| $3Y-ZrO_2$와 $8Y-ZrO_2$ 분말의 혼합비율에 따른 테이프 캐스트된 지르코니아 박판의 전기적 성질의 변화 |
| 김선재, 강대갑, 김경호, 정충환, 박지연 |
| 한국원자력연구소 정밀요업재료 개발팀 |
| Electrical Properties of Tape-Cast Zirconia Thin Plates with the Mixing Ratios of $3Y-ZrO_2$ and $8Y-ZrO_2$ Powders |
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| ABSTRACT |
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After adding 8Y-ZrO2 powders to 3Y-ZrO2 powders at ratios of 0, 33, 50, 67, and 100% by weight, the mixed yttria-stabilized zirconia specimens were fabricated into thin plate using tape~casting method and then sintered at 150$0^{circ}C$ for 4h in air. The crystalline structure, microstructure and electrical properties of the sintered zirconia thin plates were investigated by using X-ray diffractometer, scanning electron microscope and impedance analyser, respectively. At the temperatures higher than 75$0^{circ}C$, the sintered thin plate with 33% 8Y-ZrO2 content shows higher mechanical properties and lower electrical resistivity than 8Y-ZrO2 thin plate which is generally used as an electrolyte for solid oxide fuel cells. This is due to the fact that the zirconia thin plates with low 8Y-ZrO2 content maintain the slope of low temperature region up to high temperatures, whereas at temperatures higher than 50$0^{circ}C$ the slope decrease in the zirconia thin plates with high 8Y-ZrO2 content. |
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