Inorganic/organic composite high-temperature ablation resistant material and preparation method thereof

The invention discloses an inorganic/organic composite high-temperature ablation resistant material and a preparation method thereof. The material is prepared from the following ingredients in parts by weight: 80 to 98 parts of organic matrixes, 2.5 to 20 parts of inorganic mixtures, 8 to 14.7 parts of curing agents, 0.16 to 5.88 parts of vulcanizing agents and 0.01 to 0.8 part of surfactants. The preparation method of the material comprises the following steps that (1) silicon dioxide powder, zirconium dioxide powder, boracic acid and lanthanum hexaboride powder are mixed at the normal temperature; stirring is performed to prepare an inorganic mixture; (2) according to the formula, the inorganic mixture, the vulcanizing agents and the surfactants are added into the organic matrixes; after the stirring, ultrasonic treatment and uniform mixing are performed; the curing agents are added into an ice water bath; (3) a product obtained in the step (2) is subjected to degassing under the condition of 10 Pa; then, curing is performed to obtain the composite high-temperature ablation resistant material. The prepared composite high-temperature ablation resistant material has the advantages of high high-temperature resistance, low cost and high practicability.