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논문 기본 정보

자료유형
학술저널
저자정보
김인호 (전남대학교) Bhupendra Singh (Banaras Hindu University) 임지원 (전남대학교) 송선주 (Banaras Hindu University)
저널정보
한양대학교 세라믹공정연구센터 Journal of Ceramic Processing Research Journal of Ceramic Processing Research 제19권 제2호
발행연도
2018.4
수록면
134 - 141 (8page)

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In this work, yttrium stabilized zirconia (YSZ) was synthesized using zirconium oxychloride (ZOC) which was extracted fromhigh-grade zircon sand mine in Indonesia. The ZOC was extracted from the zircon sand by caustic fusion method which wasused to prepare 8 mole% yttrium doped zirconia (YSZ8) powder with average particle diameter of 422 nm by co-precipitationmethod. The powder was then granulated to ~15 μm granules by spray drying process and the granules were used to fabricatedense sintered body. The sintering temperature of 1600 oC was determined by monitoring the relative shrinkage rate withtemperature.<ed-check the technical meaning> The prepared materials were analyzed by X-ray diffraction (XRD), particlesize distribution and Inductively coupled plasma mass spectrometry (ICP-MS), and scanning electron microscopy (SEM). TheXRD indicated that the sintered YSZ8 has a cubic structure. Total electrical conductivity of the sintered YSZ specimen wascalculated in 700-900 oC and 0.21 ≤(pO2/atm)≤ 10?19 range by DC 4-probe method. The materials showed a maximumconductivity of 7.78 × 10?2 S.cm?1 at 900 oC with an activation energy of 0.83 ± 0.02 eV and the conductivity was lower thancommercial 8YSZ at various temperature. The Hebb-Wagner polarization experiments were performed to measure partialelectronic conductivity. The activation energies for conduction of holes and electrons were 1.48 ± 0.02 and 4.98 ± 0.94 eV,respectively. The electrolyte domain for YSZ8 was determined.

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