Journal
JOURNAL OF THERMAL SPRAY TECHNOLOGY
Volume 26, Issue 4, Pages 728-734Publisher
SPRINGER
DOI: 10.1007/s11666-017-0536-7
Keywords
acetone; gas sensor; suspension plasma spray; ZnFe2O4
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Funding
- Jiangsu Natural Science Foundation of China [BK20140487]
- Natural Science Foundation of China [51402255]
- Cooperation Funding of Yangzhou City-Yangzhou University [YZ2016254]
- Six Talent Peaks Project in Jiangsu Province [JXQC-031]
- Testing Center of Yangzhou University
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Zinc ferrite (ZnFe2O4) sensitive coatings have been deposited by suspension plasma spraying. The phase constitution of the coatings was characterized by x-ray diffraction while the top surface and cross-sectional morphology of the coatings were inspected by scanning electron microscopy. The response to acetone was tested with the concentration in the range of 25-500 ppm at the working temperature from 175 to 275 A degrees C. The sensors that were deposited at an arc current of 400 A showed better performance than those at 600 A owing to small grain size and high porosity. The sensor response increased with acetone concentration. The optimized sensors showed excellent response/recovery time and selectivity to acetone at 200 A degrees C.
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