Piezoelectric ring-morph actuators for valve application

Shuxiang Dong, Xiao Hong Du, Philippe Bouchilloux, Kenji Uchino

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


This paper presents piezoelectric ring-morph actuators designed to produce a large flexural displacement for valve actuation application. The ring-shaped piezoelectric plate in the actuator produces a radial contraction or expansion and causes the center part of the metal disc to generate a large flexural displacement. The PZT ring creates a space under the metal disc which permits it to bend with a curvature larger than that of the conventional bimorph in the axis direction of the ring-morph when the PZT ring under the metal disc contracts. A prototype with diameter of 25.4 mm and thickness of 0.55 mm could produce a total stroke (static displacement) of over 130 μm under a driving voltage of ±300 V and a load of 2 N. The maximum generative force of ring-morph actuator was about 30N.

Original languageEnglish (US)
Pages (from-to)155-161
Number of pages7
JournalJournal of Electroceramics
Issue number2
StatePublished - Aug 2002

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering
  • Materials Chemistry


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