Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Stabilization of the Perovskite Phase and Dielectric Properties in the System $Pb(Zn_{1/3}Nb_{2/3})O_3-Pb(Fe_{1/2}Nb_{1/2})O_3$

$Pb(Zn_{1/3}Nb_{2/3})O_3-Pb(Fe_{1/2}Nb_{1/2})O_3$계에서의 Perovskite상의 안정성 및 유전특성

  • 김정욱 (한양대학교 무기재료공학과) ;
  • 최성철 (한양대학교 무기재료공학과) ;
  • 이응상 (한양대학교 무기재료공학과)
  • Published : 1995.03.01
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Abstract

Stabilization of the perovskite phase and sequence of reactions occuring during calcination were studied with solid solutions formed between Pb(Zn1/3Nb2/3)O3 and Pb(Fe1/2Nb1/2)O3. In the PZN-PFN composition of equal molar ratio, rhombohedral type pyrochlore phase (Pb2Nb2O7) and PbO-rich distorted cubic type pyrochlore phase (Pb3Nb2O8) were coexisted as intermediate phases at temperatures below 85$0^{\circ}C$, and these phases transformed to a stable cubic type pyrochlore phase, Pb3Nb4O13 solid solution and a perovskite solid solution at temperatures above 85$0^{\circ}C$. The major stable phase as increasing sintering temperatures was a perovskite phase in this binary system and prominent suppression of the pyrochlore phase was achieved by substituting Zn2+ with Fe3+ or by increasing sintering temperature. The composition containing 20mol% PZN possessed the best dielectric properties, and the dissipation factor was lower than 5% in all compositions.

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References

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