Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of Excess MgO on Dielectric and Electrostrictive Properties of $0.99Pb(Mg_{1/3}Nb_{2/3})O_3-0.01Pb(Mn_{2/3}W_{1/3})O_3$

$0.99Pb(Mg_{1/3}Nb_{2/3})O_3-0.01Pb(Mn_{2/3}W_{1/3})O_3$계의 유전 및 전왜 특성에 미치는 과잉 MgO의 영향

  • 윤기현 (연세대학교 공과대학 세라믹공학과) ;
  • 김승연 (연세대학교 공과대학 세라믹공학과) ;
  • 남윤우 (연세대학교 공과대학 세라믹공학과) ;
  • 조용수 (연세대학교 공과대학 세라믹공학과) ;
  • 강동헌 (수원대학교 공과대학 전자재료공학과)
  • Published : 1993.08.01
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Abstract

Dielectric and electrostrictive properties of 0.99Pb(Mg1/3Nb2/3)O3-0.01Pb(Mn2/3W1/3)O3 system using KCl-NaCl salts have been investigated as a function of the amount of excess MgO. For the specimens calcined at $700^{\circ}C$ for 1h and then sintered at 115$0^{\circ}C$ for 4h, the perovskite phase and the relative density were about 98% and 95%, respectively. With the addition of excess MgO up to 10mol%, the dielectric constant and the electrostrictive strain increased due to the increase of density and grain size, and these properties were degraded by the further addition of excess MgO. For the 10mol% excess MgO added specimen, the maximum electrostrictive strain, Xmax, and the electrostrictive coefficient, Q11, were 4.5$\times$10-4, 3.5$\times$10-2m4/C2, respectively. These results were correlated with the property of PMW and microstructure.

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References

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