on hot cathode, it is characterised in that occur including heating unit and electronics
Unit, heating unit are used to produce heat electronics generating unit, and electronics generating unit is used to be generated and transmitted by by heating
Electronics；
Heating unit includes metab (15), insulation sleeve (11), heating component and insulating component (13), heating component
Including multiple heating wires (10), and multiple through holes are provided with metab, wherein, metab (15) and insulation sleeve
(11) nested arrangement from inside to outside, is equipped with gap between metab (15) and insulation sleeve (11), heating wire is located at gap
Interior, heating wire one end is connected with metab, and the other end forms an output terminal of heating component through through hole；
The contact of the openend of insulating component (13) same to metab (15) and the openend of insulation sleeve (11), for sealing
Gap between metab (15) and insulation sleeve (11), forms heating space；
The first conducting wire and the second conducting wire are equipped with insulating component (13), first conducting wire one end is connected with metab, another
The first power end as heating unit is held, one end of the second conducting wire is connected with all output terminals of heating component, and the other end is made
For the second source end of heating unit；
Heating component produces bombardment electronics after powered up, and insulation sleeve generates heat under the action of electronics is bombarded.
2. electron generating as claimed in claim 1, it is characterised in that electron emission unit includes：Thermionic emission is cloudy
Pole and thermionic emission anode, wherein, hot cathode and thermionic emission anode nested arrangement from inside to outside, thermoelectron
Gap is equipped between emitting cathode and thermionic emission anode, hot cathode is attached to the outer surface of insulation sleeve, insulation
Insulating assembly (13) with hot cathode openend contact with the openend of thermionic emission anode, for sealing heat
Gap between electron emitting cathode and thermionic emission anode, forms emission space；
Privates is equipped with insulating component (13), one end of privates is connected with hot cathode, the other end
As the first power end of electron emission unit, second source end of the thermionic emission anode as electron emission unit；
The heat that hot cathode is used to receive insulation sleeve produces electronics, and electronics is sent out in hot cathode and thermoelectron
Under the action of the electric field acceleration formed between shining sun pole, penetrating electrons transmitting anode film, forms transmitting.
3. electron generating as claimed in claim 2, it is characterised in that thermionic emission anode is silicon nitride film.
4. electron generating as claimed in claim 2 or claim 3, it is characterised in that by varying thermionic emission anode and heat
Voltage between electron emitting cathode realizes control electron density.
5. such as Claims 1-4 any one of them electron generating, it is characterised in that metab is provided with one and is located at
The through hole on top and multiple through holes being centrosymmetric.
6. such as claim 2 to 5 any one of them electron generating, it is characterised in that metab, insulation sleeve and heat
Electron emitting cathode is spherical in semicircle.
7. such as claim 1 to 6 any one of them electron generating, it is characterised in that the heating wire is incense coil
The tungsten filament of shape.
8. electron generating as claimed in claim 7, it is characterised in that the incense coil shape tungsten filament line footpath 0.5mm~
5mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711340737.8A CN107910236B (en) | 2017-12-14 | 2017-12-14 | Electron emission device based on thermionic emission cathode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711340737.8A CN107910236B (en) | 2017-12-14 | 2017-12-14 | Electron emission device based on thermionic emission cathode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107910236A true CN107910236A (en) | 2018-04-13 |
| CN107910236B CN107910236B (en) | 2023-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711340737.8A Active CN107910236B (en) | 2017-12-14 | 2017-12-14 | Electron emission device based on thermionic emission cathode |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110995060A (en) * | 2019-12-14 | 2020-04-10 | 杭州电子科技大学 | Method and device for multiplexing thermal power generation and thermal energy storage based on electron emission |
| CN113838724A (en) * | 2021-09-18 | 2021-12-24 | 山东大学 | Hot cathode assembly, vacuum virtual cathode automatic measuring device and method |
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| WO2010030899A1 (en) * | 2008-09-12 | 2010-03-18 | Vu1 Corporation | System and apparatus for cathodoluminescent lighting |
| CN103903941A (en) * | 2012-12-31 | 2014-07-02 | 同方威视技术股份有限公司 | Cathode-control multi-cathode distributed X-ray device and CT equipment with same |
| CN107182165A (en) * | 2017-06-20 | 2017-09-19 | 华中科技大学 | A kind of plasma emission device based on hot cathode |
| CN207676874U (en) * | 2017-12-14 | 2018-07-31 | 华中科技大学 | A kind of electron emitting device based on hot cathode |
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2017
- 2017-12-14 CN CN201711340737.8A patent/CN107910236B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010030899A1 (en) * | 2008-09-12 | 2010-03-18 | Vu1 Corporation | System and apparatus for cathodoluminescent lighting |
| CN103903941A (en) * | 2012-12-31 | 2014-07-02 | 同方威视技术股份有限公司 | Cathode-control multi-cathode distributed X-ray device and CT equipment with same |
| CN107182165A (en) * | 2017-06-20 | 2017-09-19 | 华中科技大学 | A kind of plasma emission device based on hot cathode |
| CN207676874U (en) * | 2017-12-14 | 2018-07-31 | 华中科技大学 | A kind of electron emitting device based on hot cathode |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110995060A (en) * | 2019-12-14 | 2020-04-10 | 杭州电子科技大学 | Method and device for multiplexing thermal power generation and thermal energy storage based on electron emission |
| CN113838724A (en) * | 2021-09-18 | 2021-12-24 | 山东大学 | Hot cathode assembly, vacuum virtual cathode automatic measuring device and method |
| CN113838724B (en) * | 2021-09-18 | 2022-06-21 | 山东大学 | Hot cathode assembly, vacuum virtual cathode automatic measuring device and method |
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| Publication number | Publication date |
|---|---|
| CN107910236B (en) | 2023-07-04 |
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