GB577631A - Improvements in and relating to insulation for magnetic steel and the like - Google Patents

Improvements in and relating to insulation for magnetic steel and the like

Info

Publication number
GB577631A
GB577631A GB12784/44A GB1278444A GB577631A GB 577631 A GB577631 A GB 577631A GB 12784/44 A GB12784/44 A GB 12784/44A GB 1278444 A GB1278444 A GB 1278444A GB 577631 A GB577631 A GB 577631A
Authority
GB
United Kingdom
Prior art keywords
per cent
vermiculite
bentonite
magnesium oxide
relating
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
GB12784/44A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB577631A publication Critical patent/GB577631A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/10—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances metallic oxides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B30/00—Compositions for artificial stone, not containing binders
    • 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
    • H01F1/14—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 metals or alloys
    • H01F1/147—Alloys characterised by their composition
    • H01F1/14766—Fe-Si based alloys
    • H01F1/14775—Fe-Si based alloys in the form of sheets
    • H01F1/14783—Fe-Si based alloys in the form of sheets with insulating coating
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00482—Coating or impregnation materials
    • C04B2111/00525—Coating or impregnation materials for metallic surfaces

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Dispersion Chemistry (AREA)
  • Power Engineering (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Chemical Treatment Of Metals (AREA)

Abstract

Magnetic sheet material has a thin insulating coating consisting of vermiculite and magnesium oxide. The latter has a specific gravity of about 3.58 and comprises about 2 per cent. Bentonite may be added with a flux such as feldspar. Two examples are: (1) vermiculite 49 per cent, bentonite 49 per cent and magnesium oxide 2 per cent; and (2) vermiculite 38 per cent, bentonite 55 per cent, feldspar 5 per cent and magnesium oxide 2 per cent. The mixture is added to water and sprayed on to the sheet material which is then dried and annealed. The laminations may be used for electric transformers and motors.
GB12784/44A 1943-07-07 1944-07-05 Improvements in and relating to insulation for magnetic steel and the like Expired GB577631A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US577631XA 1943-07-07 1943-07-07

Publications (1)

Publication Number Publication Date
GB577631A true GB577631A (en) 1946-05-24

Family

ID=22012612

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12784/44A Expired GB577631A (en) 1943-07-07 1944-07-05 Improvements in and relating to insulation for magnetic steel and the like

Country Status (1)

Country Link
GB (1) GB577631A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1018172B (en) * 1954-08-26 1957-10-24 Westinghouse Electric Corp Coatings for ferromagnetic sheets

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1018172B (en) * 1954-08-26 1957-10-24 Westinghouse Electric Corp Coatings for ferromagnetic sheets

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