CN101644531A - Ceramic densifying method and device - Google Patents
Ceramic densifying method and device Download PDFInfo
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- CN101644531A CN101644531A CN200810134298A CN200810134298A CN101644531A CN 101644531 A CN101644531 A CN 101644531A CN 200810134298 A CN200810134298 A CN 200810134298A CN 200810134298 A CN200810134298 A CN 200810134298A CN 101644531 A CN101644531 A CN 101644531A
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Abstract
The invention relates to a ceramic body sintering device, which comprises an applicator with a simple-module microwave heating cavity, a thermal insulation structure arranged in the heating cavity, abase arranged in the thermal insulation structure, the ceramic body arranged at the position close to the base, a magnetron and a temperature measuring device, wherein the microwave coupling temperature of the base is lower than the temperature of the ceramic body. The invention also relates to a related method.
Description
Technical field
[0001] the present invention relates to microwave sintering method and device, for example the microwave sintering of ceramic material.
Background technology
[0002] in the following content of the discussions, with reference to some structures and/or method.But it is the approval that these structures and/or method is constituted prior art that institute's reference content should not be considered as.The applicant clearly keeps these structures of proof and/or method can not be as the right of prior art.
[0003] performance of ceramic and the production cost heat-treated parameter that therefore causes as burn till or the influence of sintering temperature and time very big.Sintering is insufficient, can cause densified insufficient.And excessively sintering can produce unwanted performance, reduces as the flexural strength that causes more greatly because of particle size.
When [0004] using traditional kiln, sintering time can not shorten arbitrarily.When firing rate was higher, the surface temperature of carrying out the base substrate (hereinafter to be referred as " sintered body ") of sintering was higher than its internal temperature.These thermogrades can cause tension force and crack.
[0005] now developmental research gone out the microwave heating technique of ceramic material, compare with traditional kiln, the firing rate that this technology can realize is much higher, and can carry out sintering at a lower temperature, so the process time of this technology can shorten greatly.
[0006] sintered blank know from experience to consume microwave energy, and heating kiln chamber institute directly the microwave energy of use is less relatively.Use microwave heating method, sintered blank is known from experience integral body and is heated.If only use microwave energy, the surface temperature of base substrate can be lower than internal temperature, thermograde occurs.When firing rate is higher,, then can cause and traditional heating technology similar problem if the direction of this thermograde is not opposite with the thermograde that the conventional sintering method produces,
[0007] use hybrid heating kiln, mechanism and advantage in conjunction with microwave and traditional heating can address this problem.In this technology, even if the firing rate height, ceramic body still can evenly heat.But, be difficult to control because of not measuring temperature in the microwave sintering process with metallic thermocouple.Remove in addition, because the microwave uptake in the material with the cause that material temperature raises and increases so-called " thermal runaway " and " focus " effect can take place also.Therefore, in the microwave sintering process, reliable temperature measuring result even more important than traditional sintering kiln.
[0008] problem that faces of the microwave sintering method of ceramic material is that many potteries at room temperature do not absorb energy.So, when this class pottery is carried out microwave firing or sintering process, must stride across room temperature and coupling temperature (T
c) between the temperature difference because pottery absorbs energy during temperature and is heated by microwave energy in coupling.Concerning zirconia ceramics, T
cBe about 700-750 ℃.Stride across this temperature difference, can use traditional resistance heated method, zirconia ceramics is heated to T
cPerhaps, can use base material.Pedestal is meant the material that can absorb the microwave radiation in room temperature.If base material is located at position near the base substrate that will be sintered, their can partly penetrate the microwave energy that is absorbed by radiant heat, thereby sample is heated.
[0009] known in the state of the art have two kinds of dissimilar microwave kiln.These kilns are called as single mode kiln or multimode kiln.
[0010] in the single mode kiln, its inside, applicator (applicator) or sintering chamber are as resonator.After the microwave of CF and wavelength entered resonator, a part was reflected by wall, forms standing wave in the chamber.These standing waves often form uniform wave field in the chamber.
[0011] in the multimode kiln, can produce very high Bomi degree in the resonator, but might not be uniform microwave field, for must be makes sample absorb microwave equably as far as possible.But only when using agitator or turntable, this absorption is only even and gratifying.For example, can use " microwave stirrer " to make magnetic field even, it is a kind of metal field agitator with appropriate geometry.Agitator is the complex-shaped rotating metallic wheel that is contained in kiln inside (mostly at furnace roof, below a suitable cover), and it can constantly change vibration mode.Perhaps, can be as the kitchen micro-wave oven, in heating process, sample is placed on allows its rotation in the chamber on the turntable.Most of microwave kiln that present sintered ceramic is used should all be the multimode kilns.
Summary of the invention
[0012] or multinomial shortcoming existing at prior art alternatively of the present invention.
[0013] according on the one hand, the invention provides a kind of ceramic body sintering equipment, this device comprises: the applicator with single mold microwave heating chamber; Be located at the thermal insulation structure in this heating chamber; The pedestal that be located in this thermal insulation structure, microwave coupling temperature is lower than ceramic body; Be placed on ceramic body near described base position; Magnetron; And, temperature measuring apparatus.
[0014] according on the other hand, the invention provides a kind of sintering method of ceramic body, this method comprises: a kind of device is provided, and it comprises: the applicator with single mold microwave heating chamber; Be located at the thermal insulation structure in this heating chamber; The pedestal that be located in this thermal insulation structure, microwave coupling temperature is lower than ceramic body; Magnetron; And, temperature measuring apparatus; Ceramic body is placed on the position of close described pedestal; Microwave is introduced in the chamber to heat described pedestal, described pedestal heats ceramic body until the coupling temperature that reaches ceramic body by the radiation heating mode, after reaching this temperature, ceramic body is heated to sufficiently high temperature in the sufficiently long time under microwave action, thereby make ceramic body densified.
[0015] according to more on the one hand, the invention provides a kind of method that forms the tooth goods, this method comprises: ceramic body is shaped, carries out the ceramic body sintering according to said method then.
Description of drawings
[0016] Fig. 1 is a microwave sintering device schematic diagram according to an aspect of the present invention.
[0017] Fig. 2 is pairing time of the sintering technology operated according to a further aspect of the invention-temperature relation figure.
[0018] Fig. 3 is the microphoto according to the microstructure of ceramics of principle of the invention sintering.
[0019] Fig. 4 is the microphoto according to the microstructure of ceramics of conventional art sintering.
The specific embodiment
[0020] according to some aspect, the invention provides a kind of device, this device comprises microwave kiln, produces uniform High-Power Microwave field in the kiln.This kiln can comprise auxiliary material or so-called base element.Base element is set in the kiln chamber near the position of wanting the ceramic body or the base substrate of sintering.Pedestal roughly can absorb microwave energy under the room temperature, rises promptly by Fast Heating so apply microwave energy from the beginning.This base element is to the ceramic body emitted radiation warm of wanting sintering, and this ceramic body raises DIE Temperature by absorbing the radiant heat that pedestal sends.In case after ceramic body was heated to uniform temperature, this temperature often was called as coupling temperature (T
c), ceramic body just can be heated by microwave energy in the chamber.Adopt certain way control microwave field and power, the thermograde in the ceramic body of sintering is reduced as far as possible.Can adopt suitable temperature measuring apparatus such as pyrometer accurately to measure temperature.In the kiln of design, not only want the interior temperature difference of the base substrate of sintering less, and can be shortened the whole process time greatly according to the present invention.For example, utilize the operated process time of device of the present invention can about 1 hour or less than 1 hour sintering period in obtain the sintered ceramic spare of high compaction.And according to the present invention the physical property of the base substrate of sintering is also identical with base substrate with the conventional art sintering.
[0021] exemplary device 10 formed in accordance with the principles of the present invention as shown in Figure 1.Among the figure, device 10 comprises applicator 12.This applicator 12 can have any suitable geometry or size, can utilize any suitable material to make.According to some embodiment of the present invention, applicator 12 is cylindric or tubulose, is made by stainless steel.
[0022] according to an embodiment, applicator 12 has microwave heating chamber 14.This heating chamber 14 also can adopt any suitable geometry or size, can make with any suitable material.According to some aspect, heating chamber 14 is microwave heating chambers of single mode form, and its inside can produce uniform standing wave.
[0023] heating chamber 14 preferably contains suitable thermal insulation structure 16.The effect of this thermal insulation structure is the efficient that improves microwave heating process, prevents the heat excessive loss.Thermal insulation structure 16 can adopt any suitable form, and can be with any suitable material manufacturing.In this, according to some embodiment, thermal insulation structure 16 can not made with the material of contained microwave energy coupling in the normal sintering period heating chamber by one or more.According to an optional embodiment, thermal insulation structure is formed by a plurality of rings that heat insulator 18 constitutes.Heat insulator can be made by alumina material.
[0024] according to more on the one hand, one or more pedestals 20 can be set in thermal insulation structure 16.As previously mentioned, one or more pedestals 20 can absorb down microwave energy in lower temperature (as room temperature), so promptly be heated rapidly at the beginning from the microwave sintering cycle.The radiant heat that described one or more pedestal 20 produces is used to raise near the temperature of one or more ceramic bodies 22 of these one or more pedestals 20.Like this, the one or more temperature of the ceramic body 22 of sintering of wanting can be increased to the coupling temperature (T that reaches these one or more ceramic bodies 22 by described one or more pedestal 20 radiation emitted heat
c) the point.When this point, contained microwave energy is heated one or more ceramic bodies 22 inside in the chamber 14 in the heating chamber 14.
[0025] described one or more pedestal can adopt any suitable form, geometry or size.In addition, described one or more pedestal 20 can be to be made by any suitable material.According to an illustrational embodiment, pedestal is made by carbofrax material.According to a further illustrational embodiment, this pedestal is the tube of opening or the form of pipe, and described one or more ceramic bodies 22 are placed on and carry out sintering in this pedestal.Pedestal can have the chamber of meeting and the symmetric any opening form of sample.The pedestal of this form should supply microwave penetration by local transparent or local opening, to avoid producing the faraday cup effect.Base material can comprise any can be at room temperature and the material of microwave energy coupling.Pedestal should enough approach, to keep certain process efficiency.If pedestal is too thick, energy can highly accumulate in the pedestal.Base material can comprise any can be at the material of room temperature and microwave energy coupling.Base material also should be able to be resisted thermal runaway phenomenon and take place.Should select the material that under atmosphere up to 1700 ℃ and/or neutrallty condition, to work.Any material that meets these restrictive conditions all is operable.Object lesson comprises many transition metal oxides, as V
2O
5, WO
3, some divalence and trivalent metal oxide, Prosvkite compound such as BaTiO
3, halide such as AgL and CuL, carbide, silicide, doped silicon carbide and amorphous carbon.
[0026] one or more ceramic bodies 22 of sintering of wanting also can adopt any suitable form, have any suitable geometry or size, and can be formed by any suitable ceramic material.According to an embodiment, one or more ceramic body 22 is formed by zirconia, and it includes but not limited to the tetragonal zirconia of stabilized with yttrium oxide.According to further embodiment, one or more ceramic bodies 2 of sintering can be the forms of tooth goods.Suitable tooth goods include but not limited to: veneer, inlay (inlay), onlay (onlay), hat, part hat, bridge, fixed bridge, Maryland fixed bridge (Maryland bridge), implant abutment or tooth hole planting body, or support.According to further embodiment, the tooth goods can comprise the tooth body that is shaped or polishes by the auxiliary shaping technique of CAD/CAM.
[0027] device 10 further comprises source of microwave energy (or claiming microwave source) 24.Any suitable source of microwave energy 24 is contained in the present invention.According to some embodiment, this source of microwave energy comprises magnetron.The microwave energy that source of microwave energy 24 is launched can be any suitable frequency, is generally 800MHz-30GHz.According to an optional embodiment, the microwave energy that source of microwave energy is launched comprises the wavelength of 2.45GHz, the about 12.2cm of its wavelength.Microwave source 24 can directly be communicated with heating chamber 14.Perhaps, microwave source 24 can link to each other with self adaptation wave guide zone 26, and microwave energy passes this self adaptation wave guide zone with effective and efficient manner from microwave source 24 and enters heating chamber 14.Before self adaptation wave guide zone 26 can enter heating chamber 14 at the microwave that microwave source 24 is launched, strengthen the effect of microwave, and make it even.
[0028] in the microwave sintering process, the temperature in the heating chamber 14 can be by any suitable temperature measuring apparatus control.According to an embodiment, temperature measuring apparatus comprises pyrometer 28.According to further embodiment, pyrometer 28 comprises leucoscope.Pyrometer 28 can directly be communicated with heating chamber 14.Perhaps, glass fibre, waveguide or window 30 can provide necessary transmission between pyrometer and heating chamber 14.
[0029] device 10 can further comprise position adjusting mechanism 32 alternatively.According to an embodiment, position adjusting mechanism 32 is used for making platform 32 to move alternatively, and the platform top is provided with thermal insulation structure 16, pedestal 20 and ceramic body 22 along four-headed arrow indicated direction among Fig. 1.This position adjusting mechanism can accurately be arranged on sample or ceramic body 22 on the ad-hoc location in the heating chamber 14, thereby makes microwave at the some bump ceramic body 22 consistent with its wavelength peak swing.This layout can promote ceramic body 22 to absorb microwave energy to greatest extent.Any suitable technique that optimum position in the heating chamber 14 can utilize those skilled in the art to be familiar with is determined by the scale of device 10.For example, can determine the microwave energy output/absorption of each difference in the heating chamber 14.Based on these determination datas, and, can determine the optimum position of ceramic body 22 by some computings.
[0030], the present invention relates to utilize the method or the technology of microwave energy sintered ceramic body according to others.In short, by operating method of the present invention, can control microwave field and microwave power in a certain way, thereby thermograde is dropped to minimum.According to the present invention, one or more ceramic bodies can (be equivalent to environmental condition) and carry out sintering in not having the environment of pressure.Compare with the conventional sintering technology, can be exposed in the lower temperature according to the ceramic body of principle sintering of the present invention.In addition, to be less than the conventional sintering technology far away according to the used time of the sintering method of operate of the present invention.For example, traditional sintering technology needs 6-8 hour, and the sintering technology that carries out according to principle of the present invention can only need 1 hour or less than 1 hour.And, can form the ceramic material of high compaction according to method of the invention process.According to some embodiment, has about 99% solid density or higher with the ceramic material of sintering of the present invention.
[0031] according to an embodiment, comprises: a device with one or more features of said apparatus 10 is provided according to method of operating of the present invention; One or more ceramic bodies are placed on the position of close pedestal; Microwave is introduced in the heating chamber with heating base, then this pedestal by radiant heat heating ceramic body until the coupling temperature that reaches ceramic body, after reaching the coupling temperature, ceramic body is being heated to sufficiently high temperature in the sufficiently long time under the microwave energy effect, thereby make ceramic body densified.
[0032] can make the ceramic body heating by any proper speed.According to some embodiment, ceramic body can be heated to about 700-750 ℃ coupling temperature T in 1 minute
c, being heated to sintering temperature by the control rate of 50 ° of K-200 ° of K of per minute from 750 ℃ then, the excessive or thermal runaway phenomenon of heating appears therebetween.According to an optional embodiment, reach the coupling temperature after, ceramic body by 100 ° K-200 ° K/ minute, especially 140 ° of speed of K/ minute are heated.
[0033] utilize method of the present invention ceramic material can be heated to any suitable maximum temperature.For example, ceramic body can be heated to about 700-1700 ℃ maximum temperature.According to an optional embodiment, ceramic body is heated to about 1400-1500 ℃ maximum temperature.
[0034] according to technology of the present invention, ceramic body can be any suitable a period of time in the time of staying of maximum temperature.For instance, ceramic body can about 20-40 minute in time of staying of maximum temperature.According to an optional embodiment, ceramic body about 30 minutes in the time of staying of maximum temperature.
[0035], comprises the cooling stage that can carry out with any proper speed according to principle of the invention method of operating according to others.According to an illustrational non-limitative example, ceramic body can be with about 40-150 ° K/ minute speed cooling.According to another illustrational example, ceramic body begins to cool down from maximum temperature by about 50 ° of speed of K/ minute.
[0036] according to others, can in a special time period, perhaps before reaching the specific objective temperature, cooling velocity above-mentioned be controlled, afterwards, under noiseless situation, continue cooling.For instance, can ceramic body be cooled to about 500 ℃ by any speed above-mentioned.
[0037] as previously mentioned, the ceramic body according to technology sintering of the present invention can reach quite high solid density.For example, according to the ceramic body of technology sintering of the present invention can reach its solid density at least about 99%.
[0038] more as mentioned above, compare traditional sintering technology, the needed time of sintering method of the present invention and technology is greatly shortened.For instance, by method of the present invention, can about 1 hour or less than 1 hour time in ceramic body be sintered to its solid density about 99% or higher.
[0039] sintering method of the present invention and technology can be applied in the ceramic body of many types.According to an optional embodiment, ceramic body to the small part of sintering to form by zirconia.According to another optional embodiment, zirconia comprises the YTZ zirconia.According to an optional embodiment again, the zirconia body can adopt any suitable form or shape.According to an optional embodiment, this ceramic body comprises the tooth goods.Suitable tooth goods include but not limited to veneer, inlay, onlay, hat, part hat, bridge, fixed bridge, Maryland fixed bridge (Maryland bridge), implant abutment or tooth hole planting body, or support.
[0040] sintering method according to principle of the invention operation may further include one or more ceramic body localization step in the chamber that relate to, with ceramic body is placed on microwave cavity in the peak swing consistent location of contained microwave.
[0041] microwave sintering technology of the present invention can randomly utilize one or more pedestals to produce the radiant heat that the ceramic body temperature is increased to the coupling temperature.Can use foregoing any suitable base element.According to an optional embodiment, pedestal comprises the tubular or the tubular part of the opening that is formed by carborundum.According to another embodiment, can utilize the raise temperature of ceramic body of other alternative methods.For example, can utilize the raise temperature of ceramic body of the resistive element that comprises in the kiln chamber, until the coupling temperature that reaches ceramic body.
[0042] according to other optional embodiment, the ceramic body of sintering can be any form that is shaped by auxiliary shaping of CAD/CAM or grinding technology.
Embodiment
[0043] the zirconia porous piece with preliminary sintering is polished into the zirconia bridge bracket, in single mode sintering kiln prototype, carries out sintering under the maximum temperature of 1400 ° of KC then.Again specifically, material therefor is Y-PSC (ZirCAD, Ivoclar Vivadent, FL-9494 Schaan).The machine of polishing zirconia porous piece is commercial CAD/CAM tooth sander (CEREC InLab, Sirona, 0-64625 Bensheim).Piece after the polishing or support are put in the carborundum tube as pedestal.The firing rate of using be 140 ° K/ minute.When maximum temperature, stopped about 30 minutes, and with 50 ° of cooling control rates of K/ minute temperature was cooled to 500 ℃ from 1400 ℃ afterwards.52 minutes consuming time of whole cycle.The sintering situation of this test as shown in Figure 2.
[0044] after measured, the density of resulting sintering support is 6.04g/cm
3Or its solid density 99.2%.With the micro-structural of the zirconia support behind the sintering with according to conventional art 1500 ℃ or in about 6 hours of cycle the micro-structural of the similar ceramic body of sintering compare.In this example, the displaing micro picture of the micro-structural of sintering support as shown in Figure 3.The displaing micro picture of reference micro-structural relatively as shown in Figure 4.Fig. 3 and microstructure shown in Figure 4 are compared discovery, do not have significant difference between the microwave sintering device of utilization this embodiment and the micro-structural that technology is produced according to the present invention.
[0045] used device, method and technology can provide alternatively with the next item down or multiple advantages among one or more embodiment of the present invention:
Selectively the ceramic body of wanting sintering is heated, rather than the heating container body at these ceramic body places is heated;
Drop to the time of sintering period the shortest.
The energy that is consumed during sintering period is dropped to minimum;
To add thermal inertia drop to minimum (that is, and close the microwave radiation after, heat proof material has the limited thermal inertia during except pedestal and lower temperature (500 ℃), heating process almost stops at once); And
Sintered ceramic body (be single mode, promptly utilize device, method and the technology in single mold microwave chamber) in the microwave cavity of microwave field is uniformly contained very in inside.
[0046] all the expression quantity used in this specification or the numeral of parameter are interpreted as all being modified by " pact " in addition in all cases.Though number range mentioned in this article and parameter (relative broad range of the theme that this paper proposes) are approximations, these numerical value are still represented as far as possible accurately.For example, any numerical value all might exist some constant error (representing with the relevant standard deviation of measuring technique separately) or rounding error and inaccurate.
[0047] though invention has been described in conjunction with the preferred embodiments, but those skilled in the art should be understood that, under the prerequisite that does not break away from the spirit and scope of the present invention that claims limit, can carry out increase, deletion, modification and the replacement specifically do not mentioned here to the present invention.
Claims (33)
1. ceramic body sintering equipment, this device comprises:
Applicator with single mold microwave heating chamber;
Be located at the thermal insulation structure in the described heating chamber;
The pedestal that be located in the described thermal insulation structure, its microwave coupling temperature is lower than ceramic body;
Be placed on ceramic body near described base position;
Magnetron; And
Temperature measuring apparatus.
2. device according to claim 1, wherein, described ceramic body contains zirconia.
3. device according to claim 1, wherein, described ceramic body comprises the tooth goods.
4. device according to claim 3, wherein, described tooth goods comprise following one or more goods: veneer, inlay, onlay, hat, part hat, bridge, fixed bridge, Maryland fixed bridge, implant abutment or tooth hole planting body, and support.
5. device according to claim 1, wherein, described heating chamber in a tubular form.
6. device according to claim 1, wherein, described heating chamber has portion within it and produces even standing wave and make the microwave amplitude reach maximum structure and size.
7. device according to claim 1, wherein, described applicator is made by stainless steel.
8. device according to claim 1, wherein, described thermal insulation structure is made by aluminium oxide.
9. device according to claim 1, wherein, described pedestal is tubular, and described ceramic body is positioned at the inside of this tubular pedestal.
10. device according to claim 1, wherein, described pedestal is by carborundum, V
2O
5, WO
3, BaTiO
3, AgL, CuL, carbide or amorphous carbon makes.
11. device according to claim 1, wherein, described magnetron produces the microwave of the about 2.45GHz of frequency.
12. device according to claim 11, wherein, described magnetron links to each other with wave guide zone, and this wave guide zone is communicated with described heating chamber.
13. device according to claim 1, wherein, described temperature measuring apparatus is a pyrometer.
14. device according to claim 1, it further comprises the governor motion that ceramic body can be moved on to desired location in the described heating chamber.
15. the sintering method of a ceramic body, this method comprises:
A kind of device is provided, and it comprises: the applicator with single mold microwave heating chamber; Be located at the thermal insulation structure in this heating chamber; The pedestal that be located in this thermal insulation structure, microwave coupling temperature is lower than ceramic body; Magnetron; And temperature measuring apparatus;
Ceramic body is placed on the position of close described pedestal;
Microwave is introduced in the chamber to heat described pedestal, described pedestal heats ceramic body until the coupling temperature that reaches ceramic body by the radiation heating mode, after reaching this temperature, ceramic body is heated to sufficiently high temperature in the sufficiently long time under microwave action, thereby make ceramic body densified.
16. method according to claim 15 wherein, after ceramic body reaches described coupling temperature, is heated to maximum temperature by 50-150 ° of K/ minute speed with described ceramic body.
17. method according to claim 16, wherein, described speed be about 140 ° K/ minute.
18. method according to claim 15, wherein, described ceramic body is heated to about 1200-1700 ℃ maximum temperature.
19. method according to claim 18, wherein, described ceramic body is heated to about 1400 ℃ maximum temperature.
20. method according to claim 18, wherein, described ceramic body is about 20-40 minute in the time of staying of maximum temperature.
21. method according to claim 18, wherein, described ceramic body is about 30 minutes in the time of staying of maximum temperature.
22. method according to claim 18, wherein, described ceramic body begins to cool down from maximum temperature with about 40-150 ° K/ minute speed.
23. method according to claim 18, wherein, described ceramic body begins to cool down from maximum temperature with about 50 ° of speed of K/ minute.
24. method according to claim 18, wherein, described ceramic body is cooled to about 500 ℃ by certain speed.
25. method according to claim 15, wherein, with described ceramic body be sintered to its solid density at least about 99%.
26. method according to claim 15, wherein, the described whole sintering process time spent was less than 1 hour.
27. method according to claim 15, wherein, described ceramic body contains zirconia.
28. a method that forms the tooth goods, this method comprises: ceramic body is shaped; Method according to claim 15 is carried out sintering to ceramic body.
29. method according to claim 28, wherein, described ceramic body is configured as the form of following one or more goods: veneer, inlay, onlay, hat, part hat, bridge, fixed bridge, Maryland fixed bridge, implant abutment or tooth hole planting body, and support.
30. method according to claim 29, it comprises that further making described heating chamber have portion within it produces even standing wave and make the microwave amplitude reach maximum structure and size.
31. method according to claim 30, it further comprises the regulation and control site of described ceramic body in described heating chamber, thus make described ceramic body be in heating chamber in the site of position consistency of peak swing of contained even microwave.
32. method according to claim 31, wherein, described pedestal is the tubular part that is formed by carborundum.
33. method according to claim 32, wherein, described ceramic body is shaped by the auxiliary shaping technique of CAD/CAM.
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| CN200810134298A CN101644531A (en) | 2008-08-04 | 2008-08-04 | Ceramic densifying method and device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601373A (en) * | 2012-04-01 | 2012-07-25 | 中国矿业大学 | Method and device for preparing composite ceramic layer surface strengthened aluminum alloy material |
| CN108474621A (en) * | 2015-12-16 | 2018-08-31 | 3M创新有限公司 | The method of micro-wave oven and sintering |
| CN108751986A (en) * | 2018-06-29 | 2018-11-06 | 安徽省徽腾智能交通科技有限公司 | A kind of device using electromagnetic wave sintered zirconia-yttrium |
| CN109987969A (en) * | 2019-04-29 | 2019-07-09 | 成都贝施美生物科技有限公司 | A kind of rapid soaking zirconium oxide artificial tooth dyeing liquor |
-
2008
- 2008-08-04 CN CN200810134298A patent/CN101644531A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601373A (en) * | 2012-04-01 | 2012-07-25 | 中国矿业大学 | Method and device for preparing composite ceramic layer surface strengthened aluminum alloy material |
| CN102601373B (en) * | 2012-04-01 | 2014-04-16 | 中国矿业大学 | Method and device for preparing composite ceramic layer surface strengthened aluminum alloy material |
| CN108474621A (en) * | 2015-12-16 | 2018-08-31 | 3M创新有限公司 | The method of micro-wave oven and sintering |
| US11435142B2 (en) | 2015-12-16 | 2022-09-06 | 3M Innovative Properties Company | Microwave furnace and a method of sintering |
| CN108751986A (en) * | 2018-06-29 | 2018-11-06 | 安徽省徽腾智能交通科技有限公司 | A kind of device using electromagnetic wave sintered zirconia-yttrium |
| CN108751986B (en) * | 2018-06-29 | 2021-02-02 | 安徽省徽腾智能交通科技有限公司 | Device for sintering zirconia-yttria ceramic by using electromagnetic wave |
| CN109987969A (en) * | 2019-04-29 | 2019-07-09 | 成都贝施美生物科技有限公司 | A kind of rapid soaking zirconium oxide artificial tooth dyeing liquor |
| CN109987969B (en) * | 2019-04-29 | 2021-07-06 | 成都贝施美生物科技有限公司 | Rapid zirconium oxide soaking denture staining solution |
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