Piezoelectrically actuated ejector using PMN-PT single crystal

Kwok Ho Lam, H. L.W. Chan, H. S. Luo, Q. R. Yin, Z. W. Yin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

21 Citations (Scopus)


A piezoelectric fluid ejector has been fabricated using a Pb(Mg1/3Nb2/3)O3-0.35PbTiO3(PMN-PT) single crystal ring. The design of the ejector is based on resonant modes of a flextensional transducer that is constructed by bonding a PMN-PT ring to a thin circular metal membrane with a small orifice at the centre. The fluid is placed, at atmospheric pressure, behind one face of the membrane. By applying an appropriate voltage to the PMN-PT ring, a continuous or drop-on-demand ejection of ink or water can be achieved. With the PMN-PT single crystal as the driving element, the ejector has a very high axial displacement and can be driven at a low voltage. The performance of the PMN-PT single crystal ejector has been compared with the ejector fabricated using PZT ceramics and is formed to have better performance.
Original languageEnglish
Pages (from-to)197-202
Number of pages6
JournalSensors and Actuators, A: Physical
Issue number1
Publication statusPublished - 31 May 2005


  • Piezoelectric ejector
  • PMN-PT single crystal

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering


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