Chemoresistive Gas Sensor based on SiC Thick Film: Possible Distinctive Sensing Properties Between H 2 S and SO 2

• DOI: 10.1016/j.proeng.2016.11.191
• Publication Date: 2017-01-09T09:10:13Z
• Authors: A. Gaiardo; P. Bellutti; B. Fabbri; S. Gherardi; A. Giberti; V. Guidi; N. Landini; C. Malagù; G. Pepponi; M. Valt; G. Zonta
• Keywords: 13. Climate action; Gas Sensor; High Selectivity; SiC; Silicon Carbide; SO2; Thick Film; Engineering (all); 02 engineering and technology; 0210 nano-technology; Engineering(all)

Commercially available nanosized powder of silicon carbide (named SiC), was thermally, morphologically and structurally characterized. After that, it screen-printed onto alumina substrates in order to obtain thick films be tested as functional material for conductometric gas sensors. Samples were exposed SO 2 H S, gases with high importance many application fields, the aim verifying its capability distinguishing between them. The characterization highlighted that this semiconductor type is selective sulphur dioxide (SO ), concentrations within ppm range. This interesting result found at temperatures (600-800°C), useful harsh environmental, measurements proved completely free from humidity interference. Applications such a sensor could span since plays an important role air pollution, industrial processes wine making monitoring.