Improved Fracture Strength of 5YSZ/Al₂O₃ Composite Matrix by Addition of SiO₂ for Planar Automotive Oxygen Sensor

Abstract:

As the ceramic substrate materials in automobile oxygen sensor, 5YSZ/Al₂O₃ matrix composite ceramic with different amount of silica are prepared by ball-milling,tape casting and sintering.They are investigated for their microstructure and mechanical properties.The microstructure of the sample is analyzed by Scanning Electron Microscopy (SEM) and Energy Dispersive X-Ray Spectroscopy (EDX).Fracture strength is measured by ring-on-ring method. It is found that adding 1 wt.% SiO₂ into 5YSZ/Al₂O₃ matrix can improve the strength of composite ceramics.

• Periodical: Key Engineering Materials (Volume 768)
• Pages: 97-101
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.768.97
• Online since: April 2018
• Authors: Wu Lei, Ben Ma*, Jian Pu, Chi Bo, Li Jian
• Keywords: 5YSZ/Al₂O₃, Composite Ceramic, Fracture Strength, Planar Automotive Oxygen Sensor, Ring-on-Ring Method

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