DIELECTRIC MATERIAL PRODUCTION METHOD, DIELECTRIC MATERIAL, AND ULTRASONIC SENSOR

Title:

DIELECTRIC MATERIAL PRODUCTION METHOD, DIELECTRIC MATERIAL, AND ULTRASONIC SENSOR

Document Type and Number:

WIPO Patent Application WO/2021/192744

Kind Code:

A1

Abstract:

This dielectric material production method comprises: a step for mixing lithium carbonate and niobium oxide to obtain a mixture so that the molar ratio of lithium to niobium is larger than 50/50 and equal to or less than 56/44; and a step for firing the mixture to obtain a fired product in which LiNbO3 crystals and Li3NbO4 crystals coexist.

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Inventors:

ASAI YUKI (JP)
NAKANO TAKASHI (JP)
TSURU YASUHIKO (JP)
YAMAMOTO YUKO (JP)
FUKUYAMA MISAKI (JP)
JINNO KENTARO (JP)

Application Number:

PCT/JP2021/005886

Publication Date:

September 30, 2021

Filing Date:

February 17, 2021

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Assignee:

MITSUBISHI HEAVY IND LTD (JP)

International Classes:

C04B35/495; H01B3/12; G01N29/24; H01L41/187

Domestic Patent References:

WO2018070072A1

2018-04-19

Foreign References:

JP2003298132A	2003-10-17
JP2013197541A	2013-09-30
JP2014029810A	2014-02-13
JP2020009756A	2020-01-16
JP2015053236A	2015-03-19

Other References:

SHIMADA, SHIRO ET AL.: "A Study on the Formation and Sintering of LiNb03", BULLETIN OF THE FACULTY OF ENGINEERING, HOKKAIDO UNIVERSITY, 1978, pages 95 - 102
SINGH, KAMAL: "X-ray induced dielectric properties of stoichiometrically varied lithium niobate single crystals", SOLID STATE IONICS, vol. 31, no. 2, 1988, pages 139 - 146, XP024657779, DOI: 10.1016/0167-2738(88)90298-6

Attorney, Agent or Firm:

SEISHIN IP PATENT FIRM, P.C. (JP)

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