Thick film material for acetone gas sensitive element, preparation method and acetone gas sensitive element

The invention provides a thick film material for an acetone gas sensitive element, a preparation method and the acetone gas sensitive element, and belongs to the field of gas sensitive sensors. The preparation method of the thick film material comprises the following steps: preparing a precursor from zinc acetate dihydrate, cerium nitrate hexahydrate, ammonia water and DMP-30 at normal temperature, placing the precursor in a high-pressure kettle for reaction, grinding the reaction precipitate and deionized water to prepare pasty slurry, coating the surface of a gas sensitive element with the pasty slurry, and performing annealing and aging to obtain the thick film material. According to the invention, growth of ZnO crystal grains is inhibited through a doping process, and the specific surface area is increased; meanwhile, DMP-30 is quantitatively added, the crystal grain size of zinc oxide is further reduced, after high-temperature annealing, ethidene diamine is decomposed to generate gas, the porosity of the