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Citation: ZHAO Wei-Jie, ZHAO Hui, HUO Li-hua, GAO Shan. Oxygen-Sensing Properties of La₂CuO₄ Thick Film[J]. Chinese Journal of Applied Chemistry, ;2007, 24(12): 1409-1413. shu

Oxygen-Sensing Properties of La₂CuO₄ Thick Film

1.
Laboratory of Functional Materials, School of Chemistry and Materials Science, Heilong Jiang University, Harbin 150080

Corresponding author: HUO Li-hua,
Received Date: 30 January 2007
Available Online: 30 April 2007
Fund Project:

Perovskite-type oxide La₂CuO₄ was synthesized by the glycine-nitrate process(GNP).The thick film type oxygen-sensing element was fabricated and its oxygen-sensing properties were investigated.The sensitivity of the thick-film La₂CuO₄ decreased with the increase of the measurement temperature because the oxygen-sensing properties of La₂CuO₄ was mainly determined by the surface carrier concentration.Oxygen adsorbed on the surface of the La₂CuO₄ thick films desorbed rapidly with the increase of the measurement temperature,which resulted in decrease of the surface carrier concentration.The highest sensitivity of the thick-film La₂CuO₄ obtained at 400℃ was 29.6,much higher than that of the sintered bulk ones.The corresponding response time of the thick-film sensors to the change of oxygen partial pressure was about 4 seconds at 400℃.
- La₂CuO₄,
- thick film,
- oxygen-sensing property
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Oxygen-Sensing Properties of La₂CuO₄ Thick Film