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Alumina is widely used as substrate material for oxygen lambda sensors. It has been reported that response properties of sensors are highly dependent on surface state of substrates. In this work, Al2O3-x%SiO2 (x = 2–30) substrates were specially prepared for TiO2 based lambda sensors for high temperature operation. Structure and surface state of prepared substrates were characterized by XRD, SEM and...
It is well known that surface state of substrates greatly influences the sensing characteristics of gas sensors. In this work, alumina (Al2O3) substrates with different distribution of surface impurity concentrations were utilized to prepare TiO2 based lambda sensors. Several methods, including XPS, XRD and SEM were employed to exam the substrate surface impurity contents, as well as the structure...
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