Effect of Polarization Treatment Time on Inhibition of Low Temperature Degradation in Y-Doped ZrO2
Effect of surface charges induced by polarization treatment on Low Temperature Degradation (LTD) in 3mol%Y-doped ZrO2 was studied. Samples were polarized by applying voltage (7kV/cm) at 200°C for various time (1~30min). LTD acceleration test was conducted using polarized samples. LTD was inhibited on negatively charged surface in all the polarized samples, which is independent on polarization time. We carried out thermally stimulated depolarization current (TSDC) analysis for investigate polarization mechanism. Two polarization elements were confirmed: orientation polarization and space charge polarization. A comparison of the result of LTD acceleration test and TSDC analysis indicates that orientation polarization is considered superior element in inhibition of LTD.
Kunio Ishikawa and Yukihide Iwamoto
Y. Tsuchiya et al., "Effect of Polarization Treatment Time on Inhibition of Low Temperature Degradation in Y-Doped ZrO2", Key Engineering Materials, Vols. 529-530, pp. 601-604, 2013