GB1386356A - Zone melting process - Google Patents

Zone melting process

Info

Publication number
GB1386356A
GB1386356A GB3340772A GB3340772A GB1386356A GB 1386356 A GB1386356 A GB 1386356A GB 3340772 A GB3340772 A GB 3340772A GB 3340772 A GB3340772 A GB 3340772A GB 1386356 A GB1386356 A GB 1386356A
Authority
GB
United Kingdom
Prior art keywords
charge
narrower
cross
section
zone melting
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
GB3340772A
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.)
Preussag AG
Original Assignee
Preussag AG
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 Preussag AG filed Critical Preussag AG
Publication of GB1386356A publication Critical patent/GB1386356A/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

Abstract

1386356 Zone melting PREUSSAG AG 17 July 1972 [15 July 1971] 33407/72 Heading B1S In a zone melting process wherein the material treated is in the form of an elongated charge e.g. a tube, and through which an electrical charge is passed longitudinally, the melted zone is formed in the region of a cross-section narrower which constricts the cross-section of the charge only in this region. The narrower may be a plate with an aperture smaller than the charge. The aperture may be annular in shape or have a substantially conical widening inlet or outlet. The charge may be pressed with constant force against the narrower e.g. by weight of the charge and/or additional weights. The charge may be moved against a plurality of narrowers if desired. The charge may be purified or formed into a monocrystal using a seed crystal. As shown in the figure the charge 1 is connected by lines 2 and 3 to a current source 4, and the charge reduced in cross-section by narrower 5, formed with a slot-shaped aperture 6, provided with inlet 7 and an outlet 6 which has a curved wall 8.
GB3340772A 1971-07-15 1972-07-17 Zone melting process Expired GB1386356A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712135305 DE2135305C3 (en) 1971-07-15 1971-07-15 Process for zone melting

Publications (1)

Publication Number Publication Date
GB1386356A true GB1386356A (en) 1975-03-05

Family

ID=5813720

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3340772A Expired GB1386356A (en) 1971-07-15 1972-07-17 Zone melting process

Country Status (4)

Country Link
JP (1) JPS5116004B1 (en)
DE (1) DE2135305C3 (en)
FR (1) FR2145534B1 (en)
GB (1) GB1386356A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5381203U (en) * 1976-12-07 1978-07-06
JPS5427006U (en) * 1977-07-25 1979-02-22
JPS5430002U (en) * 1977-07-29 1979-02-27

Also Published As

Publication number Publication date
DE2135305C3 (en) 1975-04-10
DE2135305A1 (en) 1973-02-01
DE2135305B2 (en) 1973-09-20
FR2145534A1 (en) 1973-02-23
JPS5116004B1 (en) 1976-05-21
FR2145534B1 (en) 1978-03-03

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee