FR2234037A1 - Growing single crystals - by seeding of agitated, temp-controlled supersaturated soln - Google Patents

Growing single crystals - by seeding of agitated, temp-controlled supersaturated soln

Info

Publication number
FR2234037A1
FR2234037A1 FR7323051A FR7323051A FR2234037A1 FR 2234037 A1 FR2234037 A1 FR 2234037A1 FR 7323051 A FR7323051 A FR 7323051A FR 7323051 A FR7323051 A FR 7323051A FR 2234037 A1 FR2234037 A1 FR 2234037A1
Authority
FR
France
Prior art keywords
crystal
agitators
supersaturated
soln
rising currents
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
FR7323051A
Other languages
French (fr)
Other versions
FR2234037B1 (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.)
Laboratoires dElectronique Philips SAS
Original Assignee
Laboratoires dElectronique et de Physique Appliquee
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 Laboratoires dElectronique et de Physique Appliquee filed Critical Laboratoires dElectronique et de Physique Appliquee
Priority to FR7323051A priority Critical patent/FR2234037A1/en
Publication of FR2234037A1 publication Critical patent/FR2234037A1/en
Application granted granted Critical
Publication of FR2234037B1 publication Critical patent/FR2234037B1/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

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

Supersaturated soln. of chemical to be crystallised is agitated sufficiently to ensure homogeneity, thereby promoting perfect crystal morphology, without producing excessive velocity past the crystal which could affect the crystal form. The agitators used form rising currents of small cross-sectional area in locations away from the growing crystal; the resulting downflow occurs across the rest of the cross-sectional area of containing vessel and is of low velocity. A pref. configuration is of three rising currents forming, in plan, the points of an equilateral triangle with the crystal at the point of intersection of the three axes of symmetry. An alternative configuration is of several rising currents forming, in plan, the centre and points of a regular polygon with several crystals each on an axis of symmetry of the equilateral triangles constituting the polygon. Agitators need only be immersed superficially in the fluid, and regular disposition of the agitators permits homogenisation of large free columns of fluid.
FR7323051A 1973-06-25 1973-06-25 Growing single crystals - by seeding of agitated, temp-controlled supersaturated soln Granted FR2234037A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7323051A FR2234037A1 (en) 1973-06-25 1973-06-25 Growing single crystals - by seeding of agitated, temp-controlled supersaturated soln

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7323051A FR2234037A1 (en) 1973-06-25 1973-06-25 Growing single crystals - by seeding of agitated, temp-controlled supersaturated soln

Publications (2)

Publication Number Publication Date
FR2234037A1 true FR2234037A1 (en) 1975-01-17
FR2234037B1 FR2234037B1 (en) 1976-09-17

Family

ID=9121486

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7323051A Granted FR2234037A1 (en) 1973-06-25 1973-06-25 Growing single crystals - by seeding of agitated, temp-controlled supersaturated soln

Country Status (1)

Country Link
FR (1) FR2234037A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2531635A1 (en) * 2010-02-01 2012-12-12 Michael Krautter Device for crystal growth at intermediate temperatures using controlled semi-active cooling

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2531635A1 (en) * 2010-02-01 2012-12-12 Michael Krautter Device for crystal growth at intermediate temperatures using controlled semi-active cooling
EP2531635A4 (en) * 2010-02-01 2014-01-01 Michael Krautter Device for crystal growth at intermediate temperatures using controlled semi-active cooling

Also Published As

Publication number Publication date
FR2234037B1 (en) 1976-09-17

Similar Documents

Publication Publication Date Title
FR2234037A1 (en) Growing single crystals - by seeding of agitated, temp-controlled supersaturated soln
GB1300333A (en) Improvements in devices for etching semi-conductor discs
GB1277544A (en) Apparatus for obtaining cell cultures
BoucK et al. Observations on Gas Bubble Disease in Adult Columbia River Sockeye Salmon(Oncorhynchus Nerka)
JPS52106384A (en) Nematic liquid crystal composition
JPS5252870A (en) Continuous crystallization apparatus
JPS5355048A (en) Liquid crystal color display device
JPS52104946A (en) Display element
JPS5421860A (en) Production of liquid crystal elements
VINBERG STUDIES OF BIOLOGICAL ENERGY BALANCE AND BIOLOGICAL PRODUCTIVITY IN THE USSR LAKES(IN RUSSIAN)
Kapshivyi et al. Solution of basic problems in axisymmetric elasticity theory for a space with a spherical incision(Axisymmetric elasticity theory problems for stress-strain state of space with spherical incision, obtaining solutions with p-analytic functions)
McGiffert The Economy of Symmetry
Gamow Will Our Sun Ever Explode?
SU617040A1 (en) Pulsed extractor
JPS5382197A (en) Liquid crystal display device
JPS52138958A (en) Liquid crystal color display device
JPS5421861A (en) Production of liquid crystal elements
JPS52120796A (en) Liquid crystal display unit
MINFORD et al. Interdiffusion and association phenomena in the system NiO-Al 2 O 3[Interim Report, Jun. 1972- Jun. 1973]
HAMADA et al. The study of a single crystal high polymer(Surface fold structure of high polymer single crystals)
DEOLIVEIRA GENERAL HYDROBIOLOGY WITH PARTICULAR APPLICATION TO SCHISTOSOMA VECTORS. HYPEREUTROPHY, A MODERN PROBLEM OF BODIES OF WATER
JPS5210692A (en) Crystalline liquid indicator cell
GB1034747A (en) Production of coloured potato chips
Avduevskii et al. Hydromechanics and heat and mass transfer during the production of materials(Gidromekhanika i teplomassoobmen pri poluchenii materialov)
Okazaki SKELETAL MATRIX IN SEA URCHIN LARVAE

Legal Events

Date Code Title Description
CD Change of name or company name
ST Notification of lapse