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A liquefied petroleum gas (LPG) sensor with high selectivity,sensitivity and low power consumption has been developed based on indium oxide with very low resistance.Nanocrystalline In_2O_3 gas sensing materials were directly syn- thesized through a one-step controllable solvothermal process at 210℃for 24 h,using InCl_3.4H_2O as the starting material, cetyltrimethyl ammonium bromide (CTAB) as additive and ethanol as the solvent.The obtained samples were characterized by X-ray diffraction (XRD),and transmission electron microscopy (TEM).The results showed that indium oxide takes on uniform cubic shape with range size of 10～30 nm and fine dispersivity.Gas sensitivity was measured in a mixing static gas. The results indicated that 3.0 V is the best working voltage of the sensor to LPG.Sensitivity is 12.6.The response-time and recovery-time are 3 s and 10 s respectively.Power consumption is only around 200 mW.
A liquefied petroleum gas (LPG) sensor with high selectivity, sensitivity and low power consumption has been developed based on indium oxide with very low resistance. Nanocrystalline In 2 O 3 gas sensing materials were directly syn- theized through a one-step controllable solvothermal process at 210 ° C. for 24 h, using InCl_3.4H_2O as the starting material, cetyltrimethyl ammonium bromide (CTAB) as additive and ethanol as the solvent. The obtained samples were characterized by X-ray diffraction (XRD), and transmission electron microscopy (TEM) results showed that indium oxide takes on uniform cubic shape with range size of 10 ~ 30 nm and fine dispersivity. Gas sensitivity was measured in a mixing static gas. is 12.6. The response-time and recovery-time are 3 s and 10 s respectively. Power consumption is only around 200 mW.