Preparation of dense yttria stabilized zirconia ceramic by low-temperature sintering zirconium oxalate sol

作者：Liu, Tingting; Fang, Jianjun; Li, Sufang^*; Wang, Congcong; Ji, Cunlu

来源：Journal of the Ceramic Society of Japan, 2015, 123(1439): 554-560.

DOI：10.2109/jcersj2.123.554

• Zirconium oxalate sol
• Yttria stabilized zirconia ceramic
• Low-temperature sintering
• Densification
• Electrical conductivity

This article reports a novel method of sintering zirconium oxalate (ZrOC2O4) sol to prepare dense yttria stabilized zirconia (YSZ) ceramic at a low sintering temperature below 1300 degrees C. A YSZ ceramic as control group was also prepared by sintering its nano-powder. The thermal decomposition process and sinter programme of the YSZ green bodies were investigated by thermogravimetry and differential thermal analysis. The sintered ceramics showed a crystallization structure in cubic phase and the crystallite size increased with the increasing sintering temperature in the range of 550 to 1200 degrees C. For preparing dense YSZ ceramic, a zirconium oxalate sol was prepared by sol-gel method and then sintered with a temperature of 1000, 1100, 1200 and 1300 degrees C. Compared with the ceramic obtained from YSZ ceramic nano-powder, the ceramic prepared by zirconium oxalate sol exhibited an enhancement of densification with higher relative density of 98.5% and higher electrical conductivity at all test temperatures.

• 出版日期2015-7
• 单位湖南大学