GB1452210A - Powdery insulating material - Google Patents

Powdery insulating material

Info

Publication number
GB1452210A
GB1452210A GB3547874A GB3547874A GB1452210A GB 1452210 A GB1452210 A GB 1452210A GB 3547874 A GB3547874 A GB 3547874A GB 3547874 A GB3547874 A GB 3547874A GB 1452210 A GB1452210 A GB 1452210A
Authority
GB
United Kingdom
Prior art keywords
oxide
2mgo
3mgo
mgo
magnesium oxide
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
GB3547874A
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.)
Teijin Ltd
Original Assignee
Teijin 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
Priority claimed from JP8996473A external-priority patent/JPS5039338A/ja
Priority claimed from JP48102223A external-priority patent/JPS52776B2/ja
Application filed by Teijin Ltd filed Critical Teijin Ltd
Publication of GB1452210A publication Critical patent/GB1452210A/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
    • 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
    • H01B3/002—Inhomogeneous material in general
    • H01B3/006—Other inhomogeneous material

Abstract

1452210 Magnesium oxide-boron oxide composition TEIJIN Ltd 12 Aug 1974 [13 Aug 1973 12 Sept 1973] 35478/74 Headings C1J and C1A [Also in Division C3] An electrically insulating powdery material has a volume resistivity (measured in defined manner) of at least 1 Î 10<SP>10</SP> ohms-cm and particles each of which comprises a core of magnesium oxide whose entire surface is surrounded by a sheath comprising a double oxide of magnesium oxide and boron oxide and optionally double oxides of both the magnesium oxide and the boron oxide with one or more of titanium oxide, iron oxide and chromium oxide. It may be made by calcining under conditions such that 80/t + 800 < T < 80/t + 1200 where T is calcining temperature (‹ C.), t is calcining time (hours) and t < 1/12. The powdery material may be dispersed in a resin material (see Division C3) which may in turn contain other fillers in addition, e.g. clay, glass, asbestos, mica, talc or quartz. Sheath compositions referred to in the examples are 3MgOB 2 O 3 ; 3MgO.B 2 O 3 , 2MgO.B 2 O 3 ; BMgO.B 2 O 3 , 2MgO.- B 2 O 3 , TiBO 3 , MgO.TiO 2 ; 3MgO.B 2 O 3 , 2MgO.- B 2 O 3 , MgOFe 2 O 3 , FeBO 3 ; MgO.B 2 O 3 , MgO.- Cr 2 O 3 , CrBO 3 ; and 3MgO.B 2 O 3 , 2MgO.B 2 O 3 , 2MgO.TiO 2 , MgOFe 2 O 3 , TiBO 3 , FeBO 3 .
GB3547874A 1973-08-13 1974-08-12 Powdery insulating material Expired GB1452210A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8996473A JPS5039338A (en) 1973-08-13 1973-08-13
JP48102223A JPS52776B2 (en) 1973-09-12 1973-09-12

Publications (1)

Publication Number Publication Date
GB1452210A true GB1452210A (en) 1976-10-13

Family

ID=26431340

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3547874A Expired GB1452210A (en) 1973-08-13 1974-08-12 Powdery insulating material

Country Status (3)

Country Link
CA (1) CA1039490A (en)
GB (1) GB1452210A (en)
IT (1) IT1019927B (en)

Also Published As

Publication number Publication date
DE2438904A1 (en) 1975-03-06
DE2438904B2 (en) 1976-04-22
IT1019927B (en) 1977-11-30
CA1039490A (en) 1978-10-03

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee