In-situ authigenic mullite whister reinforced aluminum titanate porous ceramic material and preparation method thereof

The invention discloses an in-situ authigenic mullite whister reinforced aluminum titanate porous ceramic material and a preparation method thereof. The method comprises the following steps of: adding aluminum fluoride and a stabilizing agent for preventing aluminium titanate from being decomposed into alpha-alumina, pseudo boehmite, titanium dioxide and micro powder which serve as main raw materials, directly ball-milling and mixing powder raw materials by using a wet process, drying, granulating, and performing dry pressing for forming. The in-situ authigenic mullite whister reinforced aluminum titanate porous ceramic material is synthesized in situ directly by a one-step method; and according to the synthesized porous ceramic material, an authigenic mullite whister reinforced phase synthesized in situ is inserted into an aluminum titanate substrate material uniformly. Mullite whisters are synthesized in situ and inserted among gaps of the porous ceramic material uniformly, so an effect of reinforcing aluminum titanate porous ceramics is achieved well. The in-situ authigenic mullite whister reinforced aluminum titanate porous ceramic material lays a good foundation for applying the aluminum titanate porous ceramic material to the filtration of industrial high-temperature flue gas and the purification of tail gas of automotive vehicles.