Thermal Stability Behaviour of Scandia Stabilised Zirconia

International Conference on Sustainable Energy and Green Technology 2018

能源学;生态环境科学

Ng, C.K.^1 ; Ramesh, S.^2 ; Tan, C.Y.^2 ; Muchtar, A.^3 ; Somalu, M.R.^4 ; Samuel Lew, W.S.^1 ; Ting, C.H.^5 ; Chuah, Y.D.^6 ; Sutharsini, U.^7

Centre for Advanced Materials, Department of Materials Engineering, Faculty of Engineering and Technology, Tunku Abdul Rahman University College, Kuala Lumpur

53300, Malaysia^1

Centre of Advanced Manufacturing and Material Processing (AMMP), Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur

50603, Malaysia^2

Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, UKM, Bangi, Selangor

43600, Malaysia^3

Fuel Cell Institute, Universiti Kebangsaan Malaysia, UKM, Bangi, Selangor

43600, Malaysia^4

Department of Mechanical and Materials and Manufacturing Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Jalan Sungai Long, Bandar Sungai Long, Cheras, Kajang

43000, Malaysia^5

Department of Mechatronics and BioMedical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Jalan Sungai Long, Bandar Sungai Long, Cheras, Kajang

43000, Malaysia^6

Department of Physics, University of Jaffna, Jaffna

40000, Sri Lanka^7

关键词: Electrolyte material;    Energy conversion technologies;    Environmental issues;    Intermediate temperatures;    Scandia stabilized zirconia;    Solid oxide fuel cells (SOFCs);    Structure degradation;    Zirconia-based ceramics;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/268/1/012078/pdf
DOI  :  10.1088/1755-1315/268/1/012078

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

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.