• 제목/요약/키워드: $LiCoO_{2}$

검색결과 701건 처리시간 0.027초

Mn 첨가량 변화에 따른 Tb/Mn이 첨가된 화학양론조성 LiNbO3 단결정의 광학적 특성 (Optical Properties of Stoichiometric Tb/Mn Co-doped LiNbO3 Single Crystals Dependent on Mn Concentration)

  • 이성문;신동익;김근영;백승욱;윤대호
    • 한국세라믹학회지
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    • 제41권1호
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    • pp.92-95
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    • 2004

  • Micro-Pulling Down (${\mu}$-PD) 법을 이용하여 $MnO_2$와 $Tb_4O_7$를 첨가하여 crack. 열 strain 등의 결함이 없는 화학양론조성의 $LiNbO_3$ 단결정을 c-축으로 직경 1.0mm, 길이 25-30mm의 크기로 성장시켰다. Electron Probe Micro Analysis (EPMA)를 이용하여 결정 내에 $MnO_2$와 $Tb_4O_7$이 균일하게 분포되어 있음을 확인하였다. 또한 Fourier Transform-Infrared Spectrophotometer (FT-IR)을 사용하여 OH 흡수밴드를 관찰하였고, 성장된 결정의 $MnO_2$와 $Tb_4O_7$ 첨가에 따른 형광특성의 변화를 측정하였다.

  • https://doi.org/10.4191/KCERS.2004.41.1.092 인용 PDF KSCI

BST Tunable 후막 유전체의 소결과 유전 특성엘 관한 연구 (A study on the sintering condition and Electric properties of BST thick film)

  • 김인성;민복기;송재성;전소현
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2005년도 제36회 하계학술대회 논문집 C
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    • pp.2013-2015
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    • 2005

  • In this paper, Effect of $BaSrTiO_3/Li_2CO_3$ on low temperature sintering and dielectric property of thick films has been investigated for variable capacitor on high frequency. The thick films were fabricated by the tape casting and then the structural and dielectric properties as a function of an addition composition ratio and sintering temperature were studied. For the thick film sintered at $1050^{\circ}C$, it was densified to 96% of $BaSrTiO_3$ theoretical density by the addition of 10 $wt{\cdot}%$ $BaSrTiO_3/Li_2CO_3$. Dielectric constant increased and Curie temperature lowered with the increased of $BaSrTiO_3/Li_2CO_3$ content, which probably can be explained by the substitution of $Ba^{3+},Li^{1+}$ on $RaTiO_3$ lattice. The tunability and dielectric loss of the $BaSrTiO_3/Li_2CO_3$ thick film, sintered at $1350^{\circ}C$, were about 26% and 0.234 at $10{\sim}15MHz$, respectively.

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