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Micro Semiconductor CO Sensors Based on Indium-Doped Tin Dioxide Nanocrystalline Powders
The precursors of SnO 2 or In 2 O 3 /SnO 2 nanocrystlline powders have been prepared by the sol-precipitation method. The precursors were calcined at different temperatures to prepare SnO 2 or In 2 O 3 /SnO 2 nanocrystalline powders with different particle sizes. The nanocrystallites were examined by differential thermal analysis (DTA), X-ray diffraction (XRD) and transmission electron microscopy (TEM). And then thick film CO sensors were fabricated using prepared SnO 2 or In 2 O 3 /SnO 2doi:10.3390/s6050526 fatcat:afot33fmbrc55oxmih5ymeubc4