GB1145371A - Field responsive devices and materials - Google Patents

Field responsive devices and materials

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Publication number
GB1145371A
GB1145371A GB6666/66A GB666666A GB1145371A GB 1145371 A GB1145371 A GB 1145371A GB 6666/66 A GB6666/66 A GB 6666/66A GB 666666 A GB666666 A GB 666666A GB 1145371 A GB1145371 A GB 1145371A
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United Kingdom
Prior art keywords
additive
area
diagram
feb
per cent
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GB6666/66A
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Clevite Corp
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Clevite Corp
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Publication date
Application filed by Clevite Corp filed Critical Clevite Corp
Publication of GB1145371A publication Critical patent/GB1145371A/en
Expired legal-status Critical Current

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    • 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
    • C04B35/453—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 zinc, tin, or bismuth oxides or solid solutions thereof with other oxides, e.g. zincates, stannates or bismuthates
    • C04B35/457—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 zinc, tin, or bismuth oxides or solid solutions thereof with other oxides, e.g. zincates, stannates or bismuthates based on tin oxides or stannates
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    • 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
    • C04B35/48—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 zirconium or hafnium oxides, zirconates, zircon or hafnates
    • C04B35/49—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 zirconium or hafnium oxides, zirconates, zircon or hafnates containing also titanium oxides or titanates
    • C04B35/491—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 zirconium or hafnium oxides, zirconates, zircon or hafnates containing also titanium oxides or titanates based on lead zirconates and lead titanates, e.g. PZT
    • C04B35/493—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 zirconium or hafnium oxides, zirconates, zircon or hafnates containing also titanium oxides or titanates based on lead zirconates and lead titanates, e.g. PZT containing also other lead compounds
    • 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
    • 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
    • H01G7/06—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture having a dielectric selected for the variation of its permittivity with applied voltage, i.e. ferroelectric capacitors
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/85—Piezoelectric or electrostrictive active materials
    • H10N30/853—Ceramic compositions
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    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
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  • Engineering & Computer Science (AREA)
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  • Ceramic Engineering (AREA)
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  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Inorganic Chemistry (AREA)
  • Composite Materials (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

1,145,371. Ferroelectric capacitors; piezoelectric elements. CLEVITE CORP. 15 Feb., 1966 [24 Feb., 1965], No. 6666/66. Headings HIE and H1K. A ceramic material suitable for use in a voltage variable capacitor or piezoelectric element consists of a lead zirconate-titanate stannate composition lying within the area ABCD of the triaxial diagram shown in Fig. 1d, and containing an additive ingredient having an ionic radius matching that of lead, tin, titanium, zirconium or oxygen and a valence state higher than said element by less than three units, the ingredient replacing a quantity -of the element having an equal number of valence units. For material within area ABCFE of the diagram the additive must include at least one element selected from bismuth, chromium, tungsten, iron, uranium, antimony, strontium, calcium, barium and magnesium, and the total additive concentration must lie in the range 0-1 to 20 atom per cent, and between 0-1 and 5 atom per cent if one of the additives is Bi, Cr, W, Fe, U or Sb. The material preferably includes a further additive from niobium, tantalum, lanthanum and the trivalent rare earth elements and these may be used as alternatives to the above listed additives in compositions lying within area DEF of the diagram. The oxygen content of the composition may be partially substituted by fluorine. A number of preferred compositions are listed in Table A in the Specification. Devices may be made by applying contacts to opposed faces of discs of the material. The electrical properties of the materials and the internal changes of crystal structure around the Curie temperature which give rise to them are discussed in the Specification.
GB6666/66A 1965-02-24 1966-02-15 Field responsive devices and materials Expired GB1145371A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US43485865A 1965-02-24 1965-02-24

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GB1145371A true GB1145371A (en) 1969-03-12

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GB6666/66A Expired GB1145371A (en) 1965-02-24 1966-02-15 Field responsive devices and materials

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FR (1) FR91513E (en)
GB (1) GB1145371A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2852795A1 (en) * 1977-12-06 1979-06-07 Sony Corp ELECTROMECHANICAL CONVERTER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2852795A1 (en) * 1977-12-06 1979-06-07 Sony Corp ELECTROMECHANICAL CONVERTER

Also Published As

Publication number Publication date
FR91513E (en) 1968-06-28

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