• 제목/요약/키워드: $SrTiO^3$

검색결과 1,052건 처리시간 0.032초

Laser Ablation용 (Ba,Sr)$TiO_3$ 타겟의 구조 및 유전특성에 관한 연구 (A Study on Structural and Dielectric Properties of the (Ba, Sr)$TiO_3$ Targets for Laser Ablation)

  • 홍상기;김성구;마석범;장낙원;최형욱;박창엽
    • 한국전기전자재료학회:학술대회논문집
    • /
    • 한국전기전자재료학회 1998년도 추계학술대회 논문집
    • /
    • pp.37-40
    • /
    • 1998

  • (Ba.Sr)TiO$_3$(BST) ceramics were fabricated with different Ba/Sr ratios and the str dielectric properties of the BST bulk ceramics were investigated. As the Ba/sr ratios dielectric constant decreased. (Ba$_{0.7}$Sr$_{0.3}$)TiO$_3$ (BST(70/30)) showed a maximum dielec value of $\varepsilon$$_{r}$=8.856, this showed that the decrease of Ba/Sr ratios had made BST thin dielectrics. Targets were fabricated and made into film by PLD process and the thin film by PLD process have good stoichiometry with the targets.rgets.

  • PDF

BST 세라믹 저온소결에 $Li_2CO_3$와 ZnBO가 미치는 영향 (Effective of $Li_2CO_3$ and ZnBO for low temperature sintered $(Ba_{0.5},Sr_{0.5})TiO_3$ ceramics)

  • 김세호;유희욱;구상모;하재근;이영희;고중혁
    • 한국전기전자재료학회:학술대회논문집
    • /
    • 한국전기전자재료학회 2007년도 하계학술대회 논문집 Vol.8
    • /
    • pp.297-297
    • /
    • 2007

  • The $(B_{0.5},Sr_{0.5})TiO_3$ ceramics, which added with low sintering materials $Li_2CO_3$ and ZnBO, was investigated for LTCC(low temperature co-fired ceramic) applications. To compare sintering temperature of $(B_{0.5},Sr_{0.5})TiO_3$ respectively, we added 1, 2, 3, 4, and 5wt% of $Li_2CO_3$ and ZnBO to $(B_{0.5},Sr_{0.5})TiO_3$. For confirming the sintering temperature, the respective specimens were sintered from $750^{\circ}C$ to $1200^{\circ}C$ by $50^{\circ}C$. The case of $Li_2CO_3$ greatly lowered the sintering temperature of $(B_{0.5},Sr_{0.5})TiO_3$ ($1350^{\circ}C$) below $900^{\circ}C$. The addition of ZnBO improved the loss tangent of $(B_{0.5},Sr_{0.5})TiO_3$. The crystalline structure of $LiCO_3$ doped $(B_{0.5},Sr_{0.5})TiO_3$ and ZnBO doped $(B_{0.5},Sr_{0.5})TiO_3$ was analyzed with the X-ray diffraction (XRD) analysis. The dielectric permittivity and loss tangent of $Li_2CO_3$ doped BST and ZnBO doped BST were measured with the HP 4284A precision. From the electrical characterization, we respectively obtained the dielectric permittivity 1361, loss tangent $6.94{\times}10^{-3}$ at $Li_2CO_3$ doped $(B_{0.5},Sr_{0.5})TiO_3$ (3wt%) and the dielectric constant 1180, loss tangent $3.70{\times}10^{-3}$ at ZnBO doped $(B_{0.5},Sr_{0.5})TiO_3$(5wt%).

  • PDF