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  1. No Access

    Article

    Admittance spectroscopy and electrical properties of Co3O4-doped ZnO

    The varistor characteristics of 0.1–3.0 at. % Co-doped ZnO have been investigated. Three kinds of deep bulk trap levels of 0.16, 0.25, and ~0.31 eV were identified as donor levels by admittance spectroscopy. O...

    Youn-Woo Hong, Young-** Lee, Sei-Ki Kim, Jong-Hoo Paik… in Electronic Materials Letters (2014)

  2. No Access

    Article

    Improved dielectric properties of BaTiO3-added CaCu3Ti4O12 polycrystalline ceramics

    The effects of the BaTiO3 (BTO) additive on the electrical properties of CaCu3Ti4O12 (CCTO) polycrystalline ceramics were systematically investigated. Various amounts of BTO powder up to 15 mol. % were added to C...

    Hui Eun Kim, Soon-Mi Choi, Sung-Yun Lee, Youn-Woo Hong… in Electronic Materials Letters (2013)

  3. No Access

    Article

    Invited paper: Dielectric properties of CaCu3Ti4O12 polycrystalline ceramics

    We investigated the relationship between the microstructures and dielectric properties of various CaCu3Ti4O12 (CCTO) polycrystalline ceramics sintered in air. An abrupt increase in the dielectric constant (ɛ ...

    Sung Yun Lee, Youn Woo Hong, Sang Im Yoo in Electronic Materials Letters (2011)