FR2445680A1 - Electrically resistive perovskite compsns. - suitable for electrical heaters operating at high temps. - Google Patents

Electrically resistive perovskite compsns. - suitable for electrical heaters operating at high temps.

Info

Publication number
FR2445680A1
FR2445680A1 FR7837006A FR7837006A FR2445680A1 FR 2445680 A1 FR2445680 A1 FR 2445680A1 FR 7837006 A FR7837006 A FR 7837006A FR 7837006 A FR7837006 A FR 7837006A FR 2445680 A1 FR2445680 A1 FR 2445680A1
Authority
FR
France
Prior art keywords
compsns
electrically resistive
perovskite
high temps
electrical heaters
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.)
Granted
Application number
FR7837006A
Other languages
French (fr)
Other versions
FR2445680B1 (en
Inventor
Jean-Claude Grenier
Michel Pouchard
Paul Hagenmuller
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.)
Bpifrance Financement SA
Original Assignee
Agence National de Valorisation de la Recherche ANVAR
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 Agence National de Valorisation de la Recherche ANVAR filed Critical Agence National de Valorisation de la Recherche ANVAR
Priority to FR7837006A priority Critical patent/FR2445680A1/en
Publication of FR2445680A1 publication Critical patent/FR2445680A1/en
Application granted granted Critical
Publication of FR2445680B1 publication Critical patent/FR2445680B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
    • H01C7/022—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient mainly consisting of non-metallic substances
    • H01C7/023—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient mainly consisting of non-metallic substances containing oxides or oxidic compounds, e.g. ferrites
    • H01C7/025—Perovskites, e.g. titanates
    • 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
    • C04B35/26—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 ferrites
    • C04B35/2641—Compositions containing one or more ferrites of the group comprising rare earth metals and one or more ferrites of the group comprising alkali metals, alkaline earth metals or lead
    • 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
    • C04B35/26—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 ferrites
    • C04B35/2683—Other ferrites containing alkaline earth metals or lead
    • 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—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
    • H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
    • H05B3/141—Conductive ceramics, e.g. metal oxides, metal carbides, barium titanate, ferrites, zirconia, vitrous compounds
    • 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
    • H05B3/62—Heating elements specially adapted for furnaces

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)

Abstract

Electrically resistive compsns. are described of compsn. A1-yA'yFe1-xMxO3-z where 0y1; 0.=x1;0=z=0.5; A and A' are cation capable of occupying octahedral lattice sites and M a cation capable of occupying octahedral sites (6-coordinating, or 5 or 4 coordinating when oxygen vacancies occur in the octahedron), with the restriction that y0-5 when A' is Ca2+. A may be selected from Na+; K+, Rb+, Bi3+, Y3+ and Ln3+; A' from Ca2+, Sr2+, Ba2+ and Pb2+ and M from 3 d transition elements, Al3+, Ga3+, In3+, Mg2+, Nb5+, Ta5+, Ti +, Zr4+, W6+, Ru3+ to Ru5+ and Rh3+. The compsns have high conductivity and sufficiently high m. pts. for them to be used at high temps. yet remain stable in air or excess O2 pressure.
FR7837006A 1978-12-29 1978-12-29 Electrically resistive perovskite compsns. - suitable for electrical heaters operating at high temps. Granted FR2445680A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7837006A FR2445680A1 (en) 1978-12-29 1978-12-29 Electrically resistive perovskite compsns. - suitable for electrical heaters operating at high temps.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7837006A FR2445680A1 (en) 1978-12-29 1978-12-29 Electrically resistive perovskite compsns. - suitable for electrical heaters operating at high temps.

Publications (2)

Publication Number Publication Date
FR2445680A1 true FR2445680A1 (en) 1980-07-25
FR2445680B1 FR2445680B1 (en) 1982-04-09

Family

ID=9216771

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7837006A Granted FR2445680A1 (en) 1978-12-29 1978-12-29 Electrically resistive perovskite compsns. - suitable for electrical heaters operating at high temps.

Country Status (1)

Country Link
FR (1) FR2445680A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4978646A (en) * 1989-03-03 1990-12-18 Corning Incorporated Capacitors and high dielectric constant ceramics therefor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL95807C (en) * 1954-06-26 1960-11-15
US3610888A (en) * 1970-01-30 1971-10-05 Westinghouse Electric Corp Oxide resistor heating element

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL95807C (en) * 1954-06-26 1960-11-15
US3610888A (en) * 1970-01-30 1971-10-05 Westinghouse Electric Corp Oxide resistor heating element

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CA1973 *
EXBK/76 *
EXBK/77 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4978646A (en) * 1989-03-03 1990-12-18 Corning Incorporated Capacitors and high dielectric constant ceramics therefor

Also Published As

Publication number Publication date
FR2445680B1 (en) 1982-04-09

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