WO2005100893A1 - 落下型静電浮遊炉 - Google Patents
落下型静電浮遊炉 Download PDFInfo
- Publication number
- WO2005100893A1 WO2005100893A1 PCT/JP2004/004754 JP2004004754W WO2005100893A1 WO 2005100893 A1 WO2005100893 A1 WO 2005100893A1 JP 2004004754 W JP2004004754 W JP 2004004754W WO 2005100893 A1 WO2005100893 A1 WO 2005100893A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sample
- furnace
- drop
- lower electrode
- type electrostatic
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
- F27B17/02—Furnaces of a kind not covered by any preceding group specially designed for laboratory use
Definitions
- the present invention relates to a drop-type electrostatic floating furnace used to place a charged sample in a floating state by an electric field generated between electrodes and perform a heat treatment on the sample.
- an electrostatic levitation furnace includes a pair of electrodes and an optical system that irradiates a sample suspended between the electrodes with a laser beam focused and introduced externally in a sealed space that can be scavenged to a vacuum.
- the charged sample is placed in a floating state by an electric field generated between the electrodes, and the sample is irradiated with laser light to perform a non-contact heat treatment.
- this type of electrostatic floating furnace is desirably used in a weightless (including minute) environment in order to achieve better heat treatment of the sample.
- a weightless environment It was mentioned that it was mounted on a spacecraft or aircraft, or a drop tower that allowed the electrostatic levitation furnace to fall freely.
- the gravity level is about 10 to 2 G, which is not necessarily sufficient for a weightless environment. It was not something. Also, when using a spacecraft or a falling tower, the gravity level is about 10 to 3 G compared to an aircraft, which is satisfactory for a weightless environment. However, there are problems that the equipment becomes large and the cost becomes enormous, and that it is difficult to perform many experiments while changing the parameters. It was. Disclosure of the invention
- the present invention has been made in view of the above-mentioned conventional circumstances, and it is possible to obtain a sufficient weightless environment with a relatively simple apparatus configuration on the ground and realize a significant reduction in cost.
- the purpose is to provide a drop-type electrostatic levitation furnace that can be used.
- the drop-type electrostatic floating furnace of the present invention is an electrostatic floating furnace that heats a charged sample in a floating state by an electric field generated between the electrodes, and performs a vacuum treatment on a lower side of the furnace body.
- the furnace is characterized in that a drop tube that can be scavenged is connected vertically so that the furnace body ⁇ communicates with the inside of the drop tube, and that the sample can be dropped into the drop tube.
- the heating source for the sample is a laser beam introduced from the upper side of the furnace main body, and the lower electrode is focused and irradiated with the introduced laser beam toward the sample. It is equipped with a light irradiation optical system, a lower electrode that can be dropped from the falling tube, and an electrode holding mechanism that cuts off current to the lower electrode and releases the lower electrode at the same time. are doing.
- the lower electrode has an opening at the lower side for allowing a sample to pass therethrough, and a lower end of the drop tube has an electrode receiver for receiving the lower electrode; It is characterized by having a sample receiver that receives the sample below the receiver.
- the falling-type electrostatic levitation furnace of the present invention is characterized in that the falling tube is provided with a gate valve for vertically dividing the internal space, and a vacuum pump is provided for each of the upper space and the lower space. It is a feature.
- FIG. 1 is a schematic view for explaining an embodiment of a drop-type electrostatic floating furnace according to the present invention.
- FIG. 1 is a cross-sectional view (a) showing an initial state of a heat treatment, and shows a state where a sample and a lower electrode are falling.
- B shows a state where a sample and a lower electrode are falling.
- B shows a state where the sample and the lower electrode are dropped.
- FIG. 1 is a view showing one embodiment of a drop type electrostatic levitation furnace of the present invention.
- a drop tube 3 that can be evacuated to vacuum is connected vertically to the bottom of the furnace body 2, and the inside of the furnace body 2 and the inside of the drop tube 3 are connected.
- the sample A can be dropped into the drop tube 3 in a non-contact state.
- the furnace main body 2 forms a sealed space 4 except for the connection part of the drop tube 3, and the closed space 4 is provided with an upper electrode 5 and a lower electrode 6 that are vertically opposed to each other, and are not shown. However, it is equipped with a plurality of access ports, and is equipped with various devices such as a sample A supply device, a position detection device, a temperature measurement device, a force camera for imaging the sample A, and lighting.
- a laser oscillator is arranged outside the figure, and a heating source for the sample A is a plurality of laser beams L introduced vertically from the upper side of the furnace body 2.
- the lower electrode 6 is integrally provided with a condensing irradiation optical system 7 for condensing and irradiating the plurality of laser beams L introduced from above toward the central sample A, It is arranged so that it can drop together with sample A in a non-contact state and is held by the electrode holding mechanism 8.
- the lower electrode 6 has an opening 9 at the center thereof through which the sample A can pass.
- the condensing irradiation optical system 7 is a concave condensing reflecting mirror or a combination of a reflecting mirror and a condensing lens.
- a plurality of laser beams L introduced from the upper side are reflected substantially horizontally, condensed, and concentratedly irradiated on the sample A to heat the sample A uniformly.
- the electrode holding mechanism 8 holds the lower electrode 6 directly above the drop tube 3 in the furnace main body 2 and has a function of cutting off the power to the lower electrode 6 when the lower electrode 6 is released. I have.
- the drop tube 3 can be set to an appropriate length so that a weightless environment due to the dropping of the sample A can be ensured for a predetermined time.
- a sample receiver 11 for receiving the sample A dropped below the electrode receiver 10 and an airtight door 12 for taking out the dropped sample A and the lower electrode 6 to the outside. Is provided.
- a shock-absorbing sheet or the like to reduce the drop impact of the lower electrode 6 and the sample A can be used.
- the sample A is made amorphous.
- the sample receiver 11 is formed of a rigid body such as metal so that the sample A is beaten and rapidly cooled and solidified.
- the falling tube 3 is provided with a gate valve 13 near the lower end for airtightly separating the upper part of the lower part of the lower part of the space, and a vacuum pump 1 is provided for each of the upper part 14A and the lower part 14B. 5 A and 15 B are provided.
- the above-described electrode receiver 10 and sample receiver 11 are provided in the lower space 14B.
- a vacuum gauge is attached to each of the spaces 14A and 14B. .
- the drop-type electrostatic levitation furnace 1 having the above configuration is basically a relatively simple device configuration in which a drop tube is connected to the lower part of the furnace body, and there are almost no restrictions on the installation location. It can be installed in various facilities such as companies, research institutes and schools. Spacecraft, aircraft or drop towers As a result, the cost can be greatly reduced as compared with the case of using, and a sufficient weightless environment can be obtained as described below.
- drop-type electrostatic levitation furnace 1 the vacuum pump 1 5 A, 1 5 B of least for the also actuates one furnace body 2 and the vacuum inside the drop tube 3 (eg if 1 0- 4 T orr Scavenge).
- the vacuum pump 15A and 15B are operated, the vacuum can of course be obtained in a short time.
- the electrostatic floating furnace 1 the sample A is charged, and the charged sample A is put into a floating state by an electric field generated between the upper and lower electrodes 5 and 6, and the sample A is irradiated with a plurality of laser beams L. A heat treatment is performed.
- the lower electrode 6 falls without contacting the inner surface of the lower electrode 6 with the drop tube 3 ⁇ .
- the electrode holding mechanism 8 cuts off the current to the lower electrode 6 simultaneously with the release of the electrode, so that the electric field disappears and the sample A falls into the drop tube 3.
- the inside of the drop tube 3 is vacuum, the lower electrode 6 and the sample A fall at the same speed while maintaining the mutual positional relationship.
- a plurality of laser beams L are introduced from the upper side of the furnace body 2, and the lower electrode 6 is provided with a condensing irradiation optical system 7, so that the lower electrode 6 and While the sample A is falling, the sample A is continuously irradiated with the plurality of laser beams L as shown in FIG. 1 (b). That is, the sample A is heated in a non-contact and uniform manner in a vacuum atmosphere and a weightless environment due to the drop without being affected by the electric field.
- the electrostatic floating furnace 1 stops transmitting the laser beam L immediately before receiving the lower electrode 6 with the electrode receiver 10, and then stops the lower electrode 6.
- Sample A passing through opening 9 is received by sample receiver 11.
- the electrostatic levitation furnace 1 the sample A is continuously heated until just before it reaches the sample receiver 11, and then the sample A is hit against the sample receiver 11 by gravity and crushed thinly.
- the sample A can be rapidly cooled and solidified to form an amorphous.
- the molten sample A may not adhere to the lower electrode 6.
- FIG. 1 (c) shows not a deformed sample but a sample A that has solidified in a spherical shape.
- the gate valve 13 is closed, the upper space 14A and the lower space 14B are airtightly separated, the lower space 14B is opened to the atmosphere, and the airtight door 12 is opened. Take out sample A and lower electrode 6.
- the vacuum pump 15 is used. It is only necessary to open the gate valve 13 after purging the inside of the lower space 14 B to a vacuum with B, and preparation in a short time is possible.
- the electrostatic levitation furnace 1 can be used on the ground, has a relatively simple apparatus configuration, and has no effect of the electric field on the sample A, and has at least a spacecraft or the like.
- Sample A can be heat-treated in a non-contact environment under a sufficient weightless environment comparable to that when a drop tower is used. Many experiments can be easily performed while changing the meter.
- the electrostatic floating furnace itself is dropped, so the equipment becomes very large. Since only the lower electrode .6 is dropped, the structure is extremely simple for a drop type.
- the configuration of the drop-type electrostatic floating furnace according to the present invention is not limited to the above-described embodiment, and the details of the configuration can be appropriately changed without departing from the gist of the present invention. Further, in the above-described embodiment, the case where the heating is continued while dropping the sample A and the sample A is finally transformed into an amorphous form has been described. However, after the sample A is heated and melted in the furnace body 2, the amorphous form is formed. As shown in the example, the lower electrode 6 is dropped together with the sample A, and the sample A is solidified by maintaining the molten state of the sample A until the influence of the electric field and gravity is eliminated.
- the electric field may be removed by cutting off the current to the electrodes 5 and 6 so that only the sample A may be dropped. In this case, the influence of the electric field may be reduced. As a result, Sample A can be coagulated in a sufficiently weightless environment. In this case, it is desirable to provide a cushioning material such as a shock absorbing sheet in the sample receiver 11 in order to prevent the solidified sample A from being damaged.
- the fall type electrostatic levitation furnace of this invention while having the comparatively simple apparatus structure which connected the fall tube to the lower side of the furnace main body, the sample heated in the furnace main body was dropped in the fall tube.
- a sufficient weightless environment a gravity level of about 10 to 3 G
- the coagulation of the sample can be performed satisfactorily by eliminating the influence of the electric field.
- space navigation The cost can be significantly reduced compared to using a vehicle, an aircraft, or a falling tower, and a large number of experiments can be easily performed while changing parameters.
- the lower electrode provided with the condensing irradiation optical system is dropped together with the sample in the drop tube, so that the dropping is performed. It is possible to continue heating the sample inside with laser light. In other words, it is possible to maintain the molten state of the sample in a weightless environment due to dropping.At this time, since the power to the lower electrode is cut off, the influence of the electric field is also eliminated, and the sample is heated and solidified. It can be performed.
- the sample receiver is formed of a rigid body such as a metal, and heated by laser light until just before the sample reaches the sample receiver.
- the sample By striking the sample against the sample receiver with gravity, the sample can be rapidly cooled and solidified to form an amorphous.
- the lower electrode and the sample are separated by the upper and lower receivers, it is possible to prevent a situation where the molten sample adheres to the lower electrode.
- the inside of the furnace body and the inside of the drop tube can be evacuated in a short time by two vacuum pumps, When removing the sample or lower electrode that has fallen into the drop tube, close the gate valve and open only the lower space to the atmosphere to maintain the vacuum state in the furnace body and the upper space. When performing the next experiment, it is only necessary to evacuate the lower space and open the gate valve, so that preparation can be performed in a short time.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2004/004754 WO2005100893A1 (ja) | 2004-03-31 | 2004-03-31 | 落下型静電浮遊炉 |
CNB2004800425858A CN100498176C (zh) | 2004-03-31 | 2004-03-31 | 下落型静电悬浮炉 |
US11/547,513 US7864829B2 (en) | 2004-03-31 | 2004-03-31 | Dropping model electrostatic levitation furnace |
JP2006512183A JP4439513B2 (ja) | 2004-03-31 | 2004-03-31 | 落下型静電浮遊炉 |
DE112004002816T DE112004002816B4 (de) | 2004-03-31 | 2004-03-31 | Elektrostatischer Schwebeofen des Fall-Typs |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2004/004754 WO2005100893A1 (ja) | 2004-03-31 | 2004-03-31 | 落下型静電浮遊炉 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005100893A1 true WO2005100893A1 (ja) | 2005-10-27 |
Family
ID=35150092
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/004754 WO2005100893A1 (ja) | 2004-03-31 | 2004-03-31 | 落下型静電浮遊炉 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7864829B2 (ja) |
JP (1) | JP4439513B2 (ja) |
CN (1) | CN100498176C (ja) |
DE (1) | DE112004002816B4 (ja) |
WO (1) | WO2005100893A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102322738B (zh) * | 2011-06-16 | 2013-06-26 | 西北工业大学 | 激光快速成形表面气氛加热炉 |
US10155615B2 (en) | 2016-09-26 | 2018-12-18 | Dow Global Technologies Llc | Seal bar and process for using same |
EP3966545B1 (en) * | 2019-05-07 | 2024-04-17 | Scienta Omicron AB | Holding device for a sample and a system for heating a sample using such a holding device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0491000A (ja) * | 1990-08-03 | 1992-03-24 | Hitachi Ltd | カプセル落下装置 |
JPH11241888A (ja) * | 1998-02-25 | 1999-09-07 | Mitsubishi Electric Corp | 静電浮遊炉 |
JP2002192332A (ja) * | 2000-12-21 | 2002-07-10 | Fuji Electric Co Ltd | 浮揚溶解鋳造装置 |
JP2003139469A (ja) * | 2001-11-02 | 2003-05-14 | Sukegawa Electric Co Ltd | 自然落下式熱処理方法及び熱処理炉 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4521854A (en) * | 1982-10-29 | 1985-06-04 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Closed loop electrostatic levitation system |
US4553917A (en) * | 1982-12-21 | 1985-11-19 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Apparatus for production of ultrapure amorphous metals utilizing acoustic cooling |
US5319670A (en) * | 1992-07-24 | 1994-06-07 | The United States Of America As Represented By The United States Department Of Energy | Velocity damper for electromagnetically levitated materials |
AU736457B2 (en) * | 1997-08-27 | 2001-07-26 | Sphelar Power Corporation | Spherical semiconductor device and the manufacture method for the same and spherical semiconductor device material |
US6153007A (en) * | 1997-10-23 | 2000-11-28 | Nakata; Josuke | Method of manufacturing a single crystal and apparatus for manufacturing single crystal |
WO2003029742A1 (fr) * | 2001-09-28 | 2003-04-10 | Ihi Aerospace Co., Ltd. | Four a levitation electrostatique |
US6763019B2 (en) * | 2002-03-05 | 2004-07-13 | Nokia Corporation | Method and system for authenticated fast channel change of media provided over a DSL connection |
JP4270368B2 (ja) * | 2003-03-20 | 2009-05-27 | 株式会社Ihiエアロスペース | 静電浮遊炉及びこれを用いた試料の融合方法 |
JP4013226B2 (ja) * | 2004-01-29 | 2007-11-28 | 独立行政法人 宇宙航空研究開発機構 | 無容器凝固法によるバリウムチタン酸化物単結晶材料片の製造方法 |
-
2004
- 2004-03-31 DE DE112004002816T patent/DE112004002816B4/de not_active Expired - Fee Related
- 2004-03-31 JP JP2006512183A patent/JP4439513B2/ja not_active Expired - Fee Related
- 2004-03-31 CN CNB2004800425858A patent/CN100498176C/zh not_active Expired - Fee Related
- 2004-03-31 US US11/547,513 patent/US7864829B2/en not_active Expired - Fee Related
- 2004-03-31 WO PCT/JP2004/004754 patent/WO2005100893A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0491000A (ja) * | 1990-08-03 | 1992-03-24 | Hitachi Ltd | カプセル落下装置 |
JPH11241888A (ja) * | 1998-02-25 | 1999-09-07 | Mitsubishi Electric Corp | 静電浮遊炉 |
JP2002192332A (ja) * | 2000-12-21 | 2002-07-10 | Fuji Electric Co Ltd | 浮揚溶解鋳造装置 |
JP2003139469A (ja) * | 2001-11-02 | 2003-05-14 | Sukegawa Electric Co Ltd | 自然落下式熱処理方法及び熱処理炉 |
Also Published As
Publication number | Publication date |
---|---|
US20070274368A1 (en) | 2007-11-29 |
JPWO2005100893A1 (ja) | 2008-08-28 |
CN100498176C (zh) | 2009-06-10 |
US7864829B2 (en) | 2011-01-04 |
DE112004002816B4 (de) | 2012-09-13 |
JP4439513B2 (ja) | 2010-03-24 |
CN1926396A (zh) | 2007-03-07 |
DE112004002816T5 (de) | 2007-02-15 |
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