GB1180330A - Process and Device for Zone-Melting with the Aid of High Frequency Gas Discharges - Google Patents

Process and Device for Zone-Melting with the Aid of High Frequency Gas Discharges

Info

Publication number
GB1180330A
GB1180330A GB4253068A GB4253068A GB1180330A GB 1180330 A GB1180330 A GB 1180330A GB 4253068 A GB4253068 A GB 4253068A GB 4253068 A GB4253068 A GB 4253068A GB 1180330 A GB1180330 A GB 1180330A
Authority
GB
United Kingdom
Prior art keywords
melting
zone
electrodes
aid
high frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4253068A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Consortium fuer Elektrochemische Industrie GmbH
Original Assignee
Consortium fuer Elektrochemische Industrie GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19671619951 external-priority patent/DE1619951C3/en
Application filed by Consortium fuer Elektrochemische Industrie GmbH filed Critical Consortium fuer Elektrochemische Industrie GmbH
Publication of GB1180330A publication Critical patent/GB1180330A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/30—Plasma torches using applied electromagnetic fields, e.g. high frequency or microwave energy
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B13/00—Single-crystal growth by zone-melting; Refining by zone-melting
    • C30B13/16—Heating of the molten zone
    • C30B13/22—Heating of the molten zone by irradiation or electric discharge

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Plasma & Fusion (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electromagnetism (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1,180,330. Zone-melting. CONSORTIUM FUR ELEKTROCHEMISCHE INDUSTRIE G.m.b.H. 6 Sept., 1968 [9 Sept., 1967], No. 42530/68. Heading BIS. In the zone-melting of a rod 7 using a gas discharge 8 between a pair of cooled electrodes 2 and 3, a pressure of 50-1,000 mm of Hg, a voltage of 200-2,000 volts, and a frequency of 0.1-3 x 10<SP>3</SP> megacycles/sec is employed. Afterheating may be effected by a second pair of electrodes in parallel with the zone-melting electrodes (Fig. 2). Alternatively, a single pair of electrodes having curved ends (Fig. 4) may effect zone-melting and before-and-after heating. A number of gases and rod materials are specified.
GB4253068A 1967-09-09 1968-09-06 Process and Device for Zone-Melting with the Aid of High Frequency Gas Discharges Expired GB1180330A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19671619951 DE1619951C3 (en) 1967-09-09 1967-09-09 Process for the production of boron monocrystals by zone melting of rods made of boron by means of a gas discharge

Publications (1)

Publication Number Publication Date
GB1180330A true GB1180330A (en) 1970-02-04

Family

ID=5682468

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4253068A Expired GB1180330A (en) 1967-09-09 1968-09-06 Process and Device for Zone-Melting with the Aid of High Frequency Gas Discharges

Country Status (2)

Country Link
FR (1) FR1581300A (en)
GB (1) GB1180330A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2611132A1 (en) * 1987-02-19 1988-08-26 Descartes Universite Rene BISTOURI A PLASMA
WO1998039953A1 (en) * 1997-03-04 1998-09-11 Bernhard Platzer Method and device for producing plasma

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2438499A1 (en) * 1978-10-13 1980-05-09 Anvar Purificn. and prepn. of single crystals - using plasma jet source, heating a moving boat of material and a coolant jet following

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2611132A1 (en) * 1987-02-19 1988-08-26 Descartes Universite Rene BISTOURI A PLASMA
WO1998039953A1 (en) * 1997-03-04 1998-09-11 Bernhard Platzer Method and device for producing plasma
AU743870B2 (en) * 1997-03-04 2002-02-07 Bernhard Platzer Method and device for producing plasma

Also Published As

Publication number Publication date
FR1581300A (en) 1969-09-12

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