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GB688179A - Method of polarizing a ceramic transducer - Google Patents

Method of polarizing a ceramic transducer

Info

Publication number
GB688179A
GB688179A GB24228/51A GB2422851A GB688179A GB 688179 A GB688179 A GB 688179A GB 24228/51 A GB24228/51 A GB 24228/51A GB 2422851 A GB2422851 A GB 2422851A GB 688179 A GB688179 A GB 688179A
Authority
GB
United Kingdom
Prior art keywords
points
unit
spaced
voltage
piezo
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
GB24228/51A
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.)
Brush Development Co
Original Assignee
Brush Development 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 Brush Development Co filed Critical Brush Development Co
Publication of GB688179A publication Critical patent/GB688179A/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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
    • H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
    • H03H3/02—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks for the manufacture of piezoelectric or electrostrictive resonators or networks
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/42—Piezoelectric device making

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)

Abstract

688,179. Piezo-electric crystals. BRUSH DEVELOPMENT CO. Oct. 17, 1951 [April 27, 1951], No. 24228/51. Class 40 (viii). Piezo-electric properties are imparted to a fired ceramic material by applying a unidirectional polarizing voltage between two spaced points on its surface for an appreciable time, and then applying the voltage between a further two points on the surface, one being spaced between the first two points and the other-being spaced outside. The material used is a bariuin titanate composition. A flat plate of material can be treated by moving two bars, formed into a unit by insulating spacers and connected each to one terminal of the voltage source, across the surface by a continuous or step-by-step motion. When, as shown, a hollow ceramic cylinder is being treated a unit 11, 12 may treat the outside and a unit 11<1>, 12<1> may treat the inside. The bars in this modification are provided with bristles 30 and 30<1> to make contact with the ceramic element. U.S.A. Specification 2,486,560 is referred to.
GB24228/51A 1951-04-27 1951-10-17 Method of polarizing a ceramic transducer Expired GB688179A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US223389A US2646610A (en) 1951-04-27 1951-04-27 Method of polarizing ceramic transducers

Publications (1)

Publication Number Publication Date
GB688179A true GB688179A (en) 1953-02-25

Family

ID=22836285

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24228/51A Expired GB688179A (en) 1951-04-27 1951-10-17 Method of polarizing a ceramic transducer

Country Status (7)

Country Link
US (1) US2646610A (en)
BE (1) BE510981A (en)
CH (1) CH300405A (en)
DE (1) DE1000621B (en)
FR (1) FR1058988A (en)
GB (1) GB688179A (en)
NL (1) NL86434C (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3071841A (en) * 1957-02-16 1963-01-08 Philips Corp Method of longitudinally pre-polarizing bodies consisting of at least one layer of piezoelectric material
US3193912A (en) * 1963-01-04 1965-07-13 Lab De Rech S Physiques Electro-static particle collecting device
US4734611A (en) * 1985-12-20 1988-03-29 Siemens Aktiengesellschaft Ultrasonic sensor
US5668439A (en) * 1995-10-03 1997-09-16 Xerox Corporation High voltage power supply

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2532100A (en) * 1947-05-29 1950-11-28 Indiana Steel Products Co Electromagnetic transducer head
US2521329A (en) * 1947-08-15 1950-09-05 Brush Dev Co Repolarized transducer system
USRE23813E (en) * 1947-12-26 1954-04-20 Piezoelectric transducer and method for producing same

Also Published As

Publication number Publication date
US2646610A (en) 1953-07-28
DE1000621B (en) 1957-01-10
NL86434C (en)
CH300405A (en) 1954-07-31
BE510981A (en)
FR1058988A (en) 1954-03-22

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