Thermal Stability Behaviour of Scandia Stabilised Zirconia

C. K. Ng, S. Ramesh, C. Y. Tan, Andanastuti Muchtar, Mahendra Rao Somalu, W. S. Samuel Lew, C. H. Ting, Y. D. Chuah, U. Sutharsini

Research output: Contribution to journalConference article

Abstract

Solid Oxide Fuel Cells (SOFCs) are emerging as an advanced and efficient energy conversion technology that could be a solution to some of the environmental issues. SOFCs are able to produce clean electricity and heat from hydrogen energy. Due to their high ionic conductivity in the intermediate temperature range of 600 °C to 800 °C, scandia stabilized zirconia is a very promising electrolyte material for SOFCs. However, the long term damage caused by cyclic heating and cooling during the stages of start-up and shut down of SOFC will greatly affect the performance of the fuel cell. The structural damages will result in poor mechanical properties which directly influence the durability of the ceramic electrolyte. Therefore, it is essential to investigate the thermal degradation behavior of various zirconia ceramic systems. In this work, the thermal degradation behavior of the zirconia ceramics are investigated by adopting thermal cycling test at two different heating rates (10°C/min and 20°C/min) to examine the durability of the zirconia electrolyte, in particular the structure degradation caused in thermal cycling. Ordered array of convex meniscus were observed on the surface of the undoped zirconia ceramics and the grain growth was suppressed during thermal cycling. The effect of thermal cycling on the mechanical stability of zirconia based ceramics were affected by the addition of 1 wt% MnO2 which showed a reduction in the hardness and fracture toughness.

Original languageEnglish
Article number012078
JournalIOP Conference Series: Earth and Environmental Science
Volume268
Issue number1
DOIs
Publication statusPublished - 2 Jul 2019
EventInternational Conference on Sustainable Energy and Green Technology 2018, SEGT 2018 - Kuala Lumpur, Malaysia
Duration: 11 Dec 201814 Dec 2018

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scandium
fuel cell
ceramics
oxide
electrolyte
durability
degradation
heating
damage
fracture toughness
environmental issue
hardness
mechanical property
electricity
conductivity
hydrogen
cooling
energy

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

Cite this

Thermal Stability Behaviour of Scandia Stabilised Zirconia. / Ng, C. K.; Ramesh, S.; Tan, C. Y.; Muchtar, Andanastuti; Somalu, Mahendra Rao; Samuel Lew, W. S.; Ting, C. H.; Chuah, Y. D.; Sutharsini, U.

In: IOP Conference Series: Earth and Environmental Science, Vol. 268, No. 1, 012078, 02.07.2019.

Research output: Contribution to journalConference article

Ng, C. K. ; Ramesh, S. ; Tan, C. Y. ; Muchtar, Andanastuti ; Somalu, Mahendra Rao ; Samuel Lew, W. S. ; Ting, C. H. ; Chuah, Y. D. ; Sutharsini, U. / Thermal Stability Behaviour of Scandia Stabilised Zirconia. In: IOP Conference Series: Earth and Environmental Science. 2019 ; Vol. 268, No. 1.
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