FR2248587A1 - Dielectric oxyfluorides with high relative permittivity - at and below ambient temp., and insensitive to changes in frequency - Google Patents

Dielectric oxyfluorides with high relative permittivity - at and below ambient temp., and insensitive to changes in frequency

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Publication number
FR2248587A1
FR2248587A1 FR7337373A FR7337373A FR2248587A1 FR 2248587 A1 FR2248587 A1 FR 2248587A1 FR 7337373 A FR7337373 A FR 7337373A FR 7337373 A FR7337373 A FR 7337373A FR 2248587 A1 FR2248587 A1 FR 2248587A1
Authority
FR
France
Prior art keywords
temp
mixt
obtd
cpd
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.)
Granted
Application number
FR7337373A
Other languages
French (fr)
Other versions
FR2248587B1 (en
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 FR7337373A priority Critical patent/FR2248587A1/en
Publication of FR2248587A1 publication Critical patent/FR2248587A1/en
Application granted granted Critical
Publication of FR2248587B1 publication Critical patent/FR2248587B1/fr
Granted legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G7/00—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
    • H01G7/02—Electrets, i.e. having a permanently-polarised dielectric
    • H01G7/025—Electrets, i.e. having a permanently-polarised dielectric having an inorganic dielectric
    • H01G7/026—Electrets, i.e. having a permanently-polarised dielectric having an inorganic dielectric with ceramic dielectric
    • 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
    • H01B3/025—Other inorganic material

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Power Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Inorganic Insulating Materials (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

Dielectric oxyfluorides prodn. by heating a mixt. of simple oxides at adequate time and temp. in a dry inert atmos. the mixt. being the precursor of a ferroelectric reference oxide and contg. a metal fluoride, so that a definite cpd. is obtd. in powder form, the amt. of fluoride and oxides being chosen so that the total cations equal the total anion in the cpd. obtd. The cpd. obtd. may be sintered or pulverised in vacuum and the mixt. may contain a rare earth oxide, e.g. of Gd, or a oxide such a TiO2. The ferroelectric reference oxide may be a simple or complex perovskite; a pyrochlore; of type LiNbO3 or YMnO3; a tungstate bronze e.g. AB2O6 or ABCD5O15; or layer structures e.g. A2BO6. Used for electronic devices operating below ambient temp, also TV receivers. Provides high relative permittivity which is not sensitive to changes in temp. or the frequency of the applied A.C. Field.
FR7337373A 1973-10-19 1973-10-19 Dielectric oxyfluorides with high relative permittivity - at and below ambient temp., and insensitive to changes in frequency Granted FR2248587A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7337373A FR2248587A1 (en) 1973-10-19 1973-10-19 Dielectric oxyfluorides with high relative permittivity - at and below ambient temp., and insensitive to changes in frequency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7337373A FR2248587A1 (en) 1973-10-19 1973-10-19 Dielectric oxyfluorides with high relative permittivity - at and below ambient temp., and insensitive to changes in frequency

Publications (2)

Publication Number Publication Date
FR2248587A1 true FR2248587A1 (en) 1975-05-16
FR2248587B1 FR2248587B1 (en) 1978-09-15

Family

ID=9126678

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7337373A Granted FR2248587A1 (en) 1973-10-19 1973-10-19 Dielectric oxyfluorides with high relative permittivity - at and below ambient temp., and insensitive to changes in frequency

Country Status (1)

Country Link
FR (1) FR2248587A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2555161A1 (en) * 1983-11-23 1985-05-24 Centre Nat Rech Scient New lead-based oxyfluorinated perovskite compositions sintering at low temperature and usable as dielectric ceramics for multilayer capacitors
EP0731060A1 (en) * 1995-03-09 1996-09-11 ETAT FRANCAIS Représenté par le Délégué Général pour l'Armement Ferroelectric perovskites
WO1998006669A1 (en) * 1996-08-09 1998-02-19 E.I. Du Pont De Nemours And Company Crystalline lead-containing oxyfluorides

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2555161A1 (en) * 1983-11-23 1985-05-24 Centre Nat Rech Scient New lead-based oxyfluorinated perovskite compositions sintering at low temperature and usable as dielectric ceramics for multilayer capacitors
EP0731060A1 (en) * 1995-03-09 1996-09-11 ETAT FRANCAIS Représenté par le Délégué Général pour l'Armement Ferroelectric perovskites
FR2731443A1 (en) * 1995-03-09 1996-09-13 France Etat PEROVSKITE FERROELECTRIC
US5683613A (en) * 1995-03-09 1997-11-04 Etat Francais As Represented By The Delegue General Pour L 'armement Ferroelectric perovskites
WO1998006669A1 (en) * 1996-08-09 1998-02-19 E.I. Du Pont De Nemours And Company Crystalline lead-containing oxyfluorides
US5853688A (en) * 1996-08-09 1998-12-29 E. I. Du Pont De Nemours And Company Crystalline lead-containing oxfluorides

Also Published As

Publication number Publication date
FR2248587B1 (en) 1978-09-15

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