Long-term stabilized metal oxide-doped SnO2 sensors
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TiO2, ZrO2, and SiO2 were added in the concentration of 1 - 3 wt.% to improve long-term stability for the SnO2 thick film gas sensor. Short-term sensor resistances up to 90 h were measured to investigate the stabilization time of initial resistance in air. Long-term resistance drifts in air and in gas to 5000 ppm methane for the sensors annealed at 750 oC for 1 h and continuously heated at an operating temperature of 400 oC were also measured up to 90 days at an interval of 1 day. The long-term drifts in methane sensitivity for the three metal oxide-doped SnO2 sensors are closely related to methane sensitivity level, catalytic activity, and long-term drift in sensor resistance in air. Those stabilities are mainly discussed in terms of oxidation state and catalytic activity.
Abstract
TiO2, ZrO2, and SiO2 were added in the concentration of 1 - 3 wt.% to improve long-term stability for the SnO2 thick film gas sensor. Short-term sensor resistances up to 90 h were measured to investigate the stabilization time of initial resistance in air. Long-term resistance drifts in air and in gas to 5000 ppm methane for the sensors annealed at 750 oC for 1 h and continuously heated at an operating temperature of 400 oC were also measured up to 90 days at an interval of 1 day. The long-term drifts in methane sensitivity for the three metal oxide-doped SnO2 sensors are closely related to methane sensitivity level, catalytic activity, and long-term drift in sensor resistance in air. Those stabilities are mainly discussed in terms of oxidation state and catalytic activity.
참고문헌 (25)
- G.S. V. Coles, "Fabrication and preliminary tests on tin(IV) oxide-based gas sensors", Sensors and Actuators, 7, pp.89~96 (1985)
- N. K. Choi, "Thin film gas sensors based on tin oxide for acetonitrile", J. Kor. Sensors Soc, 13(3), pp.218~223 (2004)
- K. H. Yun, "Gas sensing characteristics of thin film SnO₂ sensors with different pretreatments", J. Kor. Sensors Soc, 15(5), pp.309~316 (2006)
- K. Ihokura, "The stannic oxide gas sensor - principles and applications", pp.147~158 (1994), CRC Press, Ann Arbor, USA
- J. Watson, "The tin oxide gas sensor and its applications", Sensors and Actuators, 5, pp.29~42 (1984)
- K. Takahata, "Tin oxide sensors - development and application", pp.39~55 (1988), Elsevier Amsterdam-Oxford-New York-Tokyo
- C. Xu, "Relationship between gas sensitivity and microstructure of porous SnO₂", J. Electrochem. Soc. Jpn, 58, pp.1143~1148 (1990)
- N. Yamazoe, "New approaches for improving semiconductor gas sensor", Sensors and Actuators B, 5, pp.7~19 (1991)
- S. D. Choi, "CH₄ sensing characteristics of K-, Ca-, Mg- impregnated SnO₂ sensors", Sensors and Actuators B, 77, pp.29~42 (1984)
- Y. Nakamura, , Proc. 2nd Int. Meeting on Chemical Sensors, pp.164~166 (1986), Bordeaux
- Y. Matsuura, , Proc. 2nd Int. Meeting on Chemical Sensors, pp.197~200 (1986), Bordeaux
- M. Matsuura, "Mechanism of gas sensitivity change with time of SnO₂ gas sensor", Sensors and Actuators, 14, pp.223~232 (1988)
- M. Matsuura, "Stabilization of SnO₂ gas sensor", Technical Digest of the 9th Sensor Symposium, pp.91~94 (1990)
- B-K Min, "SnO₂ thin film gas sensor fabricated by ion beam deposition", Sensors and Actuators B, 98, pp.239~246 (2004)
- B-K Min, "Undoped and 0.1 wt.% Ca-doped Pt-catalyzed SnO₂ sensors for CH₄ detection", Sensors and Actuators B, 108, pp.119~124 (2005)
- K. Ihokura, "The stannic oxide gas sensor - principles and applications", pp.82~83 (1994), CRC Press, Ann Arbor, USA
- C. Xu, "Grain size effects on gas sensitivity of porous SnO₂-based elements", Sensors and Actuators B, 3, pp.147~155 (1991)
- Duk-Dong Lee, "Hydrocarbon gas sensors", pp.79~99 (1994), Kodansha Tokyo
- N. Yamazoe, "Interactions of tin oxide surface with O₂, H₂O and H₂", Surface Science, 86, pp.335~344 (1979)
- A. F. Carroll, "Effect of addition to SnO₂ thin films", J. Electrochem. Soc, 123(12), pp.1889~1893 (1976)
- S. R. Morrison, "Semiconductor gas sensors", Sensors and Actuators, 2, pp.329~341 (1982)
- I. Barin, "Thermochemical data of pure substances", pp.1359~1734 (1989), VCH
- K. Ihokura, "The stannic oxide gas sensor - principles and applications", pp.72~89 (1994), CRC Press Ann Arbor, USA
- F. Brescia, "Chemistry-a modern introduction", pp.188~205 (1974), W. B. Saunders Com., Philadelphia, USA
- T. Yamamoto, "Humidity sensor using TiO₂-SnO₂ ceramics", pp.133~150 (1989), Elsevier, Amsterdam- Oxford-New York-Tokyo