GB980495A - An apparatus for melting powdered material by means of a flame - Google Patents

An apparatus for melting powdered material by means of a flame

Info

Publication number
GB980495A
GB980495A GB22670/61A GB2267061A GB980495A GB 980495 A GB980495 A GB 980495A GB 22670/61 A GB22670/61 A GB 22670/61A GB 2267061 A GB2267061 A GB 2267061A GB 980495 A GB980495 A GB 980495A
Authority
GB
United Kingdom
Prior art keywords
powder
conduit
flame
oxygen
constant
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
GB22670/61A
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.)
Ronette Piezo Electrische Industrie NV
Original Assignee
Ronette Piezo Electrische Industrie NV
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 Ronette Piezo Electrische Industrie NV filed Critical Ronette Piezo Electrische Industrie NV
Publication of GB980495A publication Critical patent/GB980495A/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
    • C30B11/00—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method
    • C30B11/04—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method adding crystallising materials or reactants forming it in situ to the melt
    • C30B11/08—Single-crystal growth by normal freezing or freezing under temperature gradient, e.g. Bridgman-Stockbarger method adding crystallising materials or reactants forming it in situ to the melt every component of the crystal composition being added during the crystallisation
    • C30B11/10—Solid or liquid components, e.g. Verneuil method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J6/00—Heat treatments such as Calcining; Fusing ; Pyrolysis
    • B01J6/005—Fusing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T117/00—Single-crystal, oriented-crystal, and epitaxy growth processes; non-coating apparatus therefor
    • Y10T117/10—Apparatus
    • Y10T117/1004—Apparatus with means for measuring, testing, or sensing
    • Y10T117/1008—Apparatus with means for measuring, testing, or sensing with responsive control means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T117/00—Single-crystal, oriented-crystal, and epitaxy growth processes; non-coating apparatus therefor
    • Y10T117/10—Apparatus
    • Y10T117/1024—Apparatus for crystallization from liquid or supercritical state
    • Y10T117/1028—Crucibleless apparatus having means providing movement of discrete droplets or solid particles to thin-film precursor [e.g., Verneuil method]

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)
  • Silicon Compounds (AREA)

Abstract

In the production of monocrystalline bodies from powdered corundum or spinel, the powder is fluidized in an oxygen stream which entrains a portion of the powder and the suspension is mixed with a combustible gas and burned in a plane to build up a boule of the material on a support which is slowly withdrawn. The oxygen flow rate is adjusted to <PICT:0980495/C1/1> maintain the rate of growth constant. As shown in Fig. 1, the burner comprises an inner tube 1 and an outer concentric tube 2 to which a combustible gas is admitted through a conduit 3 controlled by a regulator 4. The inner tube is connected to a chamber 6 to which oxygen is admitted by a conduit 40 at a rate dependent on the setting of a valve 8. The chamber 6 is also connected by a sleeve 12 to a powder dosing device 11 having a porous plate 15 of sintered glass on to which powder is fed from a conduit 16 and through which oxygen passes from a space 14 supplied from a conduit 9 at a rate dependent on the setting of a valve 10. The valves 8, 10 are moved by a common actuating mechanism 28 so that the sum of the flows through the valves is constant. The flame 18 produced by the burner entrains particles which are deposited on a deposition surface 19 as a gradually growing rod 22. The deposition surface is moved vertically at a constant speed by a rack and pinion 20, 21. The light emitted by the most recently precipitated molten material is sensed by a photo-cell 24, through a lens system 23, and by an amplifier 25 controls the operation of the mechanism 28 so as to maintain constant the distance between the molten material and the burner by varying the supply of powder to the flame. In a modification, Fig. 4, not shown, the powder is stirred by a rotating vane driven by an electric motor. In a further modification (Fig. 3, not shown) the flame is inverted and the inner tube passes downward through the porous plate.
GB22670/61A 1960-06-25 1961-06-22 An apparatus for melting powdered material by means of a flame Expired GB980495A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL253106 1960-06-25

Publications (1)

Publication Number Publication Date
GB980495A true GB980495A (en) 1965-01-13

Family

ID=19752432

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22670/61A Expired GB980495A (en) 1960-06-25 1961-06-22 An apparatus for melting powdered material by means of a flame

Country Status (3)

Country Link
US (1) US3190727A (en)
GB (1) GB980495A (en)
NL (2) NL253106A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2173685A1 (en) * 1972-02-28 1973-10-12 Inst Monokristallov Sublimation burner feed mechanism - for monocrystal refractory prodn

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3428436A (en) * 1963-12-16 1969-02-18 Monsanto Co Methods and apparatus for zone melting
US3282654A (en) * 1964-05-18 1966-11-01 Union Carbide Corp Crystal growing furnace with an alumina liner
NL6512921A (en) * 1965-10-06 1967-04-07
US3493770A (en) * 1966-03-01 1970-02-03 Ibm Radiation sensitive control system for crystal growing apparatus

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB243251A (en) * 1924-12-16 1925-11-26 Gen Electric Co Ltd Improved process for the preparation of translucent rod-shaped bodies from powdered material
US1960615A (en) * 1929-06-25 1934-05-29 Wallace & Tiernan Company Inc Measuring and controlling apparatus
US2472951A (en) * 1946-09-10 1949-06-14 Air Reduction Method and apparatus for controlling torch spacing
US2462995A (en) * 1947-04-11 1949-03-01 Gulf Oil Corp Process control system
GB697419A (en) * 1951-07-13 1953-09-23 Gen Electric Co Ltd Improvements in or relating to apparatus for manufacturing synthetic jewels
GB710306A (en) * 1951-12-21 1954-06-09 Amalgamated Limestone Corp Ltd Improvements relating to the mixing and conveying of powdered materials
US2737997A (en) * 1953-12-01 1956-03-13 Allwood Inc Apparatus for producing uniform mats of pourable particle material
US2924489A (en) * 1954-11-09 1960-02-09 Beckmann Heinrich Process and apparatus for conveying finely divided material
US2792287A (en) * 1956-04-04 1957-05-14 Nat Lead Co Synthetic rutile crystal and method for making same
US2905989A (en) * 1956-05-04 1959-09-29 Koppers Co Inc Method and apparatus for continuous casting of metals
US2874763A (en) * 1956-11-02 1959-02-24 William S Hobbs Unburned fuel detection and burner control
FR1260884A (en) * 1960-06-02 1961-05-12 English Clays Lovering Pochin Process for drying an insoluble material in the form of particles, applying in particular to the drying of kaolin

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2173685A1 (en) * 1972-02-28 1973-10-12 Inst Monokristallov Sublimation burner feed mechanism - for monocrystal refractory prodn

Also Published As

Publication number Publication date
NL113566C (en)
NL253106A (en)
US3190727A (en) 1965-06-22

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