Composite tin antimony oxide thermal insulation material and preparation method thereof

The invention discloses a composite tin antimony oxide thermal insulation material, which relates to the technical field of thermal insulation materials. The composite tin antimony oxide thermal insulation material is prepared from cenosphere, stannic chloride and antimony trichloride in a proportion of 0.5-5 g: 0.015-0.06 mol: 0.00125-0.00378 mol, and the grain size of the used cenosphere is 200-1800 meshes. A preparation method of the composite tin antimony oxide thermal insulation material comprises the following steps: preparing a seed crystal; and preparing a composite tin antimony oxide precursor; and filtering, washing and drying the composite tin antimony oxide precursor, and then calcinating the composite tin antimony oxide precursor to obtain the composite tin antimony oxide thermal insulation material. The prepared composite tin antimony oxide thermal insulation material has a favorable thermal insulation effect; used raw materials are simple, are easily obtained and have low cost; the composite tin antimony oxide thermal insulation material is used for preparing a thermal insulation coating layer; the heat transfer is reduced; the temperature is decreased; the cooling expense is saved; through adding ammonia water as a precipitant, a tin antimony oxide is firmly attached on the surface of the cenosphere; the service life is long; and the heat insulation effect is good.