THERMAL CHARACTERIZATION OF SYNTHESIZED Y2O3-CEO2-ZRO2

被引：5

作者：

DUH, JG ^{[1
]}

LEE, MY ^{[1
]}

CHIOU, BS ^{[1
]}

机构：

[1] NATL CHIAO TUNG UNIV,INST ELECTR,HSINCHU 30039,TAIWAN

来源：

MATERIALS CHEMISTRY AND PHYSICS | 1990年 / 24卷 / 05期

关键词：

Powder Characteristics - Tetragonal Phase Stabilization - Zirconia Polycrystal Synthesis;

D O I：

10.1016/0254-0584(90)90139-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Fine powders of CeO2-stabilized tetragonal zirconia polycrystal (Ce-TZP) with and without Y2O3 dopants were fabricated through a coprecipitation process. The powder characteristics were evaluated by thermal differential analysis (DTA), thermogravimetric analysis (TGA), infrared spectra (IR) and X-ray diffraction. CeO2 doping reduces the phase transformation temperature and significantly stabilizes the tetragonal phase. IR spectra imply that OH group is not closely related to the formation of metastable tetragonal phase. Size effect may, however, play a role in stabilizing the tetragonal phase. No appreciable distinction between undoped and Y2O3-doped Ce-TZP powders was observed in either DTA or TGA thermograms. The DTA thermogram for the alcohol-washed gel exhibits rather complicated exothermic peaks as compared to the as-synthesized coprecipitates. It is argued that this difference is attributed to the interaction between CeO2 and ethyl alcohol during the fabrication process. © 1990.

引用

页码：511 / 523

页数：13

共 23 条

[1] DEHYDRATION OF SYNTHESIZED CALCIA-STABILIZED ZIRCONIA FROM A COPRECIPITATION PROCESS [J].