Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/636
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dc.contributorDepartment of Applied Physics-
dc.contributorMaterials Research Centre-
dc.creatorGuo, M-
dc.creatorLin, D-
dc.creatorLam, KH-
dc.creatorWang, S-
dc.creatorChan, HLW-
dc.creatorZhao, X-
dc.date.accessioned2014-12-11T08:28:18Z-
dc.date.available2014-12-11T08:28:18Z-
dc.identifier.issn0034-6748-
dc.identifier.urihttp://hdl.handle.net/10397/636-
dc.language.isoenen_US
dc.publisherAmerican Institute of Physicsen_US
dc.rights© 2007 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in M. Guo et al., Rev. Sci. Instrum. 78, 035102 (2007) and may be found at http://link.aip.org/link/?rsi/78/035102.en_US
dc.subjectPiezoelectric devicesen_US
dc.subjectTransformersen_US
dc.subjectPotassium compoundsen_US
dc.subjectSodium compoundsen_US
dc.subjectVibrationsen_US
dc.subjectCeramicsen_US
dc.titleA lead-free piezoelectric transformer in radial vibration modesen_US
dc.typeJournal/Magazine Articleen_US
dc.description.otherinformationAuthor name used in this publication: D. M. Linen_US
dc.description.otherinformationAuthor name used in this publication: K. H. Lamen_US
dc.description.otherinformationAuthor name used in this publication: S. Wangen_US
dc.description.otherinformationAuthor name used in this publication: X. Z. Zhaoen_US
dc.identifier.spage1-
dc.identifier.epage5-
dc.identifier.volume78-
dcterms.abstractIn this study, a disk-shaped piezoelectric transformer was fabricated using lead-free (K,Na)NbO₃-based ceramics with high mechanical quality factor. The transformer can operate in the fundamental or the third radial vibration mode. The transformer is poled along the thickness direction. The top surface is covered by ring/dot silver electrodes separated by an annular gap which serve as the input and output parts of the transformer, respectively. The bottom surface, fully covered with a silver electrode, is grounded as a common electrode. The dimensions of the top ring/dot electrodes are designed such that the third radial vibration mode can be strongly excited. The electrical properties of the transformer with diameter of 34.2 mm and thickness of 1.9 mm were measured. For a temperature rise of 35°C, the transformer has a maximum output power of 12 W. With the matching load, its maximum efficiency is >95%, and maximum voltage gains are 6.5 and 3.9 for the fundamental and the third radial vibration modes, respectively. It has potential to be used in power supply units and other electronic circuits.-
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitationReview of scientific instruments, 9 Mar. 2007, v. 78, 035102, p. 1-5-
dcterms.isPartOfReview of scientific instruments-
dcterms.issued2007-03-09-
dc.identifier.isiWOS:000245320800043-
dc.identifier.scopus2-s2.0-34047100348-
dc.identifier.eissn1089-7623-
dc.identifier.rosgroupidr32114-
dc.description.ros2006-2007 > Academic research: refereed > Publication in refereed journal-
dc.description.oaVersion of Recorden_US
dc.identifier.FolderNumberOA_IR/PIRAen_US
dc.description.pubStatusPublisheden_US
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