Uses of acetone air-sensitive material

Abstract

The invention discloses an acetone air sensitive material and the application of the same, relating to an air sensitive material for detecting acetone steam and the application of the same. The invention solves the problems that the prior acetone air sensitive material can not response to acetone gas selectively due to the existence of ethanol and normal propyl alcohol, and has high minimal detection limit to the acetone. The general expression of the acetone air sensitive material of the invention is A1-xA' xB1-yB' yO3, wherein, A is La or Nd; A' is Sr, Sm, Ce or Pb; B is Cr, Ni, Fe or Co; B'is Ti, Mn, Mg or Cu; x is more than or equal to 0 and less than or equal to 1, y is more than or equal to 0 and less than or equal to 1, x and y are not simultaneously 0 or 1, and when one of x and yis 0, the other is not 1. The acetone air sensitive material of the invention is used as thick-film sensitive element; according to the ratio of the portion by weight, the thick film of the thick-film sensitive element is made by 84 to 92 portions of acetone air sensitive materials, 4 to 8 portions of glass powder and 4 to 8 portions of terpilenol. The acetone air sensitive material of the invention decreases the detecting viscosity of the acetone gas, is not interfered by the wetness of the environment, and is of good selectivity for the acetone gas.

Description

technical field [0001] The invention relates to a gas sensitive material for detecting acetone vapor and its application. Background technique [0002] At present, the research on oxides as sensitive materials for acetone vapor mainly focuses on doping ZnO, SnO 2 , Ga 2 o 3 , CeO 2 , SrTiO 3 , NiO, CdIn 2 o 4 and other materials, in which the obtained WO after doping 3 -ZnO and MoO 3 - When the measurement temperature of ZnO is 500°C, the sensitivity to acetone gas with a concentration of 20ppm can reach about 60, the response time is not longer than 30 seconds, and the recovery time is within 20 seconds. CdIn 2 o 4 When the working temperature is 350°C, the sensitivity to 1000ppm acetone gas reaches about 6, and the response recovery time is 10 seconds and 15 seconds respectively. through Eu 2 o 3 Modified SnO 2 Thin film, when working at 185°C, the sensitivity to 1000ppm acetone gas is above 8. However, due to the very similar properties of ethanol, n-propan...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing acetone gas-sensitive material cannot selectively respond to acetone gas due to the existence of ethanol and n-propanol, and the minimum detection limit of acetone is high; and provide an acetone gas-sensitive material and its application

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