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GB1266145A - - Google Patents

Info

Publication number
GB1266145A
GB1266145A GB1604868A GB1266145DA GB1266145A GB 1266145 A GB1266145 A GB 1266145A GB 1604868 A GB1604868 A GB 1604868A GB 1266145D A GB1266145D A GB 1266145DA GB 1266145 A GB1266145 A GB 1266145A
Authority
GB
United Kingdom
Prior art keywords
ferroelectric material
synthetic resin
thermosetting
resin
powder
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
GB1604868A
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 filed Critical
Publication of GB1266145A publication Critical patent/GB1266145A/en
Expired legal-status Critical Current

Links

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
    • H01G7/028—Electrets, i.e. having a permanently-polarised dielectric having a heterogeneous 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
    • H01G7/02—Electrets, i.e. having a permanently-polarised dielectric
    • H01G7/021—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric
    • H01G7/023—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric of macromolecular compounds
    • 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
    • H10N30/01—Manufacture or treatment
    • H10N30/04—Treatments to modify a piezoelectric or electrostrictive property, e.g. polarisation characteristics, vibration characteristics or mode tuning
    • H10N30/045—Treatments to modify a piezoelectric or electrostrictive property, e.g. polarisation characteristics, vibration characteristics or mode tuning by polarising
    • 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
    • H10N30/852—Composite materials, e.g. having 1-3 or 2-2 type connectivity

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

1,266,145. Piezoelectric elements. UNITED KINGDOM ATOMIC ENERGY. 26 March, 1969 [3 April, 1968], No. 16048/68. Heading H1E. An artificial piezoelectric material is made by heavily loading a synthetic resin with a ferroelectric material, curing the resin and then polarizing the composite material as it cools from a temperature above the Curie point of the ferroelectric material. The ferroelectric material may be a powder of barium titanate having a wide variation of grain size, and the synthetic resin preferably consists of a thermosetting material having a low viscosity. An element made according to the invention may be provided with electrodes and applied to the conductive face of a backing slug made from a thermosetting resin loaded with silver-coated glass spheres and tungsten powder as described in Specification 1,266,144.
GB1604868A 1968-04-03 1968-04-03 Expired GB1266145A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1604868 1968-04-03

Publications (1)

Publication Number Publication Date
GB1266145A true GB1266145A (en) 1972-03-08

Family

ID=10070199

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1604868A Expired GB1266145A (en) 1968-04-03 1968-04-03

Country Status (3)

Country Link
DE (1) DE1916849A1 (en)
GB (1) GB1266145A (en)
NL (1) NL6905280A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6124664A (en) * 1998-05-01 2000-09-26 Scimed Life Systems, Inc. Transducer backing material

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3038493C1 (en) * 1980-10-11 1982-02-11 Arthur Pfeiffer Vakuumtechnik Wetzlar Gmbh, 6334 Asslar Plant for heating and drying parts under vacuum by steam condensation and separation of a second high-boiling liquid
DE3208456C2 (en) * 1982-03-09 1985-03-07 Siemens AG, 1000 Berlin und 8000 München Piezoelectric oscillating system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6124664A (en) * 1998-05-01 2000-09-26 Scimed Life Systems, Inc. Transducer backing material
US6315933B1 (en) 1998-05-01 2001-11-13 Scimed Life Systems, Inc. Method of application of a transducer backing material

Also Published As

Publication number Publication date
NL6905280A (en) 1969-10-07
DE1916849A1 (en) 1969-11-06

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed