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Structural Origin of Morphotropic Phase Boundary in Advanced Perovskite Ferroelectric Oxides. [PDF]
J Am Chem SocYue Y +9 more
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Disc Piezoelectric Ceramic Transformers
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2012In this contribution, we present our study on disc-shaped and homogeneously poled piezoelectric ceramic transformers working in planar-extensional vibration modes. Transformers are designed with electrodes divided into wedge, axisymmetrical ring-dot, moonie, smile, or yin-yang segments.
Jirií, Erhart +4 more
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Bar piezoelectric ceramic transformers
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2013Bar-shaped piezoelectric ceramic transformers (PTs) working in the longitudinal vibration mode (k31 mode) were studied. Two types of the transformer were designed--one with the electrode divided into two segments of different length, and one with the electrodes divided into three symmetrical segments.
Jiří, Erhart +2 more
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Piezoelectric Moduli of Piezoelectric Ceramics
Journal of the American Ceramic Society, 1996The effective piezoelectric moduli of polycrystalline piezoelectric ceramics are calculated using a straightforward averaging method (a Voigt average) and a more rigorous effective‐medium theory recently developed for piezocomposites. The effects of polarization orientation within each crystallographic domain and the shape of the domain on the ...
Ce‐Wen Nan, David R. Clarke
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Advanced Materials, 1990
Surface acoustic wave filters and delay lines are two application in electronics of piezoelectric ceramics such as LiNbO3 LiTaO3 and BaTiO3, materials which convert a mechanical stimulus into an electrical signal. The basic physics and crystal chemistry of the materials, including ferroelectric ceramics, are described and an outline for further ...
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Surface acoustic wave filters and delay lines are two application in electronics of piezoelectric ceramics such as LiNbO3 LiTaO3 and BaTiO3, materials which convert a mechanical stimulus into an electrical signal. The basic physics and crystal chemistry of the materials, including ferroelectric ceramics, are described and an outline for further ...
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Piezoelectric ceramic transformer
Ferroelectrics, 1980Abstract This paper presents a piezoelectric ceramic transformer which has a no-load alternating current voltage step-up ratio of about 150–200. The composition of the material is: ternary piezoelectric ceramics. The experimental results made on the material properties and the characteristics of transformer elements are presented. Based on the analysis
Li Long Tu, Yao Yi Jin, Mu Zhen Han
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Internal electrode piezoelectric ceramic actuator
Ferroelectrics, 1983An internal electrode multilayer piezoelectric ceramic actuator element has been investigated. An individual internal electrode has the same area as the element cross section area. It has no piezoelectric inactive part, so that it shows strain/field characteristics similar to plain piezoelectric ceramics. It can be driven by a relatively low voltage
Sadayuki Takahashi +5 more
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Journal of the American Ceramic Society, 1958
The discovery of piezoelectric effects in electrically poled barium titanate ceramic, in the early l940, was a revolutionary contribution to the electromechanical transducer art. Since then, improved barium titanate ceramics adapted to a variety of practical needs have been developed, and a number of new piezoelectric oxide‐type compounds have been ...
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The discovery of piezoelectric effects in electrically poled barium titanate ceramic, in the early l940, was a revolutionary contribution to the electromechanical transducer art. Since then, improved barium titanate ceramics adapted to a variety of practical needs have been developed, and a number of new piezoelectric oxide‐type compounds have been ...
openaire +1 more source