CN204718379U - Ultrasonic wave vibration activation assisted microwave synthesis sintering furnace - Google Patents
Ultrasonic wave vibration activation assisted microwave synthesis sintering furnace Download PDFInfo
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- CN204718379U CN204718379U CN201520179286.4U CN201520179286U CN204718379U CN 204718379 U CN204718379 U CN 204718379U CN 201520179286 U CN201520179286 U CN 201520179286U CN 204718379 U CN204718379 U CN 204718379U
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Abstract
The purpose of this utility model is to the actual demand of sintering technology and the advantage of ultrasonic technology for new material research and development, devise a kind of by microwave source, magnetron, waveguide, draw ripple crucible or common high-temperature crucibles, ultrasonic transformer, ultrasonic transformer bracing frame, supersonic generator, the microwave agglomerating furnace of the ultrasonic wave vibration activation assisted sintering that ultrasonic transducer etc. are formed.The signal of telecommunication that supersonic generator produces converts ultrasonic vibration to by ultrasonic transducer, ultrasonic vibration by ultrasonic transformer, crucible be delivered to draw in ripple crucible or common high-temperature crucibles waiting burn sample, make to wait that burn sample is in ultrasonic vibration state in microwave sintering process, under microwave irradiation effect, wait the corpuscle vibration at high speed at microwave sintering temperature burning sample, promote crystal grain Quick uniform nucleation and growth process or the moieties uniform melt Fast Filling space for the treatment of burning sample.After the utility model can make bulk sample sinter, micro-structural is more even, fine and close, and sample is more excellent in microstructure.
Description
Technical field
The utility model relates to a kind of microwave agglomerating furnace, particularly relates to a kind of microwave agglomerating furnace by inorganic material such as ultrasonic wave vibration activation assisted sintering potteries.
Background technology
Sintering is the core link of the inorganic material preparation process such as pottery.In sintering process, material forms exclusive crystalline structure, particle size, pattern and the Physical and chemical characteristics such as dislocation, defect, thus makes material possess distinctive performance.The heating of conventional sintering stove relies on heater that heat energy is passed to heating object by convection current, conduction or radiation mode and is made it reach a certain temperature, and heat transmits from outside to inside, and sintering time is long, is also difficult to obtain thin crystalline substance.Microwave sintering is a kind of new method of material sintering process, it has that programming rate is fast, energy utilization rate is high, the efficiency of heating surface is high and the feature such as safety and sanitation are pollution-free, and uniformity and the yield rate of product can be improved, improve the microstructure and properties being sintered material.The distinctive uniform heating pattern of microwave, makes material internal thermal stress reduce, thus reduces cracking, distortion tendency.Between Short-Time Microwave, sintering makes the crystal grain of sintered article not easily grow up, and easily obtain uniform fine-grained microstructure, internal void is few, makes sintered article have better ductility and toughness.
Ultrasonic wave is the sound wave of a kind of frequency higher than 20kHz, have that good directionality, penetration capacity are strong, the feature of concentration of energy, unique physical phenomenon can be caused in propagation medium, as produced mechanical effect, fuel factor, cavitation effect and chemical effect during propagation.Current ultrasonic technology is existing application in the chemical preparation, processing procedure of wet chemistry synthesis material.Patent of invention " ultrasonic-assisted densification device " (publication number CN 101684520A) makes to reach between pressed compact particle to closely cooperate by loading ultrasonic wave dither, thus makes the pressed density of pressed compact improve and be evenly distributed.Patent of invention " a kind of ultrasonic vibration activation auxiliary resistance stove " (publication number CN 104180655 A) promotes the sintering of sintered article in electrical resistance sintering stove by loading ultrasonic wave vibration activation, there is prevention grain growth, goods density be high, effect that porosity is low.Ultrasonic wave has distinctive mechanical effect, fuel factor and cavitation effect, adopts ultrasonic technology activation assisted sintering can refinement sintered article tissue, further reduction sintered article porosity further, but has no its application in microwave sintering at present.
Utility model content
The purpose of this utility model is for the restriction of existing new material research and development to the actual demand of extraordinary sintering technology, the advantage of ultrasonic technology and microwave agglomerating furnace, devise a kind of ultrasonic wave vibration activation assisted microwave synthesis sintering furnace, crystal growing process prepared by the microwave sintering controlling New Inorganic Materials particularly inorganic nano material is to improve its performance, and it mainly comprises following structure:
A kind of ultrasonic wave vibration activation assisted microwave synthesis sintering furnace, comprise furnace shell and be built in the burner hearth of furnace shell, microwave heating system, atmosphere system and ultrasonic vibration activation assisted sintering system, microwave heating system comprises microwave source, magnetron, waveguide, what absorb microwave draws ripple crucible or common high-temperature crucibles, microwave frequency can from 300MHz to 300GHz, ultrasonic vibration activation assisted sintering system comprises ultrasonic transformer, ultrasonic transformer bracing frame, supersonic generator, ultrasonic transducer, common high-temperature crucibles or absorb microwave draw ripple crucible, it is characterized in that, magnetron is arranged on described waveguide, waveguide is arranged on furnace shell, draw ripple crucible or common high-temperature crucibles is arranged in the middle part of burner hearth, wait burn sample be positioned at absorb microwave draw ripple crucible or common high-temperature crucibles, draw ripple crucible or common high-temperature crucibles is connected with ultrasonic transformer, the ultrasonic transformer other end is connected with the ultrasonic transducer be positioned at outside furnace shell, ultrasonic transformer is fixed by ultrasonic transformer bracing frame, ultrasonic transformer bracing frame passes furnace shell by aperture, ultrasonic transformer external diameter is slightly less than ultrasonic transformer bracing frame internal diameter, ultrasonic transformer can move freely along the diameter of axle in ultrasonic transformer bracing frame, the aperture by ultrasonic transformer bracing frame is had bottom furnace shell, furnace shell top and draw ripple crucible top and have the thermometer hole being carried out temperature monitoring by infrared radiation thermometer, the center line of two thermometer holes and wait that the center line burning sample is in same vertical line.
Described ultrasonic wave vibration activation assisted microwave synthesis sintering furnace, it is characterized in that, wait that burning sample is placed in crucible, what sinter easy absorption microwave uses common high-temperature crucibles in time burning sample, the bottom periphery of common high-temperature crucibles has the edge, the end of a upwards about 0.3 ~ 1cm, sintering not easily absorb microwave wait burn sample time with drawing ripple crucible, draw ripple crucible top center and have thermometer hole, draw ripple crucible formed draw Wave heating chamber.
Described ultrasonic wave vibration activation assisted microwave synthesis sintering furnace, it is characterized in that, ultrasonic transducer, supersonic generator and ultrasonic transformer, ultrasonic transformer bracing frame, common high-temperature crucibles or draw ripple crucible and form ultrasonic vibration activating apparatus, ultrasonic transformer bracing frame is installed by burner hearth aperture and is fixed, the operating temperature range of ultrasonic vibration activation assisted microwave synthesis sintering furnace is 600 DEG C ~ 1800 DEG C, and maximum operating temperature is determined by the operating temperature ratings of microwave agglomerating furnace and the maximum operation (service) temperature of crucible, bracing frame and ultrasonic transformer.
Described ultrasonic wave vibration activation assisted microwave synthesis sintering furnace, it is characterized in that, ultrasonic transducer is magnetostrictive transducer or PZT (piezoelectric transducer), operating frequency is 20kHz ~ 100kHz, ultrasonic power and load time are controlled by supersonic generator, supersonic generator produces the signal of telecommunication mated with ultrasonic transducer operating frequency, the signal of telecommunication converts ultrasonic vibration to by ultrasonic transducer, ultrasonic transformer is passed through in ultrasonic vibration, crucible passes to treating in crucible and burns sample, make to wait that burn sample is in ultrasonic vibration state in sintering process, while microwave sintering, wait the corpuscle at high temperature vibration at high speed burning sample, promote to wait that burning sample crystal grain homogeneous nucleation grows up or uniform melt, bulk sample micro-structural is even, fine and close, more excellent in microstructure.
Described ultrasonic wave vibration activation assisted microwave synthesis sintering furnace, it is characterized in that, atmosphere system passes into gas by the blow vent of bottom, and gas is discharged by the exhaust outlet at top, by sealing ventilation mouth, to vacuumize can form certain low vacuum sintering atmosphere at exhaust outlet.
The utility model has following beneficial effect:
(1) grain growth is stoped: because ultrasonic energy makes to wait to burn sample high vibration, increase and wait to burn the contact area between sample particle, accelerate the diffusion of waiting to burn atom between sample particle, promote the carrying out of waiting to burn sample nucleation and sintering or fusion process, promote simultaneously some liquid phases of at high temperature producing faster and better be filled between solid fine grain, effectively increase nucleus quantity.By the cavitation effect of liquid in ultrasonic field, particle can be made to be impacted in the liquid phase and break, can to keep or refinement is sintered the microstructure of material, prevent from waiting to burn the grain growth of sample in sintering process, make the grain refinement of waiting to burn sample, this preparation for nanometer material section has obviously advantage.
(2) goods density is high, porosity is low: the extrudate density sintering out under ultrasonic vibration mechanism is high, is evenly distributed, and between particle, contact area is large, and liquid phase can more fully be filled between solid phase particles, and impel gas to discharge faster, porosity is low.
Accompanying drawing explanation
Accompanying drawing 1 draws ripple crucible schematic diagram for the utility model adopts;
Accompanying drawing 2 is common high-temperature crucibles schematic diagram for the utility model adopts;
Number in the figure: 1-furnace shell, 2-magnetron, 3-waits to burn sample, and 4-draws ripple crucible, 5-ultrasonic transformer, 6-ultrasonic transformer bracing frame, 7-ultrasonic transducer, 8-supersonic generator, 9-infrared measurement of temperature hole, the common high-temperature crucibles of 10-, 11-ventilation controls mouth, 12-gas exhaust inspecting mouth.
Detailed description of the invention
The utility model provides a kind of ultrasonic wave vibration activation assisted microwave synthesis sintering furnace, illustrates to be described further the utility model with detailed description of the invention below by accompanying drawing.
Embodiment 1:
Ripple crucible schematic diagram is drawn as Fig. 1 ultrasonic wave vibration activation assisted microwave synthesis sintering furnace adopts, the microwave frequency of the ultrasonic wave vibration activation assisted microwave synthesis sintering furnace that the utility model provides is 2.45GHz, the barium strontium titanate piezoelectric ceramics sample 3 not inhaling ripple or wave absorbtion difference is placed in silicon nitride and draws in ripple crucible 4, furnace shell top and silicon nitride are drawn ripple crucible top and have the thermometer hole 9 being carried out temperature monitoring by infrared radiation thermometer, the center line of two thermometer holes and wait that the center line burning sample is in same vertical line, silicon nitride draws the formation of ripple crucible and draws Wave heating chamber, magnetron 2 is by furnace shell, heating using microwave silicon nitride draws ripple crucible.Ultrasonic vibration activation assisted sintering system is bottom installation form, the aluminium oxide ceramics ultrasonic transformer bracing frame 6 of hollow circuit cylinder ring-type is through the aperture bottom furnace shell 1, aluminium oxide ceramics ultrasonic transformer 5 is through ultrasonic transformer bracing frame 6, the alumina ceramic crucible 4 that bottom has corresponding internal thread is received by external screw thread in ultrasonic transformer 5 one end in burner hearth, threadedly connect the ultrasonic transducer 7 of operating frequency 20kHz in the outer one end of the burner hearth of ultrasonic transformer 5, ultrasonic transducer 7 is connected by electrical wiring on supersonic generator 8.The operating frequency of supersonic generator 8 is set as 20kHz, and ultrasonic vibration power and load time are controlled by supersonic generator 8.Load ultrasonic vibration at the intensification of heating using microwave, insulation or temperature-fall period, realize ultrasonic vibration activation assisted sintering.Control mouth 11 by ventilation and pass into air, discharge air by gas exhaust inspecting mouth 12.In the present embodiment, most high sintering temperature controls at 900 DEG C, is incubated 0.5 hour, can realizes the Fast Sintering of barium strontium titanate piezoelectric ceramics.
Embodiment 2:
As Fig. 2 ultrasonic wave vibration activation assisted microwave synthesis sintering furnace adopts common high-temperature crucibles schematic diagram, the microwave frequency of the ultrasonic wave vibration activation assisted microwave synthesis sintering furnace that the utility model provides is 2.45GHz, the MnZn ferrite block 3 that wave absorbtion is good is placed in common high-temperature crucibles 10, furnace shell top has the thermometer hole 9 being carried out temperature monitoring by infrared radiation thermometer, the center line of thermometer hole 9 and wait that the center line burning sample is in same vertical line, magnetron 2 is by furnace shell, and heating using microwave is inhaled ripple and waited to burn sample.Ultrasonic vibration activation assisted sintering system is bottom installation form, the aluminium oxide ceramics ultrasonic transformer bracing frame 6 of hollow circuit cylinder ring-type is through the aperture bottom furnace shell 1, aluminium oxide ceramics ultrasonic transformer 5 is through ultrasonic transformer bracing frame 6, the alumina ceramic crucible 4 that bottom has corresponding internal thread is received by external screw thread in ultrasonic transformer 5 one end in burner hearth, threadedly connect the ultrasonic transducer 7 of operating frequency 20kHz in the outer one end of the burner hearth of ultrasonic transformer 5, ultrasonic transducer 7 is connected by electrical wiring on supersonic generator 8.The operating frequency of supersonic generator 8 is set as 20kHz, and ultrasonic vibration power and load time are controlled by supersonic generator 8.Load ultrasonic vibration at the intensification of heating using microwave, insulation or temperature-fall period, realize the ultrasonic vibration activation assisted sintering of ferrite block.O
2atmosphere controls mouth 11 by ventilation and introduces, and is discharged by gas exhaust inspecting mouth 12.Started to pass into the O by 5% before microwave sintering 3-15 minute
2, the N of 95%
2the mist that (volume content) is formed, and after remaining to cooling, realize controlled oxygen atmosphere sintering.In the present embodiment, most high sintering temperature controls at 950 DEG C, is incubated 0.5 hour, can realizes the fast densified sintering of MnZn ferrite block.
Claims (5)
1. a ultrasonic wave vibration activation assisted microwave synthesis sintering furnace, comprise furnace shell and be built in the burner hearth of furnace shell, microwave heating system, atmosphere system and ultrasonic vibration activation assisted sintering system, microwave heating system comprises microwave source, magnetron, waveguide, what absorb microwave draws ripple crucible or common high-temperature crucibles, microwave frequency can from 300MHz to 300GHz, ultrasonic vibration activation assisted sintering system comprises ultrasonic transformer, ultrasonic transformer bracing frame, supersonic generator, ultrasonic transducer, common high-temperature crucibles or absorb microwave draw ripple crucible, it is characterized in that, magnetron is arranged on described waveguide, waveguide is arranged on furnace shell, draw ripple crucible or common high-temperature crucibles is arranged in the middle part of burner hearth, wait burn sample be positioned at absorb microwave draw ripple crucible or common high-temperature crucibles, draw ripple crucible or common high-temperature crucibles is connected with ultrasonic transformer, the ultrasonic transformer other end is connected with the ultrasonic transducer be positioned at outside furnace shell, ultrasonic transformer is fixed by ultrasonic transformer bracing frame, ultrasonic transformer bracing frame passes furnace shell by aperture, ultrasonic transformer external diameter is slightly less than ultrasonic transformer bracing frame internal diameter, ultrasonic transformer can move freely along the diameter of axle in ultrasonic transformer bracing frame, the aperture by ultrasonic transformer bracing frame is had bottom furnace shell, furnace shell top and draw ripple crucible top and have the thermometer hole being carried out temperature monitoring by infrared radiation thermometer, the center line of two thermometer holes and wait that the center line burning sample is in same vertical line.
2. ultrasonic wave vibration activation assisted microwave synthesis sintering furnace according to claim 1, it is characterized in that, wait that burning sample is placed in crucible, what sinter easy absorption microwave uses common high-temperature crucibles in time burning sample, the bottom periphery of common high-temperature crucibles has the edge, the end of a upwards about 0.3 ~ 1cm, sintering not easily absorb microwave wait burn sample time with drawing ripple crucible, draw ripple crucible top center and have thermometer hole, draw ripple crucible formed draw Wave heating chamber.
3. ultrasonic wave vibration activation assisted microwave synthesis sintering furnace according to claim 1, it is characterized in that, ultrasonic transducer, supersonic generator and ultrasonic transformer, ultrasonic transformer bracing frame, common high-temperature crucibles or draw ripple crucible and form ultrasonic vibration activating apparatus, ultrasonic transformer bracing frame is installed by burner hearth aperture and is fixed, the operating temperature range of ultrasonic vibration activation assisted microwave synthesis sintering furnace is 600 DEG C ~ 1800 DEG C, and maximum operating temperature is determined by the operating temperature ratings of microwave agglomerating furnace and the maximum operation (service) temperature of crucible, bracing frame and ultrasonic transformer.
4. ultrasonic wave vibration activation assisted microwave synthesis sintering furnace according to claim 1, it is characterized in that, ultrasonic transducer is magnetostrictive transducer or PZT (piezoelectric transducer), operating frequency is 20kHz ~ 100kHz, ultrasonic power and load time are controlled by supersonic generator, supersonic generator produces the signal of telecommunication mated with ultrasonic transducer operating frequency, the signal of telecommunication converts ultrasonic vibration to by ultrasonic transducer, ultrasonic transformer is passed through in ultrasonic vibration, crucible passes to treating in crucible and burns sample, make to wait that burn sample is in ultrasonic vibration state in sintering process, while microwave sintering, wait the corpuscle at high temperature vibration at high speed burning sample, promote to wait that burning sample crystal grain homogeneous nucleation grows up or uniform melt, bulk sample micro-structural is even, fine and close, more excellent in microstructure.
5. ultrasonic wave vibration activation assisted microwave synthesis sintering furnace according to claim 1, it is characterized in that, atmosphere system passes into gas by the blow vent of bottom, and gas is discharged by the exhaust outlet at top, by sealing ventilation mouth, to vacuumize can form certain low vacuum sintering atmosphere at exhaust outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201520179286.4U CN204718379U (en) | 2015-03-20 | 2015-03-20 | Ultrasonic wave vibration activation assisted microwave synthesis sintering furnace |
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| CN201520179286.4U CN204718379U (en) | 2015-03-20 | 2015-03-20 | Ultrasonic wave vibration activation assisted microwave synthesis sintering furnace |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104729294A (en) * | 2015-03-20 | 2015-06-24 | 重庆科技学院 | Ultrasonic vibration activation assisted microwave sintering furnace |
| TWI548848B (en) * | 2015-11-20 | 2016-09-11 | 財團法人金屬工業研究發展中心 | Microwave heating and drying device |
| CN109772670A (en) * | 2019-02-13 | 2019-05-21 | 方兵 | Ultrasonic variable amplitude bar |
| CN112759422A (en) * | 2021-02-01 | 2021-05-07 | 云南省第一人民医院 | Method for preparing dental zirconia-veneer porcelain with high-bonding-force interface |
| CN113444901A (en) * | 2021-06-28 | 2021-09-28 | 哈尔滨工业大学 | Ultrasonic-assisted fusing device and method for vacuum ultrahigh-temperature refractory active material |
-
2015
- 2015-03-20 CN CN201520179286.4U patent/CN204718379U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104729294A (en) * | 2015-03-20 | 2015-06-24 | 重庆科技学院 | Ultrasonic vibration activation assisted microwave sintering furnace |
| TWI548848B (en) * | 2015-11-20 | 2016-09-11 | 財團法人金屬工業研究發展中心 | Microwave heating and drying device |
| CN109772670A (en) * | 2019-02-13 | 2019-05-21 | 方兵 | Ultrasonic variable amplitude bar |
| CN109772670B (en) * | 2019-02-13 | 2020-08-28 | 中国海洋大学 | Ultrasonic amplitude transformer |
| CN112759422A (en) * | 2021-02-01 | 2021-05-07 | 云南省第一人民医院 | Method for preparing dental zirconia-veneer porcelain with high-bonding-force interface |
| CN112759422B (en) * | 2021-02-01 | 2022-12-27 | 云南省第一人民医院 | Method for preparing dental zirconia-veneer porcelain with high-bonding-force interface |
| CN113444901A (en) * | 2021-06-28 | 2021-09-28 | 哈尔滨工业大学 | Ultrasonic-assisted fusing device and method for vacuum ultrahigh-temperature refractory active material |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151021 Termination date: 20180320 |
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| CF01 | Termination of patent right due to non-payment of annual fee |