Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1999-08-12
2000-08-29
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
252 629, 310359, 310366, H01L 4108
Patent
active
061113395
ABSTRACT:
A thin porous piezoelectric Pb(Zr,Ti)O.sub.3 ceramic sheet having a thickness of 0.05 to 2 mm which is favorably employable for manufacturing a piezoelectric transducer has small pores essentially all of which have a size of less than 25 .mu.m in which pores having a size of 5 to 25 .mu.m have a mean pore size of 1/10 to 1/1,000 based on the thickness of the ceramic sheet, and which shows a ratio of apparent density to true density in the range of 5/10 to 9/10.
REFERENCES:
patent: 4686409 (1987-08-01), Kaarmann et al.
patent: 4777153 (1988-10-01), Sonuparlak et al.
patent: 5874126 (1999-02-01), Kahn et al.
Nishio Norihiro
Ohya Shigemasa
Sekimori Kenji
Budd Mark O.
Ueda Japan Radio Co., Ltd.
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