Fabrication of c-axis-oriented potassium strontium niobate (KSr2Nb5O15) ceramics by a rotating magnetic field and electrical property

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  • TANAKA Satoshi
    Department of Materials Science and Technology, Nagaoka University of Technology
  • TAKAHASHI Takuma
    Department of Materials Science and Technology, Nagaoka University of Technology
  • FURUSHIMA Ryoichi
    Department of Materials Science and Technology, Nagaoka University of Technology
  • MAKIYA Atsushi
    Department of Materials Science and Technology, Nagaoka University of Technology
  • UEMATSU Keizo
    Department of Materials Science and Technology, Nagaoka University of Technology

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Fabrication and property of c-axis-oriented KSr2Nb5O15 (KSN) ceramics were examined. Particle-oriented KSN was fabricated by using a rotating magnetic field and subsequent sintering. KSN fine powder was prepared by conventional solid-state reaction and grinding processing. C-axis-oriented KSN green compact was fabricated in a rotating magnetic field 10 Tesla. The resulting green body was sintered at 1473 K for 6 h and then at 1525 K for 2 h to prevent exaggerated grain growth. C-axis-oriented KSN ceramics with relative density 92% was obtained. In XRD, peaks from the c-planes, such as 001 and 002, were very strong at the horizontal cross section of the sintered specimens. The ferroelectric and piezoelectric property along to c-axis was also improved to 21 µC/cm2 and d33 = 101 pC/N by orientation structure.

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