FR2261808A1 - Production of quarz single crystals - having seed crystal plates inclined to the vertical to avoid particle inclusions - Google Patents

Production of quarz single crystals - having seed crystal plates inclined to the vertical to avoid particle inclusions

Info

Publication number
FR2261808A1
FR2261808A1 FR7406335A FR7406335A FR2261808A1 FR 2261808 A1 FR2261808 A1 FR 2261808A1 FR 7406335 A FR7406335 A FR 7406335A FR 7406335 A FR7406335 A FR 7406335A FR 2261808 A1 FR2261808 A1 FR 2261808A1
Authority
FR
France
Prior art keywords
seed crystal
quarz
production
vertical
crystal plates
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
FR7406335A
Other languages
French (fr)
Other versions
FR2261808B1 (en
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.)
INST SINTEZA MINERALNOGO SYR
Original Assignee
INST SINTEZA MINERALNOGO SYR
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 INST SINTEZA MINERALNOGO SYR filed Critical INST SINTEZA MINERALNOGO SYR
Priority to FR7406335A priority Critical patent/FR2261808A1/en
Publication of FR2261808A1 publication Critical patent/FR2261808A1/en
Application granted granted Critical
Publication of FR2261808B1 publication Critical patent/FR2261808B1/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
    • C30B7/00—Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions
    • C30B7/10—Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions by application of pressure, e.g. hydrothermal processes
    • 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
    • C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
    • C30B29/54—Organic compounds
    • C30B29/58—Macromolecular compounds
    • 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
    • C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
    • C30B29/60—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape characterised by shape
    • 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
    • C30B7/00—Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions

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

Synthetic angle crystals, esp. of quartz for radiation and optical appts. are produced from hydrothermal solns. under pressure in an autoclave using the temp. drop process. The seed crystal plates are orientated to the gravity axis at an angle 45-90 degrees. The upper surfaces of the plates are protected by a plate of inert material which causes the growth to be preferentially on the lower side of the plate. It can even be arranged that the protective plate is so dimensioned that no growth whatever occurs on the upper surface. The method produces crystals on the lower growth surface with =10 structural faults per cm2.
FR7406335A 1974-02-25 1974-02-25 Production of quarz single crystals - having seed crystal plates inclined to the vertical to avoid particle inclusions Granted FR2261808A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7406335A FR2261808A1 (en) 1974-02-25 1974-02-25 Production of quarz single crystals - having seed crystal plates inclined to the vertical to avoid particle inclusions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7406335A FR2261808A1 (en) 1974-02-25 1974-02-25 Production of quarz single crystals - having seed crystal plates inclined to the vertical to avoid particle inclusions

Publications (2)

Publication Number Publication Date
FR2261808A1 true FR2261808A1 (en) 1975-09-19
FR2261808B1 FR2261808B1 (en) 1976-12-03

Family

ID=9135402

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7406335A Granted FR2261808A1 (en) 1974-02-25 1974-02-25 Production of quarz single crystals - having seed crystal plates inclined to the vertical to avoid particle inclusions

Country Status (1)

Country Link
FR (1) FR2261808A1 (en)

Also Published As

Publication number Publication date
FR2261808B1 (en) 1976-12-03

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Legal Events

Date Code Title Description
ST Notification of lapse