Flash‐Sintering of Cubic Yttria‐Stabilized Zirconia at 750°C for Possible Use in SOFC Manufacturing

Journal of the American Ceramic Society - Tập 94 Số 2 - Trang 316-319 - 2011
Marco Cologna1, André L. G. Prette2,3, Rishi Raj1
1Department of Mechanical Engineering University of Colorado at Boulder Boulder Colorado 80309‐0427
2DIMTI, University of Trento, Italy, 38050 Trento, Italy
3Department of Mechanical Engineering, University of Colorado at Boulder, Boulder, Colorado 80309-0427

Tóm tắt

We show that cubic 8 mol% yttria (8YSZ) can be sintered at 750°C with the application of DC electrical fields; in comparison the lowest sintering temperature for 3YSZ was 850°C. Furthermore, cubic zirconia exhibits the onset of flash sintering at 30 V/cm, whereas 3YSZ begins flash sintering at 60 V/cm. However, the volume specific power dissipation for the onset of flash sintering remains similar at ∼10 mW/mm3. The easier sintering of 8YSZ is ascribed to its higher ionic conductivity.

Từ khóa


Tài liệu tham khảo

10.1016/j.mser.2008.09.003

Munir Z. A., 2006, The Effect of Electric Field and Pressure on the Synthesis and Consolidation of Materials, A Review of the Spark Plasma Sintering Method, 41, 763

Grasso S., 2009, Electric Current Activated/Assisted Sintering (ECAS), A Review of Patents 1906–2008, 10, 053001, 24pp

10.1111/j.1151-2916.1989.tb06278.x

10.1111/j.1551-2916.2010.03905.x

10.1111/j.1551-2916.2009.03102.x

10.1111/j.1551-2916.2010.04089.x

Badwal S. P. S., 1992, Zirconia‐Based Solid Electrolytes, Microstructure, Stability and Ionic conductivity, 52, 23

10.1016/j.ssi.2004.06.012

10.1111/j.1744-7402.2009.02390.x

10.1016/j.ceramint.2009.11.003

Matsui K., 2006, Sintering Kinetics at Constant rates of Heating, Effect of Alumina on the Initial Sintering Stage of Yttria Stabilized Cubic Zirconia Powders, 114, 763

10.1111/j.1151-2916.1991.tb07815.x

Matsui K., 2007, Sintering Kinetics at Isothermal Shrinkage, II. Effect of Y2O3 Concentration on the Initial Sintering Stage of Fine Zirconia Powder, 90, 443

Thông tin
Thông tin xuất bản

Journal of the American Ceramic Society

Tập 94 Số 2

316-319

Thông tin tác giả