Characterization of protective coatings for planar automotive gas sensors
| Autor: | Roger A. Bennett, Alison Mary Wagland, Stephen Poulston, Timothy I. Hyde, Valerie Marie Renee Houel, Paolo Faraldi, Marco Federico Pidria |
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| Rok vydání: | 2005 |
| Předmět: |
Materials science
Metallurgy Metals and Alloys engineering.material Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Tetragonal crystal system X-ray photoelectron spectroscopy Coating Rutile Materials Chemistry engineering Mixed oxide Cubic zirconia Electrical and Electronic Engineering Thin film Composite material Instrumentation Yttria-stabilized zirconia |
| Zdroj: | Sensors and Actuators B: Chemical. 110:209-217 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2005.01.035 |
| Popis: | Alumina support material suitable for use as a planar automotive gas sensor support was coated in thin films of yttria-stabilised zirconia (YSZ) and titania. The morphology, composition, thickness and homogeneity of the coating was measured. The coating was applied to the ‘green’ form of a tape cast alumina substrate which was subsequently fired at 1500 °C to produce the final form of the coated alumina. The YSZ coating gave a continuous ∼5 μm thick coating with no evidence of mixed oxide formation between the YSZ and the alumina substrate. XRD indicated a face centred cubic Y doped ZrO 2 or primitive tetragonal Zr 0.9 Y 0.1 O 1.95 phase. The titania coatings were much thinner ( 2 TiO 5 ) as well as rutile titania in XRD. Spot analysis using X-ray photoelectron spectroscopy showed a fairly regular titania coverage. Atomic force microscopy analysis showed a particle size of 1–3 μm for the YSZ coating and ∼0.5 μm for titania. |
| Databáze: | OpenAIRE |
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