Title:
ELECTRET AND METHOD FOR MANUFACTURING SAME, AND POWER GENERATION DEVICE USING SAME
Document Type and Number:
WIPO Patent Application WO/2015/111689
Kind Code:
A1
Abstract:
This electret is formed from an inorganic insulating body (SiO2, etc.) having a porous structure. The charge density in porous SiO2 is higher than the charge density in non-porous SiO2. This is because the charge is strongly trapped at the interface between the porous SiO2 and the numerous voids present in the SiO2. Therefore, the decrease (%) in the density of charge trapped in the porous SiO2 is lower than the decrease (%) in the density of charge trapped in the non-porous SiO2. In addition, because SiO2 is thermally stable, the thermal stability of a porous SiO2 electret is superior to the thermal stability of a polymer electret. The power outputted by a vibratory power generation device in which a porous SiO2 electret is used is greater than the power outputted by a vibratory power generation device in which a non-porous SiO2 electret or a polymer electret is used.
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Inventors:
AOYAGI SEIJI (JP)
SUZUKI MASATO (JP)
TAKAHASHI TOMOKAZU (JP)
YOSHIKAWA YASUHIRO (JP)
SUZUKI MASATO (JP)
TAKAHASHI TOMOKAZU (JP)
YOSHIKAWA YASUHIRO (JP)
Application Number:
PCT/JP2015/051804
Publication Date:
July 30, 2015
Filing Date:
January 23, 2015
Export Citation:
Assignee:
ROHM CO LTD (JP)
SCHOOL CORP KANSAI UNIVERSITY (JP)
SCHOOL CORP KANSAI UNIVERSITY (JP)
International Classes:
H01G7/02; H02N1/08
Foreign References:
| JP2008141171A | 2008-06-19 | |||
| JP2004120809A | 2004-04-15 | |||
| JP2009190150A | 2009-08-27 | |||
| JP2012200132A | 2012-10-18 | |||
| JP2002248335A | 2002-09-03 | |||
| JP2013535582A | 2013-09-12 |
Attorney, Agent or Firm:
SANO PATENT OFFICE (JP)
Patent business corporation Sano patent firm (JP)
Patent business corporation Sano patent firm (JP)
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