GB1059527A - Improvements in electrical heating elements and insulation therefor - Google Patents

Improvements in electrical heating elements and insulation therefor

Info

Publication number
GB1059527A
GB1059527A GB44199/63A GB4419963A GB1059527A GB 1059527 A GB1059527 A GB 1059527A GB 44199/63 A GB44199/63 A GB 44199/63A GB 4419963 A GB4419963 A GB 4419963A GB 1059527 A GB1059527 A GB 1059527A
Authority
GB
United Kingdom
Prior art keywords
insulation
heating elements
electrical heating
conductivity
ionic conductivity
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
GB44199/63A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB1059527A publication Critical patent/GB1059527A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/10—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/18—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor the conductor being embedded in an insulating material

Abstract

The magnesia insulation of a conventional sheathed electrical resistance heating element includes lithium oxide up to 0.010 mole per cent in order to give the insulation a fraction of ionic conductivity to total conductivity no higher than 0.6 at 1000 DEG C. A comparison is made between insulation with and without lithium oxide, and characteristics are given for such specimens showing the variation of their fraction of ionic conductivity with temperature, Fig. 2 (not shown). Variation of the ionic conductivity and electronic conductivity of the insulation with temperature is also discussed.
GB44199/63A 1962-11-30 1963-11-08 Improvements in electrical heating elements and insulation therefor Expired GB1059527A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US241378A US3201738A (en) 1962-11-30 1962-11-30 Electrical heating element and insulation therefor

Publications (1)

Publication Number Publication Date
GB1059527A true GB1059527A (en) 1967-02-22

Family

ID=22910477

Family Applications (1)

Application Number Title Priority Date Filing Date
GB44199/63A Expired GB1059527A (en) 1962-11-30 1963-11-08 Improvements in electrical heating elements and insulation therefor

Country Status (4)

Country Link
US (1) US3201738A (en)
JP (2) JPS4317150B1 (en)
DE (1) DE1465028B1 (en)
GB (1) GB1059527A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2313836A1 (en) * 1975-06-07 1976-12-31 Dynamit Nobel Ag PROCESS FOR OBTAINING MAGNESIA WITH HIGH ELECTRICAL RESISTANCE FOR TUBULAR HEATING ELEMENTS

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE327767B (en) * 1964-02-07 1970-08-31 Kanthal Ab
US3477058A (en) * 1968-02-01 1969-11-04 Gen Electric Magnesia insulated heating elements and methods of production
US3583919A (en) * 1968-02-01 1971-06-08 Gen Electric Electrical insulating refractory composition of fused magnesium oxide and silica or alkali metal silicates
JPS5227598A (en) * 1975-08-28 1977-03-01 Hitachi Heating Appliance Co Ltd Carged material for a heating unit
JPS52158576U (en) * 1976-05-27 1977-12-01
US4234786A (en) * 1979-02-12 1980-11-18 General Electric Company Magnesia insulated heating elements and method of making the same
DE3272855D1 (en) * 1981-05-19 1986-10-02 Matsushita Electric Ind Co Ltd A shielded heating element
US4473654A (en) * 1983-08-18 1984-09-25 The J. E. Baker Company Low temperature bonding of refractory aggregates and refractory products of improved cold strength
JPH01174302U (en) * 1988-05-28 1989-12-12
US5835679A (en) 1994-12-29 1998-11-10 Energy Converters, Inc. Polymeric immersion heating element with skeletal support and optional heat transfer fins
US6263158B1 (en) 1999-05-11 2001-07-17 Watlow Polymer Technologies Fibrous supported polymer encapsulated electrical component
US6188051B1 (en) 1999-06-01 2001-02-13 Watlow Polymer Technologies Method of manufacturing a sheathed electrical heater assembly
US6392208B1 (en) 1999-08-06 2002-05-21 Watlow Polymer Technologies Electrofusing of thermoplastic heating elements and elements made thereby
US6392206B1 (en) 2000-04-07 2002-05-21 Waltow Polymer Technologies Modular heat exchanger
US6433317B1 (en) 2000-04-07 2002-08-13 Watlow Polymer Technologies Molded assembly with heating element captured therein
US6519835B1 (en) 2000-08-18 2003-02-18 Watlow Polymer Technologies Method of formable thermoplastic laminate heated element assembly
US6539171B2 (en) 2001-01-08 2003-03-25 Watlow Polymer Technologies Flexible spirally shaped heating element
US20050098684A1 (en) * 2003-03-14 2005-05-12 Watlow Polymer Technologies Polymer-encapsulated heating elements for controlling the temperature of an aircraft compartment
EP2498572B1 (en) * 2004-02-05 2019-03-06 Worldbest Corporation Radiator apparatus

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2957752A (en) * 1960-10-25 Process for increasing the density of
DE961737C (en) * 1943-07-08 1957-04-11 Siemens Ag Powdery or grainy, electrically insulating heat material for embedding electrical heating conductors
US2823134A (en) * 1955-02-18 1958-02-11 Armour Res Found Densifying magnesia
US2864713A (en) * 1955-09-09 1958-12-16 Gen Electric Co Ltd Ceramic dielectric compositions
US3061752A (en) * 1958-07-28 1962-10-30 English Electric Valve Co Ltd Television camera tubes
US2987689A (en) * 1959-11-10 1961-06-06 Thomas H Lennox Resistance heating device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2313836A1 (en) * 1975-06-07 1976-12-31 Dynamit Nobel Ag PROCESS FOR OBTAINING MAGNESIA WITH HIGH ELECTRICAL RESISTANCE FOR TUBULAR HEATING ELEMENTS

Also Published As

Publication number Publication date
US3201738A (en) 1965-08-17
DE1465028B1 (en) 1970-08-20
JPS4817150B1 (en) 1973-05-26
JPS4317150B1 (en) 1968-07-19

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