Results 231 to 240 of about 22,436 (254)
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Vacuum, 2002
Abstract The effective electromechanical coupling coefficient has been studied for thin film bulk acoustic wave resonators (TBARs) with fundamental frequencies between 200 and 400 MHz. An increase in the effective electromechanical coupling coefficient ( kt TBAR 2 ) is observed with the increase in the ZnO thickness ratio: thickness of ZnO thin ...
Masaki Takeuchi +4 more
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Abstract The effective electromechanical coupling coefficient has been studied for thin film bulk acoustic wave resonators (TBARs) with fundamental frequencies between 200 and 400 MHz. An increase in the effective electromechanical coupling coefficient ( kt TBAR 2 ) is observed with the increase in the ZnO thickness ratio: thickness of ZnO thin ...
Masaki Takeuchi +4 more
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Ceramics International, 2017
Abstract In this study, lead-free LiNbO3-doped (Na0.535K0.48)NbO3 (NKN) ceramics (NKLxN, x = 0–0.09) were prepared using a conventional mixed oxide method to investigate the effects of LiNbO3 additives on the microstructure and electrical properties. The addition of LiNbO3 reduced the optimal sintering temperature from 1100 to 950 ℃ and increased the
Chung-Ming Weng +6 more
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Abstract In this study, lead-free LiNbO3-doped (Na0.535K0.48)NbO3 (NKN) ceramics (NKLxN, x = 0–0.09) were prepared using a conventional mixed oxide method to investigate the effects of LiNbO3 additives on the microstructure and electrical properties. The addition of LiNbO3 reduced the optimal sintering temperature from 1100 to 950 ℃ and increased the
Chung-Ming Weng +6 more
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Composites Part A: Applied Science and Manufacturing, 2012
Abstract Three phase epoxy/piezoelectric/conductive filler composites were fabricated. The volume fraction of the conductive filler, aluminum, was held constant at 20%, while the volume fraction of the piezoelectric material, PZT was varied from 0.10 to 0.70.
S. Banerjee, K.A. Cook-Chennault
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Abstract Three phase epoxy/piezoelectric/conductive filler composites were fabricated. The volume fraction of the conductive filler, aluminum, was held constant at 20%, while the volume fraction of the piezoelectric material, PZT was varied from 0.10 to 0.70.
S. Banerjee, K.A. Cook-Chennault
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IEEE Ultrasonics Symposium, 2005., 2006
Electrical characteristics were controlled in the 1.8-GHz range film bulk acoustic wave (BAW) resonator by a layer arrangement consisting of ZnO, Al2O3 and SiO2 thin films. BAW resonators with ZnO / Al2O3 / SiO2 and ZnO / SiO2 / Al2O3 structure were designed on secondary harmonics around 1.8GHz using finite element method (FEM).
M. Takeuchi +5 more
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Electrical characteristics were controlled in the 1.8-GHz range film bulk acoustic wave (BAW) resonator by a layer arrangement consisting of ZnO, Al2O3 and SiO2 thin films. BAW resonators with ZnO / Al2O3 / SiO2 and ZnO / SiO2 / Al2O3 structure were designed on secondary harmonics around 1.8GHz using finite element method (FEM).
M. Takeuchi +5 more
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Physica Scripta
Abstract Lamb wave resonators (LWR) have the advantages of high frequency, small size and lithographically defined resonant frequency. To solve the problems of low effective electromechanical coupling coefficient (
Haiyang Li +11 more
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Abstract Lamb wave resonators (LWR) have the advantages of high frequency, small size and lithographically defined resonant frequency. To solve the problems of low effective electromechanical coupling coefficient (
Haiyang Li +11 more
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Journal of Physics D: Applied Physics
Abstract Narrow-band filters are widely applied in the narrow-band Internet of Things (NB-IoT). To meet the diverse bandwidth requirements of NB-IoT applications, this work presents the first antisymmetric (A1) mode Lamb wave resonators (LWRs) based on aluminum nitride (AlN) and AlN/ScAlN composite films.
Zesheng Liu +11 more
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Abstract Narrow-band filters are widely applied in the narrow-band Internet of Things (NB-IoT). To meet the diverse bandwidth requirements of NB-IoT applications, this work presents the first antisymmetric (A1) mode Lamb wave resonators (LWRs) based on aluminum nitride (AlN) and AlN/ScAlN composite films.
Zesheng Liu +11 more
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International Journal of Research and Innovation in Applied Science
Introduction: The study of Pb(Zr1-x, Tix)O3 ceramics is growing due to their wide use as piezoelectric materials. PZT piezoelectric ceramics are a solid solution of ferroelectric PT(PbTiO3) with Curie temperature 490 °C and antiferroelectric PZ(PbZrO3) with Curie temperature 230 °C.
SonGuk Pak +3 more
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Introduction: The study of Pb(Zr1-x, Tix)O3 ceramics is growing due to their wide use as piezoelectric materials. PZT piezoelectric ceramics are a solid solution of ferroelectric PT(PbTiO3) with Curie temperature 490 °C and antiferroelectric PZ(PbZrO3) with Curie temperature 230 °C.
SonGuk Pak +3 more
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Effective coefficients of electromechanical coupling in piezoceramic bodies
Soviet Applied Mechanics, 1980openaire +1 more source