Nanostructured ZrO2 Thick Film Resistors as H2-Gas Sensors Operable at Room Temperature
| Autor: | K. M. GARADKAR, B. S. SHIRKE, Y. B. PATIL, D. R. PATIL |
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| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Sensors & Transducers, Vol 110, Iss 11, Pp 17-25 (2009) |
| ISSN: | 1726-5479 2306-8515 |
| Popis: | Nanostructured ZrO2 powder was synthesized by microwave assisted sol-gel method. The material was characterized by XRD and SEM techniques. X-Ray diffraction studies confirm that a combination of tetragonal and monoclinic zirconia nanoparticles is obtained by using microwave-assisted method. The nanopowder was calcined at an optimized temperature of 400 °C for 3 h. The prepared powder had crystalline size about 25 nm. Thick films of synthesized ZrO2 powder were prepared by screen printing technique. The gas sensing performances of these films for various gases were tested. Films showed highest response to H2 (50 ppm) gas at room temperature with poor responses to others (1000 ppm). The quick response and fast recovery are the main features of this sensor. The effects of microstructure, operating temperature and gas concentration on the gas response, selectivity, response time and recovery time of the sensor in the presence of H2 gas and others were studied and discussed. |
| Databáze: | OpenAIRE |
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