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Preparation and Performance of Ni-YSZ/YSZ Co-Ceramic Using Multiple Gel-Tape Casting

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Abstract:

Use starch, corn meal and activated carbon as pore-making agent, Ni-YSZ/YSZ composite ceramic green body was prepared by multiple gel-tape casting with acryloyl ammonium-polyvinyl alcohol. The specimen was sintered at 1450°C for 4h, then reduced in hydrogen atmosphere at 800°C for 4h, Ni-YSZ/YSZ composite ceramic disk was obtained, the porosity, thermal expansion coefficient, electrical properties and microstructures of the specimen was tested. The results showed that the porosity of Ni-YSZ/YSZ composite ceramic disk reaches about 30% when use starch as pore-making agent, expansion coefficient is proportional to porosity, both of them reduced with the temperature increased. The YSZ is continued and compact with network structure, Ni particulates are well distributed in it, suitable for intermediate temperature solid oxide fuel cell anode materials. Image analysis of SEM micrograph showed that the structure is loose, porous, uniform and compact in Ni/YSZ/YSZ multi-layer composite ceramics, which meet the requirement of intermediate temperature SOFC.

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Periodical:

Key Engineering Materials (Volumes 512-515)

Pages:

1555-1558

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.512-515.1555

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Online since:

June 2012

Authors:

Zhong Zhou Yi, Feng Rui Zhai, Hong Tian, Zhi Peng Xie

Keywords:

Electrical Properties, Gel-Tape Casting, Microstructure, Ni-YSZ/YSZ

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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