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FR2352587A1 - Furnace for crystal growing - has screen movable progressively between heated wall and crucible, giving controllable, vibrationless crystallisation - Google Patents

Furnace for crystal growing - has screen movable progressively between heated wall and crucible, giving controllable, vibrationless crystallisation

Info

Publication number
FR2352587A1
FR2352587A1 FR7615827A FR7615827A FR2352587A1 FR 2352587 A1 FR2352587 A1 FR 2352587A1 FR 7615827 A FR7615827 A FR 7615827A FR 7615827 A FR7615827 A FR 7615827A FR 2352587 A1 FR2352587 A1 FR 2352587A1
Authority
FR
France
Prior art keywords
crucible
furnace
heated wall
screen
vibrationless
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.)
Granted
Application number
FR7615827A
Other languages
French (fr)
Other versions
FR2352587B1 (en
Inventor
Herve Le Gal
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
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 Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Priority to FR7615827A priority Critical patent/FR2352587A1/en
Publication of FR2352587A1 publication Critical patent/FR2352587A1/en
Application granted granted Critical
Publication of FR2352587B1 publication Critical patent/FR2352587B1/fr
Granted 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
    • C30B11/00—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method
    • C30B11/003—Heating or cooling of the melt or the crystallised material

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

A furnace of the Bridgeman type, for making crystals, with a heated wall e.g. cylindrical, and contg. a support for a crucible, incorporates a screen which can be moved axially in a controlled manner between the heated wall and the crucible, so that it masks the crucible as it moves. A process using the furnace consists of filling the crucible with the material being crystallised, while the screen is in its low position, heating the furnace to a temp. above the m.pt. of the substance and constant over the zone of the crucible, and raising the screen slowly until the substance has completely crystallised. The furnace is easier to control and fre from the risk of vibrations or of superheating, than existing furnaces in which the crucible is cooled or the temp. of the furnace wall is varied.
FR7615827A 1976-05-25 1976-05-25 Furnace for crystal growing - has screen movable progressively between heated wall and crucible, giving controllable, vibrationless crystallisation Granted FR2352587A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7615827A FR2352587A1 (en) 1976-05-25 1976-05-25 Furnace for crystal growing - has screen movable progressively between heated wall and crucible, giving controllable, vibrationless crystallisation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7615827A FR2352587A1 (en) 1976-05-25 1976-05-25 Furnace for crystal growing - has screen movable progressively between heated wall and crucible, giving controllable, vibrationless crystallisation

Publications (2)

Publication Number Publication Date
FR2352587A1 true FR2352587A1 (en) 1977-12-23
FR2352587B1 FR2352587B1 (en) 1979-10-12

Family

ID=9173624

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7615827A Granted FR2352587A1 (en) 1976-05-25 1976-05-25 Furnace for crystal growing - has screen movable progressively between heated wall and crucible, giving controllable, vibrationless crystallisation

Country Status (1)

Country Link
FR (1) FR2352587A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0775766A1 (en) * 1995-11-23 1997-05-28 Commissariat A L'energie Atomique Crystallisation furnace for producing material with low thermal conductivity and/or low hardness
US7918936B2 (en) 2005-08-25 2011-04-05 Gt Crystal Systems, Llc System and method for crystal growing

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0775766A1 (en) * 1995-11-23 1997-05-28 Commissariat A L'energie Atomique Crystallisation furnace for producing material with low thermal conductivity and/or low hardness
FR2741633A1 (en) * 1995-11-23 1997-05-30 Commissariat Energie Atomique CRYSTALLIZATION OVEN FOR MATERIAL WITH LOW THERMAL CONDUCTIVITY AND / OR LOW HARDNESS
US5772761A (en) * 1995-11-23 1998-06-30 Commissariat A L'energie Atomique Crystallization furnace for material with low thermal conductivity and/or low hardness
US7918936B2 (en) 2005-08-25 2011-04-05 Gt Crystal Systems, Llc System and method for crystal growing
US8177910B2 (en) 2005-08-25 2012-05-15 Gt Crystal Systems, Llc System and method for crystal growing

Also Published As

Publication number Publication date
FR2352587B1 (en) 1979-10-12

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Legal Events

Date Code Title Description
ST Notification of lapse