Title:
POROUS PIEZOELECTRIC MATERIAL MOLDED BODY, METHOD OF MANUFACTURING SAME, AND PROBE USING SAID MOLDED BODY
Document Type and Number:
WIPO Patent Application WO/2020/017478
Kind Code:
A1
Abstract:
[Problem] To provide a porous piezoelectric material molded body which has high utility as a constituent member of a piezoelectric vibrator suitable for, in particular, a probe for an ultrasound medical diagnostic device. [Solution] A porous piezoelectric material molded body in which 1000 or more per cubic millimeter of spherical pores having an average pore diameter in a range of 2 to 70 μm are dispersed and formed. The porous piezoelectric material molded body is characterized in that the spherical pores do not include substantially pores with a pore diameter exceeding 50 μm, and that the pores occupying 80% or more of the entire volume of the pores constituting the spherical pores have a pore diameter of within ±20% with respect to the average pore diameter.
Inventors:
NAGAI KIYOSHI (JP)
Application Number:
PCT/JP2019/027827
Publication Date:
January 23, 2020
Filing Date:
July 13, 2019
Export Citation:
Assignee:
NAGAI KIYOSHI (JP)
International Classes:
H01L41/333; C04B35/491; C04B38/06; H01L41/113; H01L41/187; H04R17/00
Foreign References:
| JPH0316974A | 1991-01-24 | |||
| JPH04357181A | 1992-12-10 | |||
| JPH0290579A | 1990-03-30 | |||
| JPH04300253A | 1992-10-23 | |||
| JP2000119063A | 2000-04-25 | |||
| JPS6378700A | 1988-04-08 | |||
| JPH017281A |
Other References:
"Basics and Equipment of Ultrasound", 10 January 2013, VECTOR CORE INC.
K. HIKITAK. YAMADAM. NISHIOKAM. ONO: "Effect of Porous Structure to Piezoelectric Properties of PZT Ceramics", vol. 22, 1983, R&D LABORATORY, MITSUBISHI MINING AND CEMENT CO., pages: 22 - 2,64-66
M. SUZUKI ET AL.: "Effect of size distribution on the relation between coordination number and void fraction of spheres in a randomly packed bed", ADVANCED POWDER TECHNOLOGY, vol. 10, 1999, pages 353 - 365
M. SUZUKI ET AL.: "Effect of size distribution on compressive property of fine powders", JOURNAL OF CHEMICAL INDUSTRY, THE SOCIETY OF POWDER TECHNOLOGY, May 1989 (1989-05-01)
M. SUZUKI ET AL.: "Effect of size distribution on tapping properties of fine powder", POWDER TECHNOLOGY, vol. 118, 2001, pages 53 - 57
HIROTA ET AL.: "Powder Technology Handbook", 1998, NIKKAN KOGYO SHIMBUN
YASUHARU HOSONO: "A study of lead-based piezoelectric single crystals for ultrasonic medical transducers", 2004, TOSHIBA CORPORATE R D CENTER
See also references of EP 3817077A4
K. HIKITAK. YAMADAM. NISHIOKAM. ONO: "Effect of Porous Structure to Piezoelectric Properties of PZT Ceramics", vol. 22, 1983, R&D LABORATORY, MITSUBISHI MINING AND CEMENT CO., pages: 22 - 2,64-66
M. SUZUKI ET AL.: "Effect of size distribution on the relation between coordination number and void fraction of spheres in a randomly packed bed", ADVANCED POWDER TECHNOLOGY, vol. 10, 1999, pages 353 - 365
M. SUZUKI ET AL.: "Effect of size distribution on compressive property of fine powders", JOURNAL OF CHEMICAL INDUSTRY, THE SOCIETY OF POWDER TECHNOLOGY, May 1989 (1989-05-01)
M. SUZUKI ET AL.: "Effect of size distribution on tapping properties of fine powder", POWDER TECHNOLOGY, vol. 118, 2001, pages 53 - 57
HIROTA ET AL.: "Powder Technology Handbook", 1998, NIKKAN KOGYO SHIMBUN
YASUHARU HOSONO: "A study of lead-based piezoelectric single crystals for ultrasonic medical transducers", 2004, TOSHIBA CORPORATE R D CENTER
See also references of EP 3817077A4
Attorney, Agent or Firm:
SAKAMOTO & PARTNERS (JP)
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