Development of magnetic-field-driven micro-gas valve

Teiko Okazaki, Masamune Tanaka, Naoki Ogasawara, Yasubumi Furuya, Chihiro Saito, Nobuo Imaizumi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Giant magnetostrictive Fe-Pd and Fe-Ga alloys are promising as actuator/sensor materials with high respective velocity and stress created by magnetostriction. To apply them to a micro-gas valve, we developed magnetostrictive actuators, that is, Fe80Ga20/Ni and Fe70.4Pd29.6/Ni bimorph layers. These cantilever-type actuators can be bent by applying magnetic field parallel to length. An actuator point displaced about 300 μm under a low magnetic field of 37 kAm -1. Small and large actuators were applied to a micro-gas valve. The opening and closing action of a gas valve consisting of magnetostrictive bimorph layers can be controlled remotely by magnetic fields. Gas flow rate can be driven from 50 to OmL-min-1 by increasing the magnetic field to 40 kAm-1. The response time to the applied magnetic field is below 0.15s.

Original languageEnglish
Pages (from-to)461-466
Number of pages6
JournalMaterials Transactions
Issue number3
Publication statusPublished - 2009 Mar
Externally publishedYes


  • Actuator
  • Bimorph layers
  • Magnetostriction
  • Micro-gas valve

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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