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ES432203A1 - Spherical void-free particle formation in spray-dried ferrites - Google Patents

Spherical void-free particle formation in spray-dried ferrites

Info

Publication number
ES432203A1
ES432203A1 ES432203A ES432203A ES432203A1 ES 432203 A1 ES432203 A1 ES 432203A1 ES 432203 A ES432203 A ES 432203A ES 432203 A ES432203 A ES 432203A ES 432203 A1 ES432203 A1 ES 432203A1
Authority
ES
Spain
Prior art keywords
dried
essentially spherical
ferrites
spray
suspension
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
ES432203A
Other languages
Spanish (es)
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Publication of ES432203A1 publication Critical patent/ES432203A1/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
    • B01J2/04—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a gaseous medium
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/10—Developers with toner particles characterised by carrier particles
    • G03G9/107—Developers with toner particles characterised by carrier particles having magnetic components
    • G03G9/1075—Structural characteristics of the carrier particles, e.g. shape or crystallographic structure
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/10—Developers with toner particles characterised by carrier particles
    • G03G9/107—Developers with toner particles characterised by carrier particles having magnetic components
    • G03G9/108—Ferrite carrier, e.g. magnetite
    • G03G9/1085—Ferrite carrier, e.g. magnetite with non-ferrous metal oxide, e.g. MgO-Fe2O3
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/36—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Power Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Compounds Of Iron (AREA)
  • Magnetic Ceramics (AREA)
  • Soft Magnetic Materials (AREA)
  • Catalysts (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

A process for the manufacture of essentially spherical, void-free ferrite particles, which consists of preparing a suspension of ferrite-forming metal oxides in a liquid, where said suspension has a viscosity of around 23ºC comprised between approximately 55,000 and 140,000 centipoises, dried by atomizing said suspension of metal oxides to form essentially spherical metal oxide beads and sintering said essentially spherical metal oxide beads to form ferrite particles which are essentially spherical in shape, continuous in surface and free of internal voids. (Machine-translation by Google Translate, not legally binding)
ES432203A 1973-12-12 1974-11-22 Spherical void-free particle formation in spray-dried ferrites Expired ES432203A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US42414673A 1973-12-12 1973-12-12

Publications (1)

Publication Number Publication Date
ES432203A1 true ES432203A1 (en) 1977-02-16

Family

ID=23681631

Family Applications (1)

Application Number Title Priority Date Filing Date
ES432203A Expired ES432203A1 (en) 1973-12-12 1974-11-22 Spherical void-free particle formation in spray-dried ferrites

Country Status (10)

Country Link
JP (1) JPS5090996A (en)
BR (1) BR7409417A (en)
CA (1) CA1054837A (en)
DE (1) DE2452671C3 (en)
ES (1) ES432203A1 (en)
FR (1) FR2254536B1 (en)
GB (1) GB1481711A (en)
IT (1) IT1026878B (en)
NL (1) NL7415657A (en)
SE (1) SE397887B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MX146295A (en) * 1975-10-29 1982-06-03 Xerox Corp IMPROVED METHOD FOR PRODUCING HUMIDITY INSENSITIVE AND COATED FERRITE PARTICLES
FR2389968B1 (en) * 1977-05-02 1983-02-04 Burroughs Corp
JPS58145622A (en) * 1982-02-12 1983-08-30 Tdk Corp Magnetic carrier particle
JPS58145625A (en) * 1982-02-12 1983-08-30 Tdk Corp Magnetic carrier particle
US4480093A (en) * 1983-05-23 1984-10-30 Borg-Warner Chemicals, Inc. Amines salts of phosphoric acid
JPS60458A (en) * 1983-06-09 1985-01-05 Kanto Denka Kogyo Kk Carrier for electrophotography
JPS6060930A (en) * 1983-09-13 1985-04-08 Dowa Mining Co Ltd Manufacture of spherical ferrite powder
DE3809694A1 (en) * 1988-03-23 1989-10-05 Hoechst Ceram Tec Ag METHOD FOR PRODUCING A RELEASE AGENT FOR MULTI-LAYER BURNING CERAMIC FILMS
EP0394020B1 (en) * 1989-04-19 1994-09-14 Toda Kogyo Corp. Ferrite particles and ferrite resin composite for bonded magnetic core and process for their production
JP2743009B2 (en) * 1989-04-19 1998-04-22 戸田工業株式会社 Ferrite particle powder for bond core and method for producing the same
FR2786479B1 (en) * 1998-11-26 2001-10-19 Commissariat Energie Atomique PREPARATION BY ATOMIZATION-DRYING OF A CASTABLE POWDER OF URANIUM BIOXIDE OBTAINED BY DRY CONVERSION OF UF6

Also Published As

Publication number Publication date
DE2452671C3 (en) 1979-12-20
GB1481711A (en) 1977-08-03
IT1026878B (en) 1978-10-20
JPS5090996A (en) 1975-07-21
BR7409417A (en) 1976-05-18
NL7415657A (en) 1975-03-27
DE2452671B2 (en) 1979-04-12
DE2452671A1 (en) 1975-06-26
FR2254536A1 (en) 1975-07-11
FR2254536B1 (en) 1982-04-16
SE397887B (en) 1977-11-21
CA1054837A (en) 1979-05-22
SE7415379L (en) 1975-06-13

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