CN103474312B - A kind of travelling-wave tube supporting rod and preparation method thereof - Google Patents
A kind of travelling-wave tube supporting rod and preparation method thereof Download PDFInfo
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- CN103474312B CN103474312B CN201310408224.1A CN201310408224A CN103474312B CN 103474312 B CN103474312 B CN 103474312B CN 201310408224 A CN201310408224 A CN 201310408224A CN 103474312 B CN103474312 B CN 103474312B
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- supporting rod
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- metal inside
- pottery
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Abstract
The invention discloses a kind of travelling-wave tube supporting rod and preparation method thereof, including metal inside and the ceramic material layer being positioned at outside metal inside, the linear expansion coefficient of described metal inside is same or like with the linear expansion coefficient of described ceramic material, layer of metal layer or alloy-layer such as nickel, copper, yellow gold, gold copper it is respectively equipped with, the one in a kind of and reactive metal layer such as titanium, zirconium, tantalum, niobium in germanium copper alloy etc. on the outer surface of described metal inside.The ceramic supporting rod of a kind of band metal inside provided by the present invention, compared with conventional ceramic supporting rod, has more preferable intensity and pliability, when thus be accordingly used in the assembling of slow-wave structure, it is not easy to fracture.
Description
Technical field
The invention belongs to microwave vacuum electronic technology field, be specifically related to supporting with the slow wave circuit in travelling-wave tube
The ceramic supporting rod used.
Background technology
Travelling-wave tube is an of paramount importance class microwave, Millimeter-Wave Source in vacuum electronics field, have high-power,
High efficiency, high-gain, wide band feature, be widely used in microwave and millimeter wave radar, electronic countermeasure, system
Lead, communicate, microwave remote sensing, the field such as microblogging measurement.Slow wave circuit is as carrying out in travelling-wave tube noting-ripple interaction
In order to encourage the circuit amplifying microwave and millimeter wave energy, being the core of travelling-wave tube, its performance directly decides row
The technical merit of wave duct.
In the slow wave circuit of travelling-wave tube, such as helix line slow-wave system, bifilar helical line slow wave system and
Ring-bar slow wave systems etc., employ pottery supporting rod in a large number, and its shape is as shown in Fig. 1 to Fig. 3.These potteries
Supporting rod, except playing dielectric insulation, also improves the effect of slow wave circuit dispersion characteristics.Due to pottery supporting rod
The most fragile, slow-wave structure is easy to rupture because of discontinuity assembling when, causes
The waste of lot of materials.If using niberlox, the beryllium oxide powder produced when there is fracture
End is highly toxic material, it is easy to cause environmental pollution.It addition, travelling-wave tube is at high temperature, the environment of high vibration
During lower work, pottery supporting rod is likely to fragment into a few part, so that the hydraulic performance decline of travelling-wave tube, longevity
Life reduces.Therefore, it is highly desirable to find and a kind of both there is high mechanical strength, there is again certain pliability
The ceramic supporting rod of energy.
Summary of the invention
The present invention proposes a kind of travelling-wave tube pottery supporting rod and preparation method thereof, and this pottery supporting rod not only has
Higher mechanical strength, and the most certain flexility, overcome pottery supporting rod dress in background technology
The shortcoming of timing easy fracture.
The present invention is the most by the following technical solutions:
The invention provides a kind of travelling-wave tube supporting rod and preparation method thereof, it is characterised in that include following
Step:
First the outer surface at metal inside plates layer of metal or alloy-layer, such as nickel, copper, Ag-Cu alloy, gold
-copper alloy, the one in germanium-copper alloy etc., the outer surface at metal or alloy layer plates one layer of activity the most again
One in metal such as titanium, zirconium, tantalum, niobium.The metal or alloy layer of ground floor is easy to less than activity gold
Belonging to and form liquid phase alloy with active metal at a temperature of fusing point, the titanium being the most under liquid phase state is easy to
React with ceramic surface, such that it is able to complete the sealing-in of metal and pottery.
Outer surface is coated with the inside that the metal inside of metal level is fixed on the mould of press ceramic supporting rod；
In the mould of press ceramic supporting rod, fill up ceramic material, and start the compacting of pottery supporting rod, compacting
Pressure is at about 20-30MPa, and the press time is 15-25 minute；
The ceramic supporting rod suppressed is placed in the high temperature of 1500 DEG C-1700 DEG C sintering 2-4 hour, is made pottery
Porcelain supporting rod finished product.
In technique scheme, the linear expansion coefficient of described metal inside expands system with the line of described ceramic material
Number is same or like.
In technique scheme, the material of described metal inside is low bulk metal, such as ferrum nickel cobalt magnetic sealing gold
4J33 or 4J34.
In technique scheme, described ceramic material is in beryllium oxide ceramics, boron nitride ceramics, aluminium oxide ceramics
One.
In technique scheme, described pottery supporting rod shape of cross section be rectangle, circle, sector, trapezoidal,
One in isosceles triangle；The shape of cross section of described metal inside is identical with pottery supporting rod shape of cross section
Rectangle, circle, sector, one in trapezoidal, isosceles triangle.
Present invention also offers a kind of travelling-wave tube pottery supporting rod, it is characterised in that: include metal inside and be positioned at
Ceramic material layer outside metal inside, the linear expansion coefficient of described metal inside is swollen with the line of described ceramic material
Swollen coefficient is same or like, and the outer surface of described metal inside is provided with at least one of which reactive metal layer.
In the technical scheme of above-mentioned a kind of travelling-wave tube pottery supporting rod, the material of described metal inside is low bulk gold
Belong to, such as ferrum nickel cobalt magnetic sealing gold 4J33 or 4J34.
In the technical scheme of above-mentioned a kind of travelling-wave tube pottery supporting rod, described ceramic material is beryllium oxide ceramics, nitrogen
Change the one in boron pottery, aluminium oxide ceramics.
In the technical scheme of above-mentioned a kind of travelling-wave tube pottery supporting rod, the shape of cross section of described pottery supporting rod is
One in rectangle, circle, sector, trapezoidal, isosceles triangle；The shape of cross section of described metal inside be with
One in the pottery identical rectangle of supporting rod shape of cross section, circle, sector, trapezoidal, isosceles triangle.
Beneficial effects of the present invention is as follows:
(1) the ceramic supporting rod of a kind of band metal inside provided by the present invention and conventional ceramic supporting rod phase
Ratio, has more preferable intensity and pliability, when thus be accordingly used in the assembling of slow-wave structure, it is not easy to fracture.
(2) to not only act as medium in slow-wave structure exhausted for the ceramic supporting rod of a kind of band metal inside of the present invention
The effect of edge, also acts as the effect of vane loaded, therefore can improve the dispersion characteristics of slow-wave structure, increases row
The bandwidth of wave duct.Further, since the cross sectional dimensions of millimeter wave slow-wave structure is the least, the most undersized slowly
Wave structure is processed fin extremely difficult, it is difficult to ensureing the precision of processing, therefore the present invention improves slow wave knot
The machining accuracy of structure, also reduces manufacturing cost simultaneously.
Accompanying drawing explanation
Fig. 1 is traditional rectangular ceramic supporting rod；
Fig. 2 is traditional round ceramic supporting rod；
Bar held by the fan-shaped pottery that Fig. 3 is traditional；
Fig. 4 is the rectangular ceramic supporting rod of a kind of band rectangular metal inner core of the present invention；
Fig. 5 is the round ceramic supporting rod of a kind of band circular metal inner core of the present invention；
Fig. 6 is a kind of fan-shaped pottery supporting rod with trapezoidal metal inside of the present invention.
In figure, 1 is ceramic material layer, and 2 is metal inside.
Detailed description of the invention
The present invention is further described with embodiment below in conjunction with the accompanying drawings, but embodiments of the present invention are not limited to
This.In order to understand the present invention comprehensively, refer to numerous detail in the following detailed description.But ability
Field technique personnel are it should be understood that the present invention can realize without these details.In other example,
It is not described in detail known method, process, assembly and circuit, in order to avoid unnecessarily making embodiment obscure.
According to an aspect of the present invention, disclose the preparation method of a kind of travelling-wave tube pottery supporting rod, including
Following steps:
Select metal inside and ceramic material, the linear expansion coefficient of described metal inside and described ceramic material
Linear expansion coefficient is same or like；
First the outer surface at metal inside plates layer of metal or alloy-layer, such as nickel, copper, Ag-Cu alloy, gold
-copper alloy, the one in germanium-copper alloy etc., the outer surface at metal or alloy layer plates one layer of activity the most again
One in metal such as titanium, zirconium, tantalum, niobium.
Outer surface is coated with the inside that the metal inside of metal level is fixed on the mould of press ceramic supporting rod；
In the mould of press ceramic supporting rod, fill up ceramic material, and start the compacting of pottery supporting rod, pressure
Pressing pressure is at 20-30MPa, and the press time is 15-25 minute；
The ceramic supporting rod suppressed is placed in the high temperature of 1500 DEG C-1700 DEG C sintering 2-4 hour, obtains
Pottery supporting rod finished product.
According to a further aspect in the invention, a kind of travelling-wave tube pottery supporting rod is also disclosed, including metal inside 2
With the ceramic material layer 1 being positioned at outside metal inside, the linear expansion coefficient of its metal inside 2 and ceramic material layer 1
The linear expansion coefficient of ceramic material same or like, the outer surface of described metal inside is provided with at least one
Layer reactive metal layer.Wherein, during ceramic material is beryllium oxide ceramics, boron nitride ceramics, aluminium oxide ceramics
One, pottery supporting rod shape of cross section be rectangle as shown in Figures 4 to 6, circle, sector or
One in trapezoidal, isosceles triangle, or other shape, the shape of cross section of metal inside is such as Fig. 4 to Fig. 6
In the shown rectangle identical with pottery supporting rod shape of cross section, circle, fan-shaped or trapezoidal, isosceles triangle
One, or other shape.
Embodiment one
Present embodiment with pottery supporting rod and the cross section of metal inside all as rectangular configuration, and metal inside
As a example by being positioned at the central authorities of pottery supporting rod, wherein the material of pottery supporting rod is beryllium oxide, the material of metal inside
Material is ferrum nickel cobalt magnetic sealing gold 4J34.Long limit × minor face × a length of 4 × 5 × 130mm of rectangular channel；Rectangle
Long limit × minor face × a length of 4 × 5 × 130mm of pottery supporting rod；The long limit of rectangular metal inner core cross section ×
Minor face × a length of 2 × 2.5 × 130mm.Plate respectively on the surface of metal inside one layer of 10 μ m-thick nickel dam and
Titanium layer, is then fixed on bonding jumper the central authorities of groove, and fills beryllium oxide ceramics powder in groove, through pressure
It is sintered by normal beryllium oxide ceramics sintering specification after machine compacting, just defines set by the present invention after sintering
A kind of ceramic supporting rod of the band metal inside of the travelling-wave tube of meter.
In the present embodiment, the linear expansion coefficient of beryllium oxide ceramics is about 7.5 × 10 in the range of 20-400 DEG C-6/
DEG C, Young's modulus is 3 × 1011N/m^2, Poisson's ratio is 0.3, and rupture strength is 137N/mm^2；Ferrum nickel cobalt
The linear expansion coefficient of magnetic sealing gold 4J34 is about 6.29 × 10 in the range of 20-400 DEG C-6/ DEG C, Young's modulus
It is 1.568 × 1011N/m^2, Poisson's ratio is 0.3, and rupture strength is 539N/mm^2.Understanding, beryllium oxide is made pottery
The approximation of the linear expansion coefficient of ceramic material 4J34 golden with the sealing of ferrum nickel cobalt magnetic, but ferrum nickel cobalt magnetic sealing gold 4J34
Rupture strength is niberlox 3.93 times, the therefore band metal of a kind of travelling-wave tube of the present invention
The ceramic supporting rod of inner core compared with conventional oxidation beryllium supporting rod, has bigger rupture strength, therefore with ratio
Fracture it is not easy when the assembling of slow-wave structure.
Embodiment two
Present embodiment with pottery supporting rod and the cross section of metal inside all as circular configuration, and metal inside
As a example by being positioned at the central authorities of pottery supporting rod, wherein the material of pottery supporting rod is aluminium oxide, the material of metal inside
Material is ferrum nickel cobalt magnetic sealing gold 4J33.The radius of circular trough × a length of 4 × 100mm；Round ceramic supporting rod
Radius × a length of 4 × 100mm；The radius of circular metal inner core cross section × a length of 2 × 100mm.?
Layers of copper and the titanium layer of one layer of 10 μ m-thick is plated on the surface of metal inside respectively, then bonding jumper is fixed on groove
Central authorities, and in groove, fill alumina ceramic powder, burn by normal aluminium oxide ceramics after forcing press is compacted
Knot specification is sintered, and just defines the band metal inside of a kind of travelling-wave tube designed by the present invention after sintering
Ceramic supporting rod.
In the present embodiment, the linear expansion coefficient of aluminium oxide ceramics is about 7.01 × 10 in the range of 20-400 DEG C-6/
DEG C, Young's modulus is 3.6 × 1011N/m^2, Poisson's ratio is 0.3, and rupture strength is 323N/mm^2；Ferrum nickel
The linear expansion coefficient of cobalt magnetic sealing gold 4J33 is about 6.06 × 10 in the range of 20-400 DEG C-6/ DEG C, Young mould
Amount is 1.764 × 1011N/m^2, Poisson's ratio is 0.3, and rupture strength is 539N/mm^2.Understand, aluminium oxide
The approximation of the linear expansion coefficient of ceramic material 4J33 golden with the sealing of ferrum nickel cobalt magnetic, but ferrum nickel cobalt magnetic sealing gold
The rupture strength of 4J33 is 1.67 times of niberlox, therefore the band of a kind of travelling-wave tube of the present invention
The ceramic supporting rod of metal inside compared with conventional aluminium oxide supporting rod, has bigger rupture strength with ratio,
Therefore fracture it is not easy when the assembling of slow-wave structure.
" embodiment ", " another embodiment ", " embodiment " spoken of in this manual etc.,
Refer to combine specific features, structure or the feature that this embodiment describes, be included in the application generality and retouch
In at least one embodiment stated.The most multiple local appearance statement of the same race is not necessarily to refer to together
One embodiment.Furthermore, it is understood that combine any embodiment to describe a specific features, structure or feature
Time, to be advocated is combines other embodiments to realize also the falling at this of this feature, structure or feature
In the range of invention.
Although reference be made herein to invention has been described for the multiple explanatory embodiment of the present invention, but, should
This is interpreted as that those skilled in the art can be designed that a lot of other amendments and embodiment, these amendment and
Embodiment will fall within spirit disclosed in the present application and spirit.In particular, public in the application
In the range of the specification, drawings and the claims opened, can to the building block of theme composite configuration and/or
Layout carries out multiple modification and improvement.In addition to the modification that building block and/or layout are carried out and improvement, right
For those skilled in the art, other purposes also will be apparent from.
Claims (2)
1. a travelling-wave tube pottery supporting rod, it is characterized in that: include that metal inside, metal inside side are completely covered with ceramic material layer, the linear expansion coefficient of described metal inside is same or like with the linear expansion coefficient of described ceramic material, and the outer surface of described metal inside is provided with at least one of which reactive metal layer；The material of described metal inside is low bulk metal, and low bulk metal is fe-Ni-Co ceramic sealing alloy 4J33 or 4J34；Described ceramic material is the one in beryllium oxide ceramics, boron nitride ceramics, aluminium oxide ceramics；The shape of cross section of described pottery supporting rod is the one in rectangle, circle, sector, trapezoidal, isosceles triangle；The shape of cross section of described metal inside is and the one in the pottery identical rectangle of supporting rod shape of cross section, circle, sector, trapezoidal, isosceles triangle.
2. the preparation method of a travelling-wave tube pottery supporting rod, it is characterised in that comprise the following steps:
First the outer surface at metal inside plates layer of metal or alloy-layer, and the layer of metal of described outer surface plating is nickel, copper, and described alloy-layer is any one in Ag-Cu alloy, gold-copper alloy or germanium-copper alloy,
Outer surface at metal or alloy layer plates one layer of active metal the most again, and active metal is any one in titanium, zirconium, tantalum or niobium；
Outer surface is coated with the inside that the metal inside of reactive metal layer is fixed on the mould of press ceramic supporting rod；
Filling up ceramic material in the mould of press ceramic supporting rod, and start the compacting of pottery supporting rod, pressing pressure is at 20-30MPa, and the press time is 15-25 minute；
The ceramic supporting rod suppressed is placed in the high temperature of 1500 DEG C-1700 DEG C sintering 2-4 hour, obtains pottery supporting rod finished product,
The linear expansion coefficient of described metal inside is same or like with the linear expansion coefficient of described ceramic material；The material of described metal inside is low bulk metal, and low bulk metal is fe-Ni-Co ceramic sealing alloy 4J33 or 4J34；Described ceramic material is the one in beryllium oxide ceramics, boron nitride ceramics, aluminium oxide ceramics；The shape of cross section of described pottery supporting rod is the one in rectangle, circle, sector, trapezoidal, isosceles triangle；The shape of cross section of described metal inside is and the one in the pottery identical rectangle of supporting rod shape of cross section, circle, sector, trapezoidal, isosceles triangle.
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| CN201310408224.1A CN103474312B (en) | 2013-09-09 | 2013-09-09 | A kind of travelling-wave tube supporting rod and preparation method thereof |
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| CN114538933B (en) * | 2020-11-24 | 2022-11-22 | 娄底市安地亚斯电子陶瓷有限公司 | Method for manufacturing travelling wave tube clamping rod |
| CN114864360B (en) * | 2022-05-17 | 2023-06-09 | 电子科技大学 | Ultra-wideband helix traveling wave tube and helix slow wave structure thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000215819A (en) * | 1999-01-22 | 2000-08-04 | Nec Corp | Traveling wave tube |
| JP2006134751A (en) * | 2004-11-08 | 2006-05-25 | Nec Microwave Inc | Electron tube |
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| US4264842A (en) * | 1977-10-28 | 1981-04-28 | Elettronica S.P.A. | Helix type traveling-wave tubes with auxiliary selective shielding provided by conductive elements applied upon dielectric supports |
| CN1088898A (en) * | 1992-12-28 | 1994-07-06 | 有限会社亚道陶瓷研究所 | Ceramic sintered products with metallic bones |
| EP0702388A1 (en) * | 1994-08-17 | 1996-03-20 | Kabushiki Kaisha Toshiba | Slow-wave circuit assembly for traveling-wave tube and method of manufacturing a slow-wave circuit assembly |
| CN1281235A (en) * | 1999-07-12 | 2001-01-24 | 三菱电机株式会社 | Insulated operating rod and its manufacturing method |
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