GB1339016A - Piezoelectric devices - Google Patents

Piezoelectric devices

Info

Publication number
GB1339016A
GB1339016A GB3502670A GB1339016DA GB1339016A GB 1339016 A GB1339016 A GB 1339016A GB 3502670 A GB3502670 A GB 3502670A GB 1339016D A GB1339016D A GB 1339016DA GB 1339016 A GB1339016 A GB 1339016A
Authority
GB
United Kingdom
Prior art keywords
geo
july
lithium
piezoelectric devices
germanate
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
GB3502670A
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Publication of GB1339016A publication Critical patent/GB1339016A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02543—Characteristics of substrate, e.g. cutting angles
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
  • Glass Compositions (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

1339016 Lithium germanate NATIONAL RESEARCH DEVELOPMENT CORP 15 July 1971 [20 July 1970] 35026/70 Heading C1A [Also in Divisions B1 H1 and H3] Lithium germanate, Li 2 GeO 3 , is prepared by melting together equal molecular quantities of lithium carbonate, Li 2 CO 3 and germanium dioxide, GeO 2 . The compound melts at about 1,250‹ C. and single crystals, which have piezoelectric properties, may be pulled from the melt using the Czochralski method.
GB3502670A 1970-07-20 1970-07-20 Piezoelectric devices Expired GB1339016A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3502670 1970-07-20

Publications (1)

Publication Number Publication Date
GB1339016A true GB1339016A (en) 1973-11-28

Family

ID=10372922

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3502670A Expired GB1339016A (en) 1970-07-20 1970-07-20 Piezoelectric devices

Country Status (2)

Country Link
US (1) US3670186A (en)
GB (1) GB1339016A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157522B (en) * 1984-04-09 1987-08-19 Philips Electronic Associated Electrical filter comprising an acoustic surface wave device, and method of manufacturing such a filter
JP3106387B2 (en) * 1995-04-04 2000-11-06 株式会社村田製作所 Surface acoustic wave device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2871192A (en) * 1955-03-03 1959-01-27 Clevite Corp Quartz crystal
US3256498A (en) * 1963-10-07 1966-06-14 Damon Eng Inc Crystal controlled oscillator with frequency modulating circuit
US3283164A (en) * 1963-12-19 1966-11-01 Bell Telephone Labor Inc Devices utilizing lithium meta-gallate
US3582838A (en) * 1966-09-27 1971-06-01 Zenith Radio Corp Surface wave devices

Also Published As

Publication number Publication date
US3670186A (en) 1972-06-13

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees