GB890668A - Zone refining apparatus - Google Patents

Zone refining apparatus

Info

Publication number
GB890668A
GB890668A GB41134/59A GB4113459A GB890668A GB 890668 A GB890668 A GB 890668A GB 41134/59 A GB41134/59 A GB 41134/59A GB 4113459 A GB4113459 A GB 4113459A GB 890668 A GB890668 A GB 890668A
Authority
GB
United Kingdom
Prior art keywords
pump
passed
plate
block
heat
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
GB41134/59A
Inventor
Robert Washburn Fritts
Sebastian Karrer
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Priority to GB41134/59A priority Critical patent/GB890668A/en
Publication of GB890668A publication Critical patent/GB890668A/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
    • C30B13/18—Heating of the molten zone the heating element being in contact with, or immersed in, the molten zone
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects

Abstract

<PICT:0890668/III/1> Zone-refining of a solid body is effected by means of one or more thermoelectric heat pumps, each pump comprising a thermoelement, e.g. a rectangular block of one of the materials described in Specification 814,594, sandwiched between a pair of thermojunction plates. The direction in which current is passed through the pump from plate to plate is determined by whether the element is of N- or P-type and the direction of travel of the pump. In one embodiment (Fig. 1) the pump is passed through an elongated block of material to be purified in an open container, material being melted by heat emitted by the leading plate, passed round the pump, and solidified by extraction of heat by the other plate. In the second embodiment (Figs. 2 and 3, not shown) four P-N double heat pumps are situated crosswise between two elongated blocks arranged in staggered relationship so that on termination of a pass the unrefined portion of each block is molten. In this embodiment, two successive molten zones are passed through each block, each molten zone in each body being produced by the heatemitting end plates of one double pump and solidified by the heat-absorbing end plates of the next double pump.
GB41134/59A 1959-12-03 1959-12-03 Zone refining apparatus Expired GB890668A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB41134/59A GB890668A (en) 1959-12-03 1959-12-03 Zone refining apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB41134/59A GB890668A (en) 1959-12-03 1959-12-03 Zone refining apparatus

Publications (1)

Publication Number Publication Date
GB890668A true GB890668A (en) 1962-03-07

Family

ID=10418261

Family Applications (1)

Application Number Title Priority Date Filing Date
GB41134/59A Expired GB890668A (en) 1959-12-03 1959-12-03 Zone refining apparatus

Country Status (1)

Country Link
GB (1) GB890668A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1258390B (en) * 1963-06-05 1968-01-11 Philips Patentverwaltung Device for multi-stage zone heating, in particular zone melting
GB2128808A (en) * 1982-10-07 1984-05-02 Planer Prod Ltd Apparatus for the controlled cooling of a product

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1258390B (en) * 1963-06-05 1968-01-11 Philips Patentverwaltung Device for multi-stage zone heating, in particular zone melting
GB2128808A (en) * 1982-10-07 1984-05-02 Planer Prod Ltd Apparatus for the controlled cooling of a product

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