SiO2ZrO2 Thin Films as Low Temperature NO2 and O3 Sensors

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Abstract:

Thin SiO2ZrO2 films were prepared, up to 0.2 μm thick, by means of the sol–gel technology and characterized by a Scanning electron microscopy and X-ray diffraction. It is shown the presence of monoclinic, cubic and tetragonal phases of ZrO2 in the SiO2 matrix. The crystallites sizes depend on the annealing temperature of the film and amount to 35 and 56 nm for the films annealed at 773 and 973 K, respectively. The films resistance is rather sensitive to the presence of NO2 and O3 impurity in air at lower operating temperatures in the range of 30-60°C.

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81-85

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February 2015

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