CN106630974A - Flash sintering method of low-temperature flash sintering ceramic and obtained ceramic and device thereof - Google Patents

Flash sintering method of low-temperature flash sintering ceramic and obtained ceramic and device thereof Download PDF

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CN106630974A
CN106630974A CN201611061915.9A CN201611061915A CN106630974A CN 106630974 A CN106630974 A CN 106630974A CN 201611061915 A CN201611061915 A CN 201611061915A CN 106630974 A CN106630974 A CN 106630974A
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ceramic
sintering
ceramics
flash
temperature
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徐晨
蔡仕魁
王小英
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Institute of Materials of CAEP
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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Abstract

The invention relates to the filed of ceramic sintering, in particular to a flash sintering method of a low-temperature flash sintering ceramic and an obtained ceramic and a device thereof. The flash sintering method of the low-temperature flash sintering ceramic comprises the following steps: loading a voltage at two ends of a ceramic green body, and setting a current upper limit; heating the ceramic green body, when the temperature reaches a characteristic temperature, the temperature suddenly rising and meanwhile bright spots appearing around an anode, then a flash phenomenon appearing, and completing sintering of the ceramic green body within several seconds. According to the method, the flash phenomenon occurs when the temperature is heated to a certain characteristic temperature through voltage assist, and the sintering is completed within several seconds, so that the sintering temperature can be effectively reduced, and the sintering time can be greatly shortened. Moreover, according to the sintering method, the energy resources are saved, the sintering efficiency is improved, the production cost is reduced, ceramic products with large dimensions and complicated shapes can be produced, the density of a sintered ceramic block body is generally more than 95%, and the quality of the sintered and obtained ceramic is excellent.

Description

A kind of flash of light sintering method of low temperature Fast Sintering ceramics and obtained ceramics and its Device
Technical field
The present invention relates to ceramic post sintering field, in particular to a kind of flash of light sintering side of low temperature Fast Sintering ceramics Method and obtained ceramics and its device.
Background technology
Fast Sintering is the main trend of ceramic sintering technology in the world in recent years.Meet the burning of Fast Sintering requirement at present Knot technology is mainly discharge plasma sintering (SPS).Plasma be dissociation high-temperature electric conduction gas, the higher shape of reactivity State.Because plasma temperature is typically at 4000~10999 DEG C, its gaseous molecular and atom are in advanced activation state, and wait Degree of ionization is very high in ionized gas, and these properties cause plasma to become a kind of very important material preparation and process Technology.The sintering process is caused particle equably itself to produce Joule heat and is made particle surface activation become electric discharge using pulse current Plasma, accelerates diffusion process so that bridge joint and then at a lower temperature Fast Sintering are easier to make between ceramic particle Powder is fine and close.SPS technologies have the advantages that quickly, low temperature, high efficiency, can be used to prepare metal, ceramics, nano material, amorphous Material, composite, functionally gradient material (FGM) etc., therefore a large amount of concerns and research of educational circles and industry have been obtained in recent years.Wherein study Most is functional material, including thermoelectric material, magnetic material, FGM, composite functional material and nano functional material Material etc..Additionally, prepare SPS in non-crystaline amorphous metal, marmem, diamond etc. also to have made to attempt.At present abroad, especially Japan has carried out the research that more multiplex SPS prepares new material, and portioned product puts into production.
However, the sintering basis mechanism of SPS is not fully understood at present, needs carry out a large amount of practices have been come with theoretical research It is kind.Current SPS there is no method sintering to accomplish complete densification more than the product of 300mm sizes due to the capacity limit of pulse current. And, SPS current design there is no method to make complex-shaped product.In addition, the price of SPS is costly, although there is industry The product of change, but sinter relatively costly, the still less production for being applied to actual ceramic product at present.
In view of this, it is special to propose the present invention.
The content of the invention
The first object of the present invention is to provide a kind of flash of light sintering method of low temperature Fast Sintering ceramics, and the method passes through Voltage is aided in, and when temperature is heated to certain characteristic temperature, phosphere occurs, and completes to sinter within the several seconds, and this feature temperature 200 DEG C lower than the common pressureless sintering temperature of respective material and more than, so not only can effectively reduce sintering temperature, but also can Greatly shorten sintering time.Additionally, the sintering process energy saving, raising sinter efficiency, reduce production cost and can produce big chi Very little complex-shaped ceramic product, the ceramic block density of sintering is typically more than 95%, and the ceramic mass that sintering is obtained It is superior.
The second object of the present invention is the dress of the flash of light sintering method for providing the low temperature Fast Sintering ceramics for implementing described Put.
In order to realize the above-mentioned purpose of the present invention, spy employs the following technical solutions:
A kind of flash of light sintering method of low temperature Fast Sintering ceramics, comprises the following steps:
In ceramic green two ends on-load voltage, the setting electric current upper limit;
The ceramic green is heated, after phosphere occurs in surrounding them, deenergization, insulation, cooling completes to burn Knot.
Wherein, the electric current of setting is arranged according to following methods:First to ceramic green under certain voltage such as 200- Preliminary experiment is carried out under 1000V/cm voltages, when being heated to characteristic temperature, electric current rises sharply while there is the phosphere of electrical breakdown, and The upper current limit of setting is the electric current that electrical breakdown does not occur, that is, the upper current limit for arranging is less than electric current during electrical breakdown.Therefore, root Corresponding upper current limit is selected according to preliminary experiment.
A kind of flash of light sintering method of low temperature Fast Sintering ceramics that the present invention is provided, the sintering process is existed using certain ceramics The principle that resistance is gradually lowered in temperature-rise period, when temperature is increased to some critical point, i.e. temperature certain characteristic temperature is heated to When, is there is shining point by the resistance of ceramic green to a relatively low resistance level and simultaneously in positive pole in rapid drawdown.It is fixed according to ohm Rule, now will have great electric current moment by ceramic green on ceramic green, therefore the very short time after shining point occurs The interior phenomenon for producing similar electrical breakdown, in the short period of time Fast Sintering is fine and close to make ceramic green.Green compact after sintering due to Resistance is raised, and lightning phenomenon disappears therewith, until sintering is completed.The process of flash of light sintering is tied from there is shining point to phosphere Beam, completes sintering within the several seconds.The present invention aids in the characteristic temperature that reaches than the common pressureless sintering of respective material by voltage Temperature it is low 200 DEG C and more than, so not only can effectively reduce sintering temperature, but also be substantially shorter sintering time.The sintering Method energy saving, the ceramic product for improving sintering efficiency, reducing production cost and oversized shape complexity can be produced, the pottery of sintering Porcelain block density is typically more than 95%.
Inventor has found that the consistency of obtained ceramic green is higher, then the sintering temperature for needing in temperature-rise period is lower, And the ceramic performance that sintering is obtained is more preferably.
Further, the ceramic powders particle mean size used by the ceramic green is less than 500nm.
Preferably, the density of the ceramic green 50% and more than.
The drawing method of green compact includes colding pressing, isostatic cool pressing and moulding by casting etc..
Find in process of the test, ceramic green thickness is thinner, sinter the ceramic performance for obtaining more preferably.Preferably, it is described The thickness of ceramic green is 2mm-2cm.Such as the thickness of ceramic green can be 2mm, 5mm, 1cm, 2cm.
Further, the corresponding power supply of on-load voltage is direct current or the one kind in AC power, and the scope of voltage is not More than 2000V/cm.Such as can be 100V/cm, 500V/cm, 1000V/cm, 1500V/cm, 2000V/cm.The voltage model In enclosing, according to the concrete material for selecting, the current limit upper limit, phosphere can occur in its characteristic temperature, effectively reduce Sintering temperature.
Further, the mode in ceramic green two ends on-load voltage be green compact two ends drilling loading electrode or Using high-temperature electric conduction glue by electrode and green compact adhesion;
Electrode used is metal electrode or graphite electrode.
Further, in the ceramic green sintering process, do not carry extra pressure, sintering atmosphere be air, vacuum and Any one in non-air gas.
During sintering, the ceramics used by ceramic green are oxide ceramic, and the atmosphere of sintering selects air;If used by ceramic green Ceramics be non-oxidation ceramic, the atmosphere of sintering is typically from vacuum or non-air gas.
Further, the time of the insulation is within 10 minutes;Then dropped with the speed for being not more than 5 DEG C/min Temperature.To obtain the good ceramic product of crystal formation, and prevent the crackle caused because cooling rate is too fast.
Further, the ceramics used by the ceramic green are oxide ceramic or non-oxidation ceramic;
The oxide ceramic includes aluminum oxide, zirconia ceramics and its compound etc.;
The non-oxidation ceramic includes nitride ceramics, carbide ceramics and cermet and its compound etc.;
The nitride ceramics includes silicon nitride ceramics, boron nitride ceramics and its compound etc.;
The carbide ceramics includes silicon carbide ceramics and its compound etc..
Present invention also offers ceramics obtained in the flash of light sintering method of above-mentioned low temperature Fast Sintering ceramics.
Present invention also offers implement the device of the flash of light sintering method of above-mentioned low temperature Fast Sintering ceramics, including tubular type Electrode is loaded in stove, the tube furnace, and the electrode stretches out from the tube furnace and is connected with outside power supply;
The tube furnace is additionally provided with the position of observation window, the loading electrode and the observation window and is provided with cooling dress Put.
What the present invention was provided implements the device of the flash of light sintering method of above-mentioned low temperature Fast Sintering ceramics, and simple structure is The sintering of ceramics is provided very big facility.
Wherein, in the device that the present invention is provided, observation window can be being connected with image data acquiring and processing system.
Further, the observation window is arranged at the flange of the inlet end of the tube furnace, and the electrode is by described The flange of the outlet side of tube furnace stretches out.
Device in the present invention can be converted by high temperature process furnances, specifically, including tube furnace, device for cooling flange, Electrode, power supply, observation window and the image data acquiring being connected with observation window and processing system.Tube furnace is in sealing ventilation atmosphere Pattern under can prepare non-oxide ceramicses, oxide ceramics can be prepared under unsealed pattern.The air inlet hold-carrying of tube furnace Blue place has installed observation window additional, the image viewing being available in testing;The flange of outlet side has installed platinum electrode additional for sintered The voltage-drop loading of the green compact in journey, the electrode high-temperature resistant rubber guarantees insulation with flange.Because tube furnace is high temperature process furnances, And the requests for alternations of observation window and electrode does not use boiler tube plug on flange, flange can be caused at high temperature to cross heat affecting picture number According to collection and the loading of electric charge, accordingly, it would be desirable to cooling device, i.e., carry out the loading and repacking of water cooling plant to flange, and make Use recirculated water cold.Meanwhile, device for cooling flange can extend the service life of closed rubber ring, and improve boiler tube in ventilation atmosphere Pattern under air-tightness.Loading power carries out electric charge during heating and sintering by two platinum wires to ceramic green Loading, with realize green compact flash of light sinter.The power supply is orthogonal stream integrated power supply, can be entered under direct current or the pattern of exchange Row flash of light sintering, peak power is 3000-4000 watt.The power supply possesses the real time data output function of voltage source.Additionally, also Image data acquiring and processing system can be equipped with, the process of flash of light sintering furnace is recorded by observation window, and real time record adds (power supply need to possess the function of voltage x current data output in real time to the voltage and current signal of load power supply, and computer need to be equipped with electricity The Real-time Collection software of piezoelectricity flow data), be available for study in Germicidal efficacy and data record.
Compared with prior art, beneficial effects of the present invention are:
(1) a kind of flash of light sintering method of low temperature Fast Sintering ceramics that the present invention is provided, is aided in, in temperature by voltage When being heated to certain characteristic temperature, there is phosphere, sintering is completed within the several seconds, and this feature temperature is more common than respective material Pressureless sintering temperature it is low 200 DEG C and more than, so not only can effectively reduce sintering temperature, but also when being substantially shorter sintering Between.
(2) the sintering process energy saving of present invention offer, raising sinters efficiency, reduces production cost and can produce large scale Complex-shaped ceramic product, the ceramic block density of sintering is typically more than 95%, and the ceramic mass that sintering is obtained is excellent More.
(3) present invention also offers implementing the device of the flash of light sintering method of low temperature Fast Sintering ceramics, simple structure is The sintering of ceramics carries out offer facility.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing The accompanying drawing to be used needed for having technology description is briefly described.
Fig. 1 is the schematic diagram of the flash of light sintering furnace that the embodiment of the present invention 1 is provided;
Fig. 2 is the profile of the flash of light sintering furnace that the embodiment of the present invention 1 is provided;
In figure:1- tube furnaces;2- device for cooling flange;3- electrodes;4- power supplys;5- observation windows.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will Understand, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the present invention.It is unreceipted concrete in embodiment Condition person, the condition advised according to normal condition or manufacturer is carried out.Agents useful for same or the unreceipted production firm person of instrument, are The conventional products that commercially available purchase is obtained can be passed through.
Embodiment 1
The present invention is provided with a set of device for implementing the flash of light sintering method of low temperature Fast Sintering ceramics, and the device is A set of flash of light sintering furnace (MX-100).In the Equipment Foundations, the flash of light sintering of ceramics can be carried out.
MX-100 is by tube furnace 1, device for cooling flange 2, electrode 3, power supply 4, observation window 5 and the figure being connected with observation window As data acquisition and processing system.Tube furnace 1 can prepare non-oxide ceramicses under the pattern of sealing ventilation atmosphere, in non-tight Pattern under can prepare oxide ceramics, maximum temperature up to 1700 degrees Celsius, therefore, can meet great majority oxidation and it is non-oxide The preparation demand of ceramics.
The inlet end flange of tube furnace 1 has installed observation window 5 additional, the image viewing being available in testing;The flange of outlet side Place has installed platinum electrode additional for the voltage-drop loading of the ceramic green in sintering process, and the electrode high-temperature resistant rubber is true with flange Protect insulation.
Because the requests for alternations that tube furnace is observation window 5 and electrode 3 on high temperature process furnances, and flange does not use boiler tube Plug, can cause at high temperature flange to cross the loading of heat affecting image data acquiring and electric charge, it is therefore desirable to cooling device, i.e., to method Orchid carries out the loading and repacking of water cooling plant, and using recirculated water cold.Meanwhile, device for cooling flange can extend closed rubber The service life of circle, and improve air-tightness of the boiler tube under the pattern of ventilation atmosphere.
Loading power carries out the loading of electric charge by two platinum wires during heating and sintering to ceramic green, with Realize the flash of light sintering of green compact.The power supply is orthogonal stream integrated power supply, can carry out flash of light burning under direct current or the pattern of exchange Knot, peak power is 3000-4000 watt.The power supply possesses the real time data output function of voltage source.MX-100 is equipped with figure As data acquisition and processing system, the process of the sintering furnace that glistened by observation window record, and real time record loading power (power supply need to possess the function of voltage x current data output in real time to voltage and current signal, and computer need to be equipped with voltage x current number According to Real-time Collection software), be available for study in Germicidal efficacy and data record.
Embodiment 2
Ceramic green is sintered using the device in embodiment 1, is comprised the following steps that:
The ceramic green of oxygenerating zircon ceramic nano powder, zirconium oxide are pushed in the pressure of 200MPa first with isostatic cool pressing Ceramic powder purity is 99.95%, and average grain diameter is 160nm, and the ceramic green density after isostatic cool pressing is 60%, and thickness is 1cm;
Drill at the two ends of green compact, inserted in the hole the green compact that are fastened with platinum electrode, interelectrode distance is about 100mm;
Electrode is run wires on dc source, to turn on the power, power supply 200V/cm, the setting electric current upper limit is given 0.5A;
Setting tube furnace heating program:From the beginning of room temperature, 1000 degrees Celsius are heated up to 8 degrees Celsius per minute of speed, Then 1400 degrees Celsius are warming up to 5 degrees Celsius per minute of speed;
Later on heating program, opens water cooling unit, starts simultaneously at the collection of image data acquiring and voltage x current data;
When furnace temperature rises to 1280-1350 degree Celsius of interval, can see that little Bai occurs in positive pole by image capturing system Point, subsequently hot spot expands within the several seconds, the phosphere for similar electrical breakdown then occur, and at the same time, voltage x current data are adopted Collecting system shows that electric current is rapidly increased to the upper limit of 0.5A, and afterwards voltage begins to decline after electric current rises to higher limit;
After phosphere terminates, immediately disconnect ceramic block on load power supply, while insulation 5 minutes, subsequently with per point The speed that 5 degrees Celsius of clock starts cooling;
After furnace temperature is down to room temperature, water cooling unit is closed, unload electrode, take out ceramic block.
Obtained zirconia ceramics block Jing determines its density for 5.75g/cm3
Embodiment 3
Ceramic green is sintered using the device in embodiment 1, is comprised the following steps that:
The ceramic green of preparing silicon carbide ceramic nano powder, carborundum are pushed in the pressure of 200MPa first with isostatic cool pressing Ceramic powder purity is 99.5%, and average grain diameter is 80nm, and the ceramic green density after isostatic cool pressing is 55%, and thickness is 2mm;
Drill at the two ends of ceramic green, inserted in the hole the green compact that are fastened with platinum electrode, interelectrode distance is about 100mm;
Electrode is run wires on dc source, to turn on the power, power supply 1000V/cm, the setting electric current upper limit is given 0.5A;
Setting tube furnace heating program:From the beginning of room temperature, 1000 degrees Celsius are heated up to 8 degrees Celsius per minute of speed, Then 1650 degrees Celsius are warming up to 5 degrees Celsius per minute of speed;
Lead to argon gas atmosphere in tube furnace boiler tube, flow velocity is 200ml/min;
Later on heating program, opens water cooling unit, starts simultaneously at the collection of image data acquiring and voltage x current data;
When furnace temperature rises to 1600-1650 degree Celsius of interval, can see that little Bai occurs in positive pole by image capturing system Point, subsequently hot spot expands within the several seconds, the phosphere for similar electrical breakdown then occur, and at the same time, voltage x current data are adopted Collecting system shows that electric current is rapidly increased to the upper limit of 0.5A, and afterwards voltage begins to decline after electric current rises to higher limit;
After phosphere terminates, immediately disconnect ceramic block on load power supply, while insulation 5 minutes, subsequently with per point The speed that 5 degrees Celsius of clock starts cooling;
After furnace temperature is down to room temperature, water cooling unit is closed, unload electrode, take out ceramic block.
Obtained silicon carbide ceramics block density is 3.10g/cm3
Embodiment 4
Ceramic green is sintered using the device in embodiment 1, is comprised the following steps that:
The ceramic green of preparing silicon carbide ceramic nano powder, carborundum are pushed in the pressure of 200MPa first with isostatic cool pressing Ceramic powder purity is 99.5%, and average grain diameter is 450nm, and the ceramic green density after isostatic cool pressing is 50%, and thickness is 2cm;
Drill at the two ends of ceramic green, inserted in the hole the green compact that are fastened with platinum electrode, interelectrode distance is about 100mm;
Electrode is run wires on dc source, to turn on the power, power supply 2000V/cm, the setting electric current upper limit is given 0.4A;
Setting tube furnace heating program:From the beginning of room temperature, 1000 degrees Celsius are heated up to 8 degrees Celsius per minute of speed, Then 1650 degrees Celsius are warming up to 5 degrees Celsius per minute of speed;
Lead to argon gas atmosphere in tube furnace boiler tube, flow velocity is 200ml/min;
Later on heating program, opens water cooling unit, starts simultaneously at the collection of image data acquiring and voltage x current data;
When furnace temperature rises to 1600-1650 degree Celsius of interval, can see that little Bai occurs in positive pole by image capturing system Point, subsequently hot spot expands within the several seconds, the phosphere for similar electrical breakdown then occur, and at the same time, voltage x current data are adopted Collecting system shows that electric current is rapidly increased to the upper limit of 0.4A, and afterwards voltage begins to decline after electric current rises to higher limit;
After phosphere terminates, immediately disconnect ceramic block on load power supply, while insulation 5 minutes, subsequently with per point The speed that 3 degrees Celsius of clock starts cooling;
After furnace temperature is down to room temperature, water cooling unit is closed, unload electrode, take out ceramic block.
Obtained silicon carbide ceramics block density is 3.05g/cm3
Embodiment 5
Ceramic green is sintered using the device in embodiment 1, is comprised the following steps that:
The ceramic green of boron nitride ceramics nano powder, boron nitride are suppressed under the pressure of 200MPa first with isostatic cool pressing Ceramic powder purity is 99%, and average grain diameter is 150nm, and the ceramic green density after isostatic cool pressing is 60%, and thickness is 5mm;
Drill at the two ends of ceramic green, inserted in the hole the green compact that are fastened with platinum electrode, interelectrode distance is about 80mm;
Electrode is run wires on dc source, to turn on the power, power supply 2000V/cm, the setting electric current upper limit is given 0.5A;
Setting tube furnace heating program:From the beginning of room temperature, 1000 degrees Celsius are heated up to 8 degrees Celsius per minute of speed, Then 1600 degrees Celsius are warming up to 5 degrees Celsius per minute of speed;
Lead to nitrogen atmosphere in tube furnace boiler tube, flow velocity is 200ml/min;
Later on heating program, opens water cooling unit, starts simultaneously at the collection of image data acquiring and voltage x current data;
When furnace temperature rises to 1500-1600 degree Celsius of interval, can see that little Bai occurs in positive pole by image capturing system Point, subsequently hot spot expands within the several seconds, the phosphere for similar electrical breakdown then occur, and at the same time, voltage x current data are adopted Collecting system shows that electric current is rapidly increased to the upper limit of 0.5A, and afterwards voltage begins to decline after electric current rises to higher limit;
After phosphere terminates, immediately disconnect ceramic block on load power supply, while insulation 5 minutes, subsequently with per point The speed that 4 degrees Celsius of clock starts cooling;
After furnace temperature is down to room temperature, water cooling unit is closed, unload electrode, take out ceramic block.
Obtained boron nitride ceramics block density is 2.16g/cm3
Although illustrate and describing the present invention with specific embodiment, but will be appreciated that without departing substantially from the present invention's Many other changes and modification can be made in the case of spirit and scope.It is, therefore, intended that in the following claims Including all such changes and modifications belonged in the scope of the invention.

Claims (10)

1. the flash of light sintering method of a kind of low temperature Fast Sintering ceramics, it is characterised in that comprise the following steps:
In ceramic green two ends on-load voltage, the setting electric current upper limit;
The ceramic green is heated, after phosphere occurs in surrounding them, deenergization, insulation, cooling completes sintering.
2. the flash of light sintering method of low temperature Fast Sintering according to claim 1 ceramics, it is characterised in that the ceramic green Ceramic powders particle mean size used by base is less than 500nm;
Preferably, the density of the ceramic green 50% and more than;
Preferably, the thickness of the ceramic green is 2mm-2cm.
3. the flash of light sintering method of low temperature Fast Sintering according to claim 1 ceramics, it is characterised in that on-load voltage pair The power supply answered is direct current or the one kind in AC power, and the scope of voltage is not more than 2000V/cm.
4. the flash of light sintering method of low temperature Fast Sintering according to claim 3 ceramics, it is characterised in that in the ceramics The mode of green compact two ends on-load voltage is by electrode and green compact in green compact two ends drilling loading electrode or using high-temperature electric conduction glue Adhesion;
Electrode used is metal electrode or graphite electrode.
5. the flash of light sintering method of low temperature Fast Sintering according to claim 1 ceramics, it is characterised in that the ceramic green In base sintering process, extra pressure is not carried, sintering atmosphere is any one in air, vacuum and non-air gas.
6. the ceramic flash of light sintering method of low temperature Fast Sintering according to any one of claim 1-5, it is characterised in that institute The time of insulation is stated within 10 minutes;Then lowered the temperature with the speed for being not more than 5 DEG C/min.
7. the ceramic flash of light sintering method of low temperature Fast Sintering according to any one of claim 1-5, it is characterised in that institute It is oxide ceramic or non-oxidation ceramic to state the ceramics used by ceramic green;
The oxide ceramic includes aluminum oxide, zirconia ceramics and its compound etc.;
The non-oxidation ceramic includes nitride ceramics, carbide ceramics and cermet and its compound etc.;
The nitride ceramics includes silicon nitride ceramics, boron nitride ceramics and its compound etc.;
The carbide ceramics includes silicon carbide ceramics and its compound etc..
8. ceramic obtained in the flash of light sintering method of the low temperature Fast Sintering ceramics described in any one of claim 1-7.
9. the device of the ceramic sintering method that glistens of the low temperature Fast Sintering described in any one of claim 1-7, its feature are implemented It is, including tube furnace, loading electrode in the tube furnace, and the electrode stretch out and outside electricity from the tube furnace Source connects;
The tube furnace is additionally provided with the position of observation window, the loading electrode and the observation window and is provided with cooling device.
10. device according to claim 9, it is characterised in that the observation window is arranged at the inlet end of the tube furnace Flange, the electrode stretched out by the flange of the outlet side of the tube furnace.
CN201611061915.9A 2016-11-25 2016-11-25 Flash sintering method of low-temperature flash sintering ceramic and obtained ceramic and device thereof Pending CN106630974A (en)

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CN107881560A (en) * 2017-11-24 2018-04-06 苏州阿特斯阳光电力科技有限公司 A kind of preprocess method of crystalline silicon rod
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CN108911752A (en) * 2018-08-01 2018-11-30 渤海大学 A method of synthesizing ceramic material under the conditions of extra electric field
CN108947531B (en) * 2018-08-21 2021-05-14 山东晶盾新材料科技有限公司 Flash firing preparation method of rare earth oxide transparent ceramic scintillator
CN108947531A (en) * 2018-08-21 2018-12-07 苏州山人纳米科技有限公司 The flash burning preparation method of rare earth oxide transparent ceramic scintillator
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CN111440002A (en) * 2020-04-03 2020-07-24 清华大学深圳国际研究生院 Ceramic sintering method and ceramic sintering device
CN111362707A (en) * 2020-04-03 2020-07-03 清华大学深圳国际研究生院 Room temperature ceramic sintering method and ceramic
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Application publication date: 20170510