한국표면공학회지 (Journal of the Korean institute of surface engineering)

  • 제50권4호
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  • Pages.277-281
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  • 2017
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  • 1225-8024(pISSN)
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  • 2288-8403(eISSN)
한국표면공학회 (The Korean Institute of Surface Engineering)
권호 표지
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강유전체(K0.5Na0.5)NbO3의 제조 및 전기적 특성 분석

Fabrication and Electrical Propertie of the Ferroelectric (K0.5Na0.5)NbO3

  • 투고 : 2017.08.07
  • 심사 : 2017.08.25
  • 발행 : 2017.08.31
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초록

Ferroelectric ceramics are broadly used for various industrial applications. In this research, the lead-free ferroelectric ceramics of $(K_{0.5}Na_{0.5})NbO_3$ was fabricated by using the solid state synthesis. The $(K_{0.5}Na_{0.5})NbO_3$ pellets were sintered at 1200, 1150 and $1100^{\circ}C$ for 4 hours in air atmosphere. Field-emission scanning electron microscopy (FE-SEM) characterization of the sintered KNN ceramics revealed surface morphology and grain size. And we used the X-ray diffraction (XRD) for measuring the sample crystal phase. Temperature dependence of the dielectric constant was measured by using an LCR meter. The sintered at $1150^{\circ}C$ for 4 hours sample has a highest dielectric constant 6011 at Curie temperature ($T_C$) and dense structure with $2.33{\mu}m$ grain size.

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