한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제39권2호
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  • Pages.159-163
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  • 2002
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  • 1229-7801(pISSN)
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  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
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Modified Mixed Oxide 방법에 의한 PMN-PT-BT 분말 합성 및 그의 물성에 미치는 Ag의 영향

Preparation of PMN-PT-BT Powder by Modified Mixed Oxide Method and Effect of Ag on Dielectric Properties

  • 임경란 (한국과학기술연구원 재료연구부) ;
  • 정순용 (한국과학기술연구원 재료연구부) ;
  • 김창삼 (한국과학기술연구원 재료연구부)
  • 발행 : 2002.01.01
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초록

Relaxor 유전체 물질인 PMN-PT-BT를 modified mixed oxide 공정과 단일 하소로 페로브스카이트 단일상으로 제조할 수 있는 공정을 시도하였다. PbO, Nb2O5, BaCO3 와 $TiO_2$ 대신 $Ti(OC_3H_7)_4$를, MgO 대신 $Mg(NO_3)_2$을 사용하여 볼밀로 혼합한 후 건조된 분말을 900$^{\circ}C$/2시간 하소하고, 이어서 1100$^{\circ}C$/2시간 열처리하여 얻은 소결체는 소결 밀도 7.83 g/$cm^3$, 실온 유전율 22000, 유전손실 2.5%의 우수한 유전 특성을 나타내었다. 소결조제로 Ag을 $AgNO_3$로 1.0 몰%(0.3wt%) 첨가한 경우 550$^{\circ}C$/2시간 하소한 분말은 900$^{\circ}C$/2시간 열처리로 소결밀도 7.88 g/$cm^3$, 실온 유전율 20000, 유전손실 2.4%을 나타내었다.

A single phase perovskite relaxor ferroelectric PMN-PT-BT was prepared by a single calcination and the modified mixed oxide process. It was accomplished by ball-milling PbO, $Nb_2O_5,\;Ti(OC_3H_7)_4,\;BaCO_3,\;and\;Mg(NO_3)_2$ instead of MgO, removing the solvent, and then followed by calcination at 900$^{\circ}C$ for 2h. The specimen sintered at 1100$^{\circ}C$/2h showed the sintered density of 7.83 g/$cm^3$, room temperature dielectric constant of 22000, and dielectric loss of 2.5%. Addition of 1.0 mole% (0.3 wt%) of Ag as $AgNO_3$ and followed by calcination at 550$^{\circ}C$/2h lowered the sintering temperature to 900$^{\circ}C$. It still showed the sintered density of 7.88 g/$cm^3$, room temperature dielectric constant of 20000 and dielectric loss of 2.4%.

키워드

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피인용 문헌

  1. Preparation Method of Spherical 0.9PMN-0.1PT Powder vol.39, pp.7, 2002, https://doi.org/10.4191/KCERS.2002.39.7.687
  2. Synthesis of nanocomposites of PMN-PT-BT with metal oxides via surface modification vol.17, pp.2-4, 2006, https://doi.org/10.1007/s10832-006-9387-1