Combustion Synthesis of La_0.65Sr_0.35MnO₃ and its Sensing Properties for NO₂

Abstract:

In this paper, La_0.65Sr_0.35MnO₃ (LSM) oxide powder with ultrafine structure has been synthesized by self-propagating combustion method. The powders were characterized by X-ray diffraction, scanning electron microscopy and laser size analysis. Compared to the powders prepared by traditional solid-phase method, the grain size of powders prepared by self-propagating combustion method is relatively small and uniform. Starting from ultrafine LSM powders, sensing electrode (SE) for NO₂ mixed-potential sensors based on yttria-stablized zirconia (YSZ) was fabricated. As-obtained NO₂ sensor displays fast response and high sensitivity (25.4mV/decade). The response values of the sensor have good linear relationship with the logarithm of NO₂ concentration varying from 30ppm to 500ppm.Keywords:Self-propagating combustion method; La_0.65Sr_0.35MnO₃; NOx sensor; YSZ

• Periodical: Key Engineering Materials (Volume 680)
• Pages: 208-211
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.680.208
• Online since: February 2016
• Authors: Lian Lian Wu, Qiang Li*, Dan Yu Jiang, Jin Feng Xia
• Keywords: La_0.65Sr_0.35MnO₃, NOx Sensor, Self-Propagating Combustion Method, YSZ

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