CN109020536A - A kind of media ceramic resonance manufacturing method - Google Patents
A kind of media ceramic resonance manufacturing method Download PDFInfo
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- CN109020536A CN109020536A CN201811145239.2A CN201811145239A CN109020536A CN 109020536 A CN109020536 A CN 109020536A CN 201811145239 A CN201811145239 A CN 201811145239A CN 109020536 A CN109020536 A CN 109020536A
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
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- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
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Abstract
The invention discloses a kind of media ceramic resonance manufacturing methods, comprising the following steps: ionized water and zirconia balls progress ball milling is added in the first step after mixing calcium carbonate, aluminium oxide, neodymia, titanium dioxide, the first powder is made；The second powder is made after barium carbonate, aluminum oxide, tantalum pentoxide, zinc oxide, strontium carbonate, silica being added after the first powder calcination in second step；Third step, the second powder calcination, calcined second powder is put into polyesteramine bucket, deionized water and zirconia balls are added, polyvinyl alcohol water solution is added and is used as binder, after addition dispersing agent and release agent ball milling twenty four hours, is granulated；4th step, hydrostatic profile are pressed into granulation powder the small cylinder with holes of radius 13.85mm, thickness 6.2mm；5th step is made annealing treatment again after small cylinder is sintered, and is carrying out analysis measurement to the ripe green body after annealing；Qualified product is put in storage by the 6th step.
Description
Technical field
The invention belongs to the quasi- hydrostatic profile technical fields of ceramics, and in particular to a kind of media ceramic resonance manufacturing method.
Background technique
Dielectric resonator is an important component of 5G communication base station, has important shadow with reception to base station signal transmitting
It rings, with the announcement of China's 5G standard, the deployment of new round wireless communication infrastructure i.e. will be fully under way, wherein base station deployment
It will be important one of project, current GSM and cdma base station will face comprehensive upgrading.Realize that the movement of high quality is logical
News, it is very crucial that control interference signal enters communication channel, on the one hand, to control the interference outside communication channel to communication channel
It influences, the influence of thunderous electrical interference, the influence (such as influence of the gsm communication signal to CDMA) of other communication systems.Another party
Face, control between same communication system channel interfere with each other it is also very crucial.For this purpose, the radio frequency part in mobile communication base station
Above-mentioned function need to be realized with filter and duplexer.At present the filter and duplexer of Base Transmitter part with harmonic oscillator mostly
Using silver plated metals coaxial cavity, due to the limited (Q of Q value of this coaxial cavityuAbout thousands of), and resonance frequency temperature stability
Very poor (being determined by the intrinsic larger thermal expansion coefficient of wire chamber), in order to generate its frequency with the variation of environment temperature
Biggish drift, entire base station must work in isoperibol, cause the bulky of base station.Due to dielectric resonator size with
The radical sign of the dielectric constant of used medium material is inversely proportional, therefore the dielectric resonator made of high dielectric constant material can
So that resonator minimizes, in addition the temperature coefficient of resonance frequency of dielectric resonator can accomplish nearly zero, and adjustable.Entire base
Standing need not work in isoperibol, so that the volume of entire base station be made substantially to minimize.Therefore high performance microwave dielectric resonator
Application be mobile communication base station miniaturization and high stability a kind of inevitable choice.
Isostatic pressing method, which is widely used in, at present produces ceramics, graphite and metal-powder product, abrasive product, is also used to produce resistance to
Fiery product.When equal static pressure, can be used different extrusion mediums: liquid, inert gas, elastomer and molten metal, glass,
Graphite (hot isostatic pressing) etc..
In practice, what prevalence was most wide is hydrostatic, it is using liquid as the medium of transmitting pressure.This method can be with
The high-intensitive product that shape and size cannot be shaped with other methods is produced by plasticity, inductile and nonplastic powder.It is practical
Upper is exactly that can suppress any high density and the extremely uniform product of density.
Although hydrostatic can be with wide, superiority is big, it still has some shortcomings, that is, is difficult to widely apply
In the large-scale production of enterprise.Such as: in order to realize this method, need equipment set: high-intensitive steel hydraulic device,
Hydraulic pump, vacuum pump, extruding liquid container, complicated pressure piping system, various measuring instruments tool etc..Everything must all occupy compared with
Big production site and considerable basic charge.Since isobaric installation weight is big, pipeline possesses sealed connection, it is very difficult to or even at certain
It cannot implement vibration to the moudling powder for the pressure devices such as being packed into a little situations.Given this, usually vibrated outside atmospheric unit, this
It is greatly lowered the production efficiency of technique.In addition, especially using thin the case where dissipating moudling powder when suppressing big part product
Under, since powder volatilizees in vacuum, it is very difficult to be vacuum-treated to it.Additional installing collector, cannot ensure vacuum processing sometimes
The reliability of technique.There are also the products that equal pressure devices can only shape a kind of specification substantially, or the product of adjoining dimensions.
Summary of the invention
Present invention aim to address the above problems, provide a kind of obtained product of media ceramic resonance manufacturing method
Compared with existing microwave dielectric material, have the advantages that high q-factor, medium dielectric constant microwave medium, production Repeatability is good, and its temperature
Coefficient T f is adjustable, thus make it possible high-power, high stability, good matrix coefficient filter and duplexer.
In order to solve the above technical problems, the technical scheme is that a kind of media ceramic resonance manufacturing method, including
Following steps:
S1, the first powder of production, by calcium carbonate, aluminium oxide, neodymia, titanium dioxide is mixed to form the first microwave material,
Deionized water is added in the first microwave material and zirconia balls carry out ball milling, is dried after ball milling, then passes through steel wire
Mesh screen obtains the first powder；
Carbon is added in the first powder after firing in S2, the second powder of production, the first powder calcination that step S1 is obtained
Sour barium, aluminum oxide, tantalum pentoxide, zinc oxide, strontium carbonate, silica form the second microwave material, described second
Deionized water is added in microwave material and zirconia balls carry out ball milling, dries after ball milling, is then obtained by steel wire mesh screen
To the second powder；
Calcined second powder is put into polyesteramine bucket by the second powder calcination by S3, granulation, be added deionized water with
Zirconia balls are added polyvinyl alcohol water solution as binder and are granulated after dispersing agent and release agent ball milling is added；
Granulation powder is pressed into small cylinder with holes by S4, hydrostatic profile；
The small cylinder suppressed is first carried out binder removal by S5, sintering, then product is obtained by sintering, after sintering
Raw material made annealing treatment, analysis measurement then is carried out to material；The data of analysis measurement include: preburning powdered material and sintering sample
The crystal phases of product forms and morphology, the relative dielectric constant and dielectric loss of material, the frequency-temperature coefficient of material and
Microwave dielectric property simultaneously carries out high/low-temperature impact test；
S6, step S5 qualification product be put in storage.
Preferably, the time dried in the step S1 is 48 hours, carries out briquetting after drying again；Production after briquetting
Product be placed on 1150 DEG C to 1200 DEG C at a temperature of pre-burning two hours, by the porcelain formed after pre-burning crush, add mass fraction
For 3 percent polyvinyl alcohol resin, then it is granulated to obtain the first powder.
Preferably, the step S4 is further comprising the steps of:
S41, raw material to be pressed is put into quasi-iso static pressing molding die, the top of quasi-iso static pressing molding die and static pressure machine
It is connected；
S42, powder to be compressed is inserted in quasi-iso static pressing molding die；
S43, after inserting powder to be compressed into quasi-iso static pressing molding die to step S22, static pressure machine work when compress
Powder to be compressed in quasi-iso static pressing molding die, compression powder form in by compression process；
S44, in step S23 powder compression molding after, static pressure machine reverse operation, take out be located at quasi-iso static pressing form
Powder in mold after compression forming.
Preferably, the quasi-iso static pressing molding die in the step S41 includes: molding die main body, floating die, ejection
Device, pressure buffer, the formpiston that can be moved up and down, vibrator and spring part, backing-out punch are located at the inside of molding die main body, at
Pattern tool body interior is filled out equipped with moudling powder rushes chamber, and moudling powder filled cavity is located at the top of backing-out punch；The top of backing-out punch and pressure
Power buffer is connected, and formpiston is located at the top of pressure buffer；Pressure buffer is cylindrical structure, and floating die is located at compression moulding
The outside of powder filled cavity, floating die are connected with vibrator, and floating die is connected by spring part with molding die main body, float
Former can be moved synchronously when the downward compressed-bit of formpiston is in powder to be compressed on pressure buffer with formpiston.
Preferably, the floating die is the bending structure of " L " type, and vibrator is located inside the bending of floating die.
Preferably, the formpiston is stair-stepping cylindrical structure, and formpiston moves downward process and connects with pressure buffer
Touching.
Preferably, the spring part includes main shaft and spring, and one end of main shaft and molding die main body are connected, main shaft hair
The other end passes through floating die, and spring pocket is set to main shaft and between floating die and molding die main body.
Preferably, the purity of calcium carbonate is 97.5% in the step S1, and the purity of aluminium oxide is 97.5%, neodymia
Purity is 99.5%, and the purity of titanium dioxide is 99.6%, and wherein mass percentage is respectively that calcium carbonate accounts for 30%, aluminium oxide
10% is accounted for, neodymia accounts for 25%, and titanium dioxide accounts for 35%.
The beneficial effects of the present invention are:
1, a kind of media ceramic resonance manufacturing method provided by the present invention can make dielectric material reach high q-factor, big
Power, high stable, temperature coefficient are small and adjustable.
2, of the invention to have wide range of applications, in addition to being applied to conventional microwave communication, field of mobile communication, it can also use
It works under conditions of environment very severe, such as aerospace, military affairs field.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of media ceramic resonance manufacturing method of the present invention；
Fig. 2 is the structure principle chart of quasi-iso static pressing molding die of the present invention.
Description of symbols: 1, floating die；2, backing-out punch；3, compressed powder filled cavity；4, pressure buffer；5, formpiston；
6, vibrator；7, spring part；8, main shaft；9, spring.
Specific embodiment
The present invention is described further in the following with reference to the drawings and specific embodiments:
As depicted in figs. 1 and 2, a kind of media ceramic resonance manufacturing method provided by the invention, comprising the following steps:
S1, the first powder of production, by calcium carbonate, aluminium oxide, neodymia, titanium dioxide is mixed to form the first microwave material,
Deionized water is added in the first microwave material and zirconia balls carry out ball milling, is dried after ball milling, then passes through steel wire
Mesh screen obtains the first powder.
Wherein the purity of calcium carbonate is 97.5%, and the purity of aluminium oxide is 97.5%, and the purity of neodymia is 99.5%, two
The purity of titanium oxide is 99.6%, and wherein mass percentage is respectively that calcium carbonate accounts for 30%, and aluminium oxide accounts for 10%, and neodymia accounts for
25%, titanium dioxide accounts for 35%.The time wherein dried is 48 hours, carries out briquetting after drying again；Product after briquetting
Be placed on 1150 DEG C to 1200 DEG C at a temperature of pre-burning two hours, by the porcelain formed after pre-burning crush, addition mass fraction be
Then 3 percent polyvinyl alcohol resin is granulated to obtain the first powder.
Carbon is added in the first powder after firing in S2, the second powder of production, the first powder calcination that step S1 is obtained
Sour barium, aluminum oxide, tantalum pentoxide, zinc oxide, strontium carbonate, silica form the second microwave material, described second
Deionized water is added in microwave material and zirconia balls carry out ball milling, dries after ball milling, is then obtained by steel wire mesh screen
To the second powder.
The ingredient of second microwave material is stocked up: barium carbonate 0.15~0.25 according to following molar ratio；Aluminum oxide 0.05
~0.15；Tantalum pentoxide 0.48~0.60；Zinc oxide 0.15~0.22；Strontium carbonate 0.01~0.03；Silica 0.03~
0.05。
Calcined second powder is put into polyesteramine bucket by the second powder calcination by S3, granulation, be added deionized water with
Zirconia balls are added polyvinyl alcohol water solution as binder and are granulated after dispersing agent and release agent ball milling is added.
Ball-milling Time is twenty four hours, easily facilitates granulation.
Granulation powder is pressed into small cylinder by S4, hydrostatic profile.
Small cylinder is radius 13.85mm, the small cylinder with holes of thickness 6.2mm.The step further include it is following step by step:
S41, raw material to be pressed is put into quasi-iso static pressing molding die, the top of quasi-iso static pressing molding die and static pressure machine
It is connected.
Quasi-iso static pressing molding die include: molding die main body, floating die 1, backing-out punch 2, pressure buffer 4, can on
Formpiston 5, vibrator 6 and the spring part 7 of lower movement, backing-out punch 2 are located at the inside of molding die main body, molding die body interior
It is filled out equipped with moudling powder and rushes chamber 3, moudling powder filled cavity 3 is located at the top of backing-out punch 2；The top of backing-out punch 2 and 4 phase of pressure buffer
Even, formpiston 5 is located at the top of pressure buffer 4；Pressure buffer 4 is cylindrical structure, and floating die 1 is located at moudling powder filling
The outside of chamber 3, floating die 1 are connected with vibrator 6, and floating die 1 is connected by spring part 7 with molding die main body, float
Former 1 can be moved synchronously when the downward compressed-bit of formpiston 5 is in powder to be compressed on pressure buffer 4 with formpiston 5.
Floating die 1 is the bending structure of " L " type, and vibrator 6 is located inside the bending of floating die 1.
Formpiston 5 is stair-stepping cylindrical structure, and formpiston 5 moves downward process and is in contact with pressure buffer.In this reality
It applies in example, the making material of formpiston 5 is steel die.
Spring part 7 includes main shaft 8 and spring 9, and one end of main shaft 8 and molding die main body are connected, the other end that main shaft 8 is sent out
Across floating die 1, spring 9 is sheathed on main shaft 8 and between floating die 1 and molding die main body.It is transported downwards in formpiston 5
During dynamic, formpiston 5 drives floating die 1 to move downward, and spring 9 is compressed.During formpiston 5 moves upwards, spring 9 is extensive
Floating die 1 is driven to move upwardly together during restoring length.
Pressure buffer 4 is made of material polyurethane elastomer.Pressure buffer 4 made of polyurethane elastomeric materials can be protected
It is uniform to hinder obtained global density, the product of smooth surface.After forming 100,000 products, 4 surface of pressure buffer is basic
Without abrasion, problem also is reduced without any size variation and extrusion performance.In extrusion process, 4 surface of pressure buffer and quilt
Compression of the moulding material in each contact point is identical, that is, is exactly that there is no frictions.Pressure buffer 4 is under the high pressure of 1000MPa
Still possess very high wearability and ability to work, wherein MPa is pressure unit.Compared to using pressure buffer 4 made of rubber
Intensity increases 6 to 8 times.Unit wearability is 3 times of the pressure buffer 4 being formed from steel, than pressing made of epoxy resin
4 high 60 times of power buffer.
S42, powder to be compressed is inserted in quasi-iso static pressing molding die.
It is high that the amount for inserting powder to be compressed is no more than the cyclic annular hole formed between molding die main body and pressure buffer 4
Degree.
S43, after inserting powder to be compressed into quasi-iso static pressing molding die to step S22, static pressure machine work when compress
Powder to be compressed in quasi-iso static pressing molding die, compression powder form in by compression process.
The telescopic end of static pressure machine is connected with formpiston 5, and static pressure machine is able to drive formpiston 5 during the work time and moves up and down.
When static pressure machine drives formpiston 5 to move downward, the compression of formpiston 5 is located at the band compression powder on 4 top of pressure buffer.Powder to be compressed
In by compression process, powder to be compressed reduces in the height direction, expands form powder radially.
Formpiston 5 runs the condition that quasi-iso static pressing can be once constituted in molding die main body, therefore production of the invention
Efficiency is higher, and the mechanization degree for taking process is unloaded depending on moudling powder filling process and compacting product.The compacting of certain products be
It is carried out under the automatic work system of press.
When quasi-iso static pressing, because pressure is imposed on simultaneously by the entire outer surface of pressure material, external friction pressure is substantially not present
Power loss, so the forming pressure of product reduces 30~50% than common static pressure method.In this way, powder particle and pressing mold wall rub
Wipe energy loss just substantially reduce, with this method suppress green body, than in common metal mould with the green body of same pressure forming
With higher density and homogeneity.Someone points out that, when squeezing powder, the gross pressure for being applied to product is made of three parts:
P=P1+P2+P3
Wherein P1 is the pressure for being compacted powder；P2 is the pressure for overcoming powder Yu former wall friction；P3 be
Higher than the enhancing pressure of casting die averag density area particle contact point；P is the gross pressure for being applied to product.
Pressure caused by P3 be because of radial pressure part caused by, powder density can be caused in component uneven.Quasi-iso static pressing
When, P2=P3=0, that is, the pressure applied is only used for compacting moudling powder, is made whole under lower forming pressure to ensure
The product of even density.
S44, in step S23 powder compression molding after, static pressure machine reverse operation, take out be located at quasi-iso static pressing form
Powder in mold after compression forming.
The quasi-iso static pressing forming method used through the invention, it is ensured that the excellent quality of product has economic well
Benefit, manufacturing cost are lower.11mm diameter and 125mm are formed separately in quasi-iso static pressing method of the present invention and hydrostatic
Show when long pipe fitting, the design cost for implementing quasi-iso static pressing is only the 1/20 of hydrostatic pressure expense.The production and standard pressure of pressing mold
The acquisition expenses of machine is substantially reduced.The design of quasi-iso static pressing significantly shortens with the production grasp time limit, and production site also reduces many.
The service life of rubber membrane is 250 pressures time when hydrostatic pressure, and polyurethane pressure buffer is then at 100,000 times or more.
It should be noted that the use of the isostatic pressing method of elastic fluid being at present a kind of most simple in all known pressings
Just general method.Quasi-iso static pressing method can be widely used for shaped ceramic, metal, graphite composite powder product, silicon devitrified glass, iron oxygen
Body, abrasive product can also be used to produce refractory product.
The material made of step S4 is the small cylinder structure with holes of radius 13.85mm, thickness 6.2mm.
The small cylinder suppressed is first carried out binder removal by S5, sintering, then product is obtained by sintering, after sintering
Raw material made annealing treatment, analysis measurement then is carried out to material；The data of analysis measurement include: preburning powdered material and sintering sample
The crystal phases of product forms and morphology, the relative dielectric constant and dielectric loss of material, the frequency-temperature coefficient of material and
Microwave dielectric property simultaneously carries out high/low-temperature impact test.
In the present embodiment, for the temperature of sintering within the temperature range of 1600 DEG C~1650 DEG C, the time of sintering is 20
Hour.Binder removal keeps the temperature dumping method using step, and in binder removal, because volume is big, density is high, is difficult thoroughly to drain Jie
The bonding agent of ceramics middle section, therefore pass through repetition test, it is thoroughly solved substantially using step heat preservation dumping method
The problem of product media ceramic dumping not to the utmost.
Sintered material is polished directly processing, is then being stained with bracket, is waited to be tested.In sintering process,
Using the heating curve and temperature lowering curve of a set of science, making large volume media ceramic, stress is most always in heating and cooling process
It is small, to be unlikely to crack, solve the problems, such as to perplex many years in industry.
By the processing of annealing process, solves the problems, such as the internal stress of large scale medium ceramic material, big after reducing
The possibility of fever cracking, in addition also substantially increases the Q value of dielectric resonator when power heating and cooling.
Analysis measurement is the crystal phase composition that sample is analyzed by using X-ray diffraction analysis, with scanning electron microscope point
Analyse the crystal phase composition and morphology of preburning powdered material and sintered sample；It is normal with respect to dielectric with dielectric resonator method measurement material
Several and dielectric loss；Use the frequency-temperature coefficient and microwave dielectric property of microwave network analyzer and exact constant temperature case measurement material
Can, the temperature coefficient of resonance frequency of material measures within the scope of -40 DEG C~80 DEG C.Microwave analysis instrument is using " HP8703A "
Microwave network analysis instrument, the equipment are existing mature technology equipment.
S6, step S5 qualification product be put in storage.
The product supported through the invention is due to using multiple technologies innovation, structure innovation, thus its application model
It encloses and increases.High q-factor, high-power, high stable (temperature coefficient is small and adjustable) can be reached, therefore make the rectangle system manufactured
Several filters or duplexer are possibly realized.Therefore application range is more extensive, except conventional microwave communication, field of mobile communication
Outside, it can also use and work under conditions of environment very severe, such as aerospace, military affairs field.
Those of ordinary skill in the art will understand that the embodiments described herein, which is to help reader, understands this hair
Bright principle, it should be understood that protection scope of the present invention is not limited to such specific embodiments and embodiments.This field
Those of ordinary skill disclosed the technical disclosures can make according to the present invention and various not depart from the other each of essence of the invention
The specific variations and combinations of kind, these variations and combinations are still within the scope of the present invention.
Claims (10)
1. a kind of media ceramic resonance manufacturing method, which comprises the following steps:
S1, the first powder of production, by calcium carbonate, aluminium oxide, neodymia, titanium dioxide is mixed to form the first microwave material, the
Deionized water is added in one microwave material and zirconia balls carry out ball milling, is dried after ball milling, then passes through steel wire mesh screen
Obtain the first powder；
Carbonic acid is added in the first powder after firing in S2, the second powder of production, the first powder calcination that step S1 is obtained
Barium, aluminum oxide, tantalum pentoxide, zinc oxide, strontium carbonate, silica form the second microwave material, micro- described second
Deionized water is added in wave material and zirconia balls carry out ball milling, dries after ball milling, is then obtained by steel wire mesh screen
Second powder；
Calcined second powder is put into the second powder calcination polyesteramine bucket, deionized water and dioxy is added by S3, granulation
Change zirconium ball, polyvinyl alcohol water solution is added as binder and is granulated after dispersing agent and release agent ball milling is added；
Granulation powder is pressed into small cylinder with holes by S4, hydrostatic profile；
The small cylinder suppressed is first carried out binder removal by S5, sintering, then obtains product, sintered original by sintering
Material is made annealing treatment, and then carries out analysis measurement to material；The data of analysis measurement include: preburning powdered material and sintered sample
Crystal phase composition and morphology, the relative dielectric constant and dielectric loss of material, the frequency-temperature coefficient and microwave of material
Dielectric properties simultaneously carry out high/low-temperature impact test；
S6, step S5 qualification product be put in storage.
2. a kind of media ceramic resonance manufacturing method according to claim 1, which is characterized in that the step S4 is also wrapped
Include following steps:
S41, raw material to be pressed is put into quasi-iso static pressing molding die, top and the static pressure machine phase of quasi-iso static pressing molding die
Even；
S42, powder to be compressed is inserted in quasi-iso static pressing molding die；
S43, after inserting powder to be compressed into quasi-iso static pressing molding die to step S22, standard etc. is compressed when static pressure machine works
Powder to be compressed in hydrostatic profile mold, compression powder form in by compression process；
S44, in step S23 powder compression molding after, static pressure machine reverse operation, take out be located at quasi-iso static pressing molding die
Powder after middle compression forming.
3. a kind of media ceramic resonance manufacturing method according to claim 2, which is characterized in that in the step S41
Quasi-iso static pressing molding die include: molding die main body, floating die (1), backing-out punch (2), pressure buffer (4), can on
Formpiston (5), vibrator (6) and the spring part (7) of lower movement, backing-out punch (2) are located at the inside of molding die main body, molding die
Body interior is filled out equipped with moudling powder and is rushed chamber (3), and moudling powder filled cavity (3) is located at the top of backing-out punch (2)；Backing-out punch (2) it is upper
Portion is connected with pressure buffer (4), and formpiston (5) is located at the top of pressure buffer (4)；Pressure buffer (4) is cylindrical body knot
Structure, floating die (1) are located at the outside of moudling powder filled cavity (3), and floating die (1) is connected with vibrator (6), floating die
(1) it is connected by spring part (7) with molding die main body, floating die (1) is in the downward compressed-bit of formpiston (5) in pressure buffer
(4) it when powder to be compressed on, can be moved synchronously with formpiston (5).
4. a kind of media ceramic resonance manufacturing method according to claim 3, which is characterized in that the floating die
It (1) is the bending structure of " L " type, vibrator (6) is located inside the bending of floating die (1).
5. a kind of media ceramic resonance manufacturing method according to claim 3, which is characterized in that the formpiston (5) is
Stair-stepping cylindrical structure, formpiston (5) move downward process and are in contact with pressure buffer.
6. a kind of media ceramic resonance manufacturing method according to claim 3, which is characterized in that the spring part (7)
Including main shaft (8) and spring (9), one end of main shaft (8) and molding die main body are connected, and the other end of main shaft (8) hair passes through floating
Dynamic former (1), spring (9) are sheathed on main shaft (8) and between floating die (1) and molding die main bodys.
7. a kind of media ceramic resonance manufacturing method according to claim 1, which is characterized in that carbon in the step S1
The purity of sour calcium is 97.5%, and the purity of aluminium oxide is 97.5%, and the purity of neodymia is 99.5%, and the purity of titanium dioxide is
99.6%, wherein mass percentage is respectively that calcium carbonate accounts for 30%, and aluminium oxide accounts for 10%, and neodymia accounts for 25%, titanium dioxide
Account for 35%.
8. a kind of media ceramic resonance manufacturing method according to claim 1, which is characterized in that shape in the step S2
At the ingredient of the second microwave material, stock up according to following molar ratio: barium carbonate 0.15~0.25；Aluminum oxide 0.05~
0.15；Tantalum pentoxide 0.48~0.60；Zinc oxide 0.15~0.22；Strontium carbonate 0.01~0.03；Silica 0.03~
0.05。
9. a kind of media ceramic resonance manufacturing method according to claim 1, which is characterized in that small in the step S4
Cylindrical body is radius 13.85mm, the small cylinder with holes of thickness 6.2mm.
10. a kind of media ceramic resonance manufacturing method according to claim 1, which is characterized in that in the step S5
By being sintered in obtained product, for the temperature of sintering within the temperature range of 1600 DEG C~1650 DEG C, the time of sintering is 20
Hour.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110041069A (en) * | 2019-05-31 | 2019-07-23 | 河南科技大学 | A kind of microwave dielectric ceramic materials and preparation method thereof |
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| CN104030677A (en) * | 2014-06-24 | 2014-09-10 | 天津大学 | Low-loss multilayer ceramic capacitor dielectric material and preparation method thereof |
| CN104942285A (en) * | 2015-06-30 | 2015-09-30 | 成都易态科技有限公司 | Forming method and mold for honeycomb intermetallic compound filter element |
| CN107935594A (en) * | 2018-01-08 | 2018-04-20 | 张家港保税区灿勤科技有限公司 | The preparation method of low-k ultra high quality factor microwave-medium ceramics |
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| JP2000026161A (en) * | 1998-07-10 | 2000-01-25 | Matsushita Electric Ind Co Ltd | Dielectric ceramic composition |
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Application publication date: 20181218 |