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Journal of Materials Science

, Volume 45, Issue 12, pp 3242–3246 | Cite as

Porous yttria-stabilized zirconia ceramics with ultra-low thermal conductivity

  • LiangFa Hu
  • Chang-An WangEmail author
  • Yong Huang
Article

Abstract

Porous yttria-stabilized zirconia (ZrO2-8 mol% Y2O3, YSZ) ceramics with ultra-low thermal conductivity (as low as 0.06 W/mK) could be fabricated by tert-butyl alcohol (TBA)-based gel-casting process with low solid loadings of 10 and 15 vol%. High porosity (52–76%) and fine pores with average pore size of 0.7–1.8 μm formed after sintering at 1350–1550 °C. These air-containing pores were believed to affect the through-thickness heat transfer propagation, resulting in low thermal conductivity. The thermal conductivity of porous YSZ ceramics with different porosities fits well with computed values derived from Effective Medium Theory (EMT).

Keywords

Thermal Conductivity Compressive Strength Solid Loading Zirconium Oxychloride Experimental Thermal Conductivity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No: 90816019), the Natural High Technology Research and Development Program of China (“863” Program, Grant No: 2007AA03Z435), and State Key Development Program of Basic Research of China (“973” program, Grant No: 2006CB605207-2).

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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  1. 1.Department of Materials Science and Engineering, State Key Lab of New Ceramics and Fine ProcessingTsinghua UniversityBeijingPeople’s Republic of China

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