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Article
Sintering and optical properties of transparent ZnS ceramics by pre-heating treatment temperature
The main objective of our work is to increase transmittance in the mid infrared region by removing impurities through the pre-heating treatment of zinc sulfide (ZnS) produced by hydrothermal synthesis. The pre...
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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...
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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...
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Article
Scalable energetic-impact deposition of a mixture composed of multi-walled carbon nanotubes and silver nanoparticles
Homogeneous nanocomposite films composed of multi-walled carbon nanotubes (CNTs) and silver (Ag) nanoparticles were produced by using energetic-impact deposition (EID). The EID process of a mixture composed of...
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Article
Fabrication and Characterization of Colossal Dielectric Response of Polycrystalline Ca1-x SrxCu3Ti4O12 (0≤x≤1) Ceramics
We report the microstructures and dielectric properties of Ca1-x SrxCu3Ti4O12 (C1-xSx CTO, 0≤x≤1) ceramics sintered at the various sintering temperatures ranging from 1000 to 1060˚C in air. The linear increase in...
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Article
Molten salt synthesis of La0.8Sr0.2MnO3 powders for SOFC cathode electrode
For La0.8Sr0.2MnO3 (LSM) perovskite, used as the cathode material for solid oxide fuel cells (SOFC), it is known that the formation of a triple-phase-boundary is restrained due to the formation of a second phase ...
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Article
The changes of morphology and composition in Cu(In1−xGax)Se2 powder synthesis by solvothermal method
To prepare the thin film solar cell by the screen printing method, the synthesis of nano CIGS powder has been frequently studied. Especially, the solvothermal method is normally used in the synthesis of CIGS. ...
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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 ...