CN2715885Y - Gradient strong magnetic field unidirectional solidification crystallization apparatus - Google Patents
Gradient strong magnetic field unidirectional solidification crystallization apparatus Download PDFInfo
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- CN2715885Y CN2715885Y CN 200420037333 CN200420037333U CN2715885Y CN 2715885 Y CN2715885 Y CN 2715885Y CN 200420037333 CN200420037333 CN 200420037333 CN 200420037333 U CN200420037333 U CN 200420037333U CN 2715885 Y CN2715885 Y CN 2715885Y
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Abstract
The utility model discloses a gradient strong magnetic field unidirectional solidification crystallization apparatus, belonging to the crystal preparative technical field of crystals which are grown under the magnetic field control. The utility model comprises a crucible or a mould which is used to hold the material in a melting state, a heating element and a heat-insulating layer which are arranged beside the crucible or the mould, a thermal insulating water jacket, and a superconducting coil. The superconducting coil is arranged in a dewar jar. A cooler which can be admitted with coolant is arranged below the crucible or the mould. A pulling-out device in the lower part of the utility model is provided with a guideway and a platform on the upper side. The cooler on the platform can be made to move forward along the guideway, and to drive the crucible or the mould to move simultaneously by the pulling-out device. The superconducting coil is admitted with a direct current with the highest ampere of 1000A. The magnetic induction B of the produced magnetic field is within the range of 1-40T, and the bz (dbz/dz) value is within the range of 200-3400t<2>/m. The utility model can prepare crystallization crystal material with uniform ingredients and performance.
Description
Technical field
The utility model relates to a kind of strong magnetic field gradient unidirectional solidification crystallization apparatus, belongs to the crystal preparing technology field of magnetic field control crystal growth.
Background technology
Under magnetic field effect, there were some technical defective and deficiencies on the unidirectional method and apparatus that solidifies the grown crystal material in the past, mainly be in the process of unidirectional solidification grown crystal, owing to reasons such as solute reallocation and density difference, be subjected to the effect of gravity, be easy to produce the gathering partially of solute, be segregation, this can cause crystalline material performance and homogenieity thereof to reduce.Thereby, for alleviating this segregation, people once adopted the method for grown crystal in the space microgravity environment or the pipe that falls, but expense costliness at space environment grown crystal material, the grown crystal time is too short in the pipe that falls in addition, therefore be difficult to grow Applied Materials, be necessary to seek a kind of new method and prepare and improve uniform crystalline material.
Summary of the invention
The purpose of this invention is to provide a kind of under strong magnetic field gradient control the device of unidirectional solidification and crystallization.
The purpose of this utility model realizes by following technical proposals.
Strong magnetic field gradient unidirectional solidification crystallization apparatus of the present utility model, include superconducting magnet that superconducting coil is housed, heating element heater, heat-insulation layer, controlled pull unit etc., the central authorities that it is characterized in that this device are provided with a crucible or a model that holds the molten state material, its side is provided with heating element heater, the heating element heater arranged outside has heat-insulation layer, press close to the heat-insulation layer place again and be provided with the insulated water jacket, outermost is provided with superconducting coil, superconducting coil places in the Dewar jar, be provided with the thermal-insulating sealing lid above container crucible or model, the bottom is provided with the heat-insulation and heat-preservation backing plate; In crucible or the model, will form in the molten state material on top and the operating process, between the solidification and crystallization of bottom part, form a solidification and crystallization interface; Be provided with the cooler that can feed cooling agent below crucible or the model; Be provided with guide rail and platform above the pulling off device of device bottom, pulling off device can make the cooler on the platform move forward along guide rail, and drives top crucible or the same moved further of model.
Superconducting coil feeds direct current and is up to 1000A, and the magnetic induction density B in the magnetic field of generation is in the 1-40T scope, and Bz (dBz/dz) is worth at 200-3400T
2In/m the scope.
The utility model designs according to following principle: any material all has magnetic, all produces magnetizing force in strong magnetic field gradient, and its magnetizing force can be expressed as:
Wherein, F-magnetizing force, N/Kg; χ-mass susceptibility; μ
0=4 π * 10
-7Wb/mA; The B-magnetic field intensity, T.Force direction depends on χ (B ) B, can offset gravity when it is opposite with gravity, takes place thereby suppress segregation.Simultaneously, thus strong static magnetic field also can produce reverse Lorentz force to the convection current in the conducting liquid to be suppressed.Existing strong magnetic field gradient can obtain economically for a long time, therefore can carry out the growth of crystalline material and other materials on the ground for a long time, and its expense then reduces greatly.
Superconducting solenoid coil is in superconducting state at low temperatures, feeds the high-intensity magnetic field that produces behind the electric current greater than 1 tesla, and according to the magnetic of crystalline material, sets direction and the size of χ (B ) B, makes it and counteract gravity forces; The solid/liquid interfaces of the crystalline material of desire growth is remained near χ (B ) the B value maximum, pull straight crystalline portion, promptly crystallizablely go out uniform crystalline material.
Advantage of the present invention:
The utility model apparatus structure is simple, be convenient to operate, can prevent segregation and cause the crystal uniformity to reduce and influence the performance of crystalline material, can prepare and improve uniform crystalline material.Device of the present utility model can be realized solidification and crystallization under the microgravity environment on ground, and solute Distribution in the crystallization of control unidirectional solidification is produced the uniform material of composition and performance.
Description of drawings
Fig. 1 is a unidirectional solidification and crystallization apparatus structure schematic diagram under the high-intensity magnetic field of the present utility model.
Fig. 2 is a graph of relation between solidification and crystallization interface and magnetic field parameter Bz (dBz/dz)
The specific embodiment
Now in conjunction with the accompanying drawings and embodiments, the utility model device further is described in after.
Embodiment one:, referring to Fig. 1 and Fig. 2, strong magnetic field gradient unidirectional solidification crystallization apparatus of the present utility model, include the superconducting magnet that superconducting coil is housed, heating element heater, heat-insulation layer, controlled pull unit etc., the central authorities of this device are provided with a crucible or a model 3 that holds molten state material 4, its side is provided with heating element heater 2, heating element heater 2 arranged outside have heat-insulation layer 8, press close to heat-insulation layer 8 places again and be provided with insulated water jacket 5, outermost is provided with superconducting coil 7, superconducting coil 7 places in the Dewar jar 6, be provided with thermal-insulating sealing lid 1 above container crucible or model 3, the bottom is provided with heat-insulation and heat-preservation backing plate 10; In crucible or the model 3, will form in the molten state material 4 on top and the operating process, between the solidification and crystallization part 9 of bottom, form a solidification and crystallization interface 15; Be provided with the cooler 11 that can feed cooling agent below crucible or the model 3; Be provided with guide rail 13 and platform 12 above the pulling off device 14 of device bottom, pulling off device 14 can make the cooler 11 on the platform 12 move forward along guide rail 13, and drives top crucible or model 3 same moved further.
When the superconducting coil in the superconducting magnet is in the low-temperature superconducting attitude, feed direct current, reach as high as 1000A, can produce the above high-intensity magnetic field of 10T, and improve the value of Bz (dBz/dz) as far as possible, and wherein Bz is the axial magnetic induction, dBz/dz is the magnetic field gradient (see figure 2).
In operating process, at first determine solidification and crystallization interface location 15 according to the magnetic and the coagulating property of material, then material 4 in crucible or the model 3 is melted under the heating of heating element heater 2 in no magnetic field and be incubated the enough time, feed electric currents to superconducting coil 7 again, make it to produce predetermined strength magnetic field; Secondly, the feeding cooling agent cools off or controls heating original paper 2 heating powers in cooler 16, makes solidification and crystallization interface 15 be in the preceding position of determining; Through certain hour, start pulling off device 14 then, condenser 11 and platform 12 are moved forward along guide rail 13, thereby drive crucible or model 3 same moved further, to solidify part 9 and pull out (maintenance solidification and crystallization interface 15 relative magnetic field position are constant) at a predetermined velocity, until the complete solidification and crystallization of melt.
Superconducting coil feeds direct current and is up to 1000A, and the magnetic induction density B in the magnetic field of generation is in the 1-40T scope, and Bz (dBz/dz) is worth at 200-3400T
2In/m the scope, according to material and different.
Material therefor can be rare earth metal, metallic copper, metallic aluminium and alloy iron and steel etc.
Claims (2)
1. strong magnetic field gradient unidirectional solidification crystallization apparatus, include the superconducting magnet that superconducting coil is housed, heating element heater, heat-insulation layer, controlled pull unit etc., the central authorities that it is characterized in that this device are provided with a crucible or a model (3) that holds molten state material (4), its side is provided with heating element heater (2), heating element heater (2) arranged outside has heat-insulation layer (8), press close to heat-insulation layer (8) again and locate to be provided with insulated water jacket (5), outermost is provided with superconducting coil (7), superconducting coil (7) places in the Dewar jar (6), be provided with thermal-insulating sealing lid (1) in the top of container crucible or model (3), the bottom is provided with heat-insulation and heat-preservation backing plate (10); In crucible or the model (3), form a solidification and crystallization interface (15) in the molten state material (4) on top and the operating process between the solidification and crystallization part that will form, that be positioned at the bottom (9); Be provided with the cooler (11) that can feed cooling agent below crucible or the model (3); Be provided with guide rail (13) and platform (12) above the pulling off device (14) of device bottom, pulling off device (14) can make the cooler (11) on the platform (12) move forward along guide rail (13), and drives top crucible or the same moved further of model (3).
2. strong magnetic field gradient unidirectional solidification crystallization apparatus according to claim 1 is characterized in that, described superconducting coil feeds direct current and is up to 1000A, and the magnetic induction density B in the magnetic field of generation is in the 1-40T scope, and Bz (dBz/dz) is worth at 200-3400T
2In/m the scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420037333 CN2715885Y (en) | 2004-07-08 | 2004-07-08 | Gradient strong magnetic field unidirectional solidification crystallization apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420037333 CN2715885Y (en) | 2004-07-08 | 2004-07-08 | Gradient strong magnetic field unidirectional solidification crystallization apparatus |
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| CN2715885Y true CN2715885Y (en) | 2005-08-10 |
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| CN 200420037333 Expired - Lifetime CN2715885Y (en) | 2004-07-08 | 2004-07-08 | Gradient strong magnetic field unidirectional solidification crystallization apparatus |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811186A (en) * | 2010-05-27 | 2010-08-25 | 哈尔滨工业大学 | Device for driving solidification and crystallization process by using electrical effect |
| CN102133629A (en) * | 2011-03-01 | 2011-07-27 | 大连理工大学 | Light-alloy electromagnetic suspension casting device and method |
| CN103008623A (en) * | 2012-12-25 | 2013-04-03 | 上海大学 | Method for refining crystal grains by utilizing strong magnetic field and special metal solidification casting device thereof |
| CN103240405A (en) * | 2013-05-13 | 2013-08-14 | 北京科技大学 | In-situ reaction precipitation manufacture device and process of lotus-root-shaped porous metal material |
| CN103464706A (en) * | 2013-09-26 | 2013-12-25 | 上海大学 | Method and device for continuously casting and preparing high-oriented uniform fine-crystalline structure |
| CN102438773B (en) * | 2008-12-15 | 2015-04-01 | 索林开发私人有限公司 | Process for producing multicrystalline silicon ingots by the induction method and apparatus for carrying out the same |
| CN104562181A (en) * | 2015-01-04 | 2015-04-29 | 广东电网有限责任公司电力科学研究院 | Device and method for controlling directionally solidified structures of high-temperature alloy |
| CN104818519A (en) * | 2015-04-21 | 2015-08-05 | 上海大学 | Method for improving properties of nonlinear optical crystal of ZnGeP2 |
| CN105081288A (en) * | 2015-08-17 | 2015-11-25 | 共慧冶金设备科技(苏州)有限公司 | Experiment simulation device and method for studying solidification process of metal melt under temperature field and flow field coupled condition |
| CN105970135A (en) * | 2016-05-11 | 2016-09-28 | 上海大学 | Method and device for manufacturing gradient composed block material through gradient high-intensity magnetic field |
| CN107966467A (en) * | 2017-11-24 | 2018-04-27 | 中国科学院金属研究所 | The experimental provision and experimental method of material solidification under a kind of research microgravity condition |
| CN109280961A (en) * | 2018-10-12 | 2019-01-29 | 宁国市华成金研科技有限公司 | A kind of orientation furnace and single crystal casting method using asynchronous bending techniques |
| CN110117761A (en) * | 2019-05-21 | 2019-08-13 | 上海大学 | A method of reducing alloy graining process microsegregation |
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2004
- 2004-07-08 CN CN 200420037333 patent/CN2715885Y/en not_active Expired - Lifetime
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102438773B (en) * | 2008-12-15 | 2015-04-01 | 索林开发私人有限公司 | Process for producing multicrystalline silicon ingots by the induction method and apparatus for carrying out the same |
| CN101811186A (en) * | 2010-05-27 | 2010-08-25 | 哈尔滨工业大学 | Device for driving solidification and crystallization process by using electrical effect |
| CN101811186B (en) * | 2010-05-27 | 2011-08-17 | 哈尔滨工业大学 | Device for driving solidification and crystallization process by using electrical effect |
| CN102133629A (en) * | 2011-03-01 | 2011-07-27 | 大连理工大学 | Light-alloy electromagnetic suspension casting device and method |
| CN103008623A (en) * | 2012-12-25 | 2013-04-03 | 上海大学 | Method for refining crystal grains by utilizing strong magnetic field and special metal solidification casting device thereof |
| CN103240405A (en) * | 2013-05-13 | 2013-08-14 | 北京科技大学 | In-situ reaction precipitation manufacture device and process of lotus-root-shaped porous metal material |
| CN103240405B (en) * | 2013-05-13 | 2015-03-11 | 北京科技大学 | In-situ reaction precipitation manufacture device and process of lotus-root-shaped porous metal material |
| CN103464706A (en) * | 2013-09-26 | 2013-12-25 | 上海大学 | Method and device for continuously casting and preparing high-oriented uniform fine-crystalline structure |
| CN104562181A (en) * | 2015-01-04 | 2015-04-29 | 广东电网有限责任公司电力科学研究院 | Device and method for controlling directionally solidified structures of high-temperature alloy |
| CN104818519A (en) * | 2015-04-21 | 2015-08-05 | 上海大学 | Method for improving properties of nonlinear optical crystal of ZnGeP2 |
| CN105081288A (en) * | 2015-08-17 | 2015-11-25 | 共慧冶金设备科技(苏州)有限公司 | Experiment simulation device and method for studying solidification process of metal melt under temperature field and flow field coupled condition |
| CN105081288B (en) * | 2015-08-17 | 2018-11-27 | 共慧冶金设备科技(苏州)有限公司 | It is a kind of for studying the experimental simulation device and method of metal bath process of setting under temperature field-flow field coupling condition |
| CN105970135A (en) * | 2016-05-11 | 2016-09-28 | 上海大学 | Method and device for manufacturing gradient composed block material through gradient high-intensity magnetic field |
| CN105970135B (en) * | 2016-05-11 | 2019-02-22 | 上海大学 | Utilize the method and apparatus of strong magnetic field gradient preparation gradient composition block materials |
| CN107966467A (en) * | 2017-11-24 | 2018-04-27 | 中国科学院金属研究所 | The experimental provision and experimental method of material solidification under a kind of research microgravity condition |
| CN109280961A (en) * | 2018-10-12 | 2019-01-29 | 宁国市华成金研科技有限公司 | A kind of orientation furnace and single crystal casting method using asynchronous bending techniques |
| CN110117761A (en) * | 2019-05-21 | 2019-08-13 | 上海大学 | A method of reducing alloy graining process microsegregation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shanxi Chunlei Copper Material Co., Ltd. Assignor: Shanghai University Contract fulfillment period: 2009.6.20 to 2014.6.20 Contract record no.: 2009310000161 Denomination of utility model: Gradient strong magnetic field unidirectional solidification crystallization apparatus Granted publication date: 20050810 License type: Exclusive license Record date: 20090812 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.6.20 TO 2014.6.20; CHANGE OF CONTRACT Name of requester: SHANXI CHUNLEI COPPER CO., LTD. Effective date: 20090812 |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140708 Granted publication date: 20050810 |