GB810448A - Methods of and apparatus for treating solid-liquid systems - Google Patents

Methods of and apparatus for treating solid-liquid systems

Info

Publication number
GB810448A
GB810448A GB18591/56A GB1859156A GB810448A GB 810448 A GB810448 A GB 810448A GB 18591/56 A GB18591/56 A GB 18591/56A GB 1859156 A GB1859156 A GB 1859156A GB 810448 A GB810448 A GB 810448A
Authority
GB
United Kingdom
Prior art keywords
molten
rod
magnetic field
zone
clamped
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
GB18591/56A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB810448A publication Critical patent/GB810448A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
    • 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
    • C30B13/005—Continuous growth
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S117/00—Single-crystal, oriented-crystal, and epitaxy growth processes; non-coating apparatus therefor
    • Y10S117/901—Levitation, reduced gravity, microgravity, space

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Furnace Details (AREA)

Abstract

810,448. Zone melting; alloys. WESTERN ELECTRIC CO. Inc. June 15, 1956 [June 17 1955], No. 18591/56. Class 82(1) [Also in Group XXXV] , In a method of treating a body of material in which a portion of the body is liquid and wets an adjacent solid portion of the body, the liquid portion being subjected to a force tending to displace it from a desired position, an electric current is passed through at least the liquid portion and a magnetic field is impressed across this portion so that the electric current and magnetic field co-act to provide a sustaining force which opposes the said displacing force. The method may be applied in zonemelting particularly of semi-conductor materials such as silicon or germanium, in alloying processes by adding a solid or gaseous addition agent to the molten portion or in refining by evaporation of a volatile constituent or reaction of an impurity in the melt with an agent in the surrounding atmosphere. Fig. 2B illustrates the application of the method to a zone melting process, the rod 10, enclosed in quartz tube 11, is clamped at its ends in supports 12 and 13. Electric current is passed along the rod and a magnetic field is set up between magnet faces of opposite polarity, one 25 being shown. Coaction of the current and field produces an upward force which counteracts the effect of gravity on the molten zone 27 produced by induction heater 28. Any suitable atmosphere or a vacuum may be maintained in tube 11 by means of inlet and outlets 19 and 20. The invention may be used for fusing and solidifying in rod form a sintered body or, as shown in Fig. 6, for melting and solidifying in rod form a powdered material. In the latter application a rod 123 is clamped at one end in support 121 the other end being clamped in a moveable support 120 which is moved to the left as powdered material is added from hopper 134 to the molten zone 128. The pole faces of the magnets may be suitably shaped to provide a more uniform field in the region of the molten portion or to provide a graded field decreasing an intensity in the upward direction to improve the stability of the molten zone. A non-uniform magnetic field may also be used to modify the configuration of the molten portion. Specification 769,673 is referred to.
GB18591/56A 1955-06-17 1956-06-15 Methods of and apparatus for treating solid-liquid systems Expired GB810448A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US516221A US2904411A (en) 1955-06-17 1955-06-17 Suspension of liquid material

Publications (1)

Publication Number Publication Date
GB810448A true GB810448A (en) 1959-03-18

Family

ID=24054630

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18591/56A Expired GB810448A (en) 1955-06-17 1956-06-15 Methods of and apparatus for treating solid-liquid systems

Country Status (6)

Country Link
US (1) US2904411A (en)
CH (1) CH345162A (en)
DE (1) DE1051013B (en)
FR (1) FR1148975A (en)
GB (1) GB810448A (en)
NL (2) NL112777C (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3098741A (en) * 1958-04-03 1963-07-23 Wacker Chemie Gmbh Process for effecting crucibleless melting of materials and production of shaped bodies therefrom
US3065640A (en) * 1959-08-27 1962-11-27 Thompson Ramo Wooldridge Inc Containment device
US3092462A (en) * 1960-01-28 1963-06-04 Philips Corp Method for the manufacture of rods of meltable material
US3057677A (en) * 1960-10-06 1962-10-09 Bell Telephone Labor Inc Yttrium and rare earth borates
NL274145A (en) * 1961-03-17
US3188244A (en) * 1961-04-24 1965-06-08 Tektronix Inc Method of forming pn junction in semiconductor material
US3203768A (en) * 1961-08-01 1965-08-31 Westinghouse Electric Corp Apparatus of zone refining and controlling solute segregation in solidifying melts by electromagnetic means
FR1326597A (en) * 1962-03-30 1963-05-10 Louyot Comptoir Lyon Alemand Improvement in manufacturing processes by fusion of metals and alloys used in contact with molten materials
NL301308A (en) * 1962-12-06
DE1235875B (en) * 1963-11-13 1967-03-09 Siemens Ag Process for the production of neodymium-doped calcium fluoride single crystals for lasers
US3464812A (en) * 1966-03-29 1969-09-02 Massachusetts Inst Technology Process for making solids and products thereof
US6596076B1 (en) * 1998-06-30 2003-07-22 Director-General Of Agency Of Industrial Science And Technology Apparatus and method for altering the apparent effects of gravity

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB555214A (en) * 1941-11-17 1943-08-10 Jack Sydney Gerber Improved method of, and means for, stirring or circulating molten or liquid materials or mediums
US2686864A (en) * 1951-01-17 1954-08-17 Westinghouse Electric Corp Magnetic levitation and heating of conductive materials
NL168491B (en) * 1951-11-16 Roussel-Uclaf, Societe Anonyme Te Parijs.

Also Published As

Publication number Publication date
DE1051013B (en) 1959-02-19
US2904411A (en) 1959-09-15
CH345162A (en) 1960-03-15
NL206424A (en)
NL112777C (en)
FR1148975A (en) 1957-12-18

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