A kind of method that block zirconia aerogels are prepared by gel accelerator of L malic acid

The invention discloses a kind of method that block zirconia aerogels are prepared by gel accelerator of L malic acid, comprise the following steps that：1) using inorganic zirconium salts as zirconium source, it is dissolved in absolute ethyl alcohol, prepares inorganic zirconium salts/ethanol solution；Gel accelerator is made with L malic acid, is dissolved in ethanol, L malic acid/ethanol solution is prepared；Stirring extremely forms the solution of water white transparency respectively；2) L prepared malic acid/ethanol solution is quickly adding into inorganic zirconium salts/ethanol solution, quick stirring is put into baking oven after sealing, obtains wet gel；3) wet gel is subjected to aging, supercritical drying processing, finally obtains block zirconia aerogels.By adjusting the ratio of inorganic zirconium salts and L malic acid, low-density (0.05 0.30g/cm can be prepared 3 ), high-specific surface area (100 1000m 2 / g), the block zirconia aerogels of high porosity (95 99%), have good application prospect in terms of catalyst and catalyst carrier, aeroge composite heat-insulated material, gas filtering material.