Aluminum precursor coated titanium dioxide, preparation method thereof and method for preparing aluminum coated titanium dioxide
A technology of precursors and titanium dioxide, which is applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems of limiting the application of titanium dioxide, difficulty in controlling self-phase nucleation and heterogeneous nucleation, and the thickness of the coating layer unequal problem
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Embodiment 1
[0032] An aluminum precursor is coated with titanium dioxide, and the surface of the titanium dioxide is coated with an aluminum oxide precursor.
[0033] In this embodiment, the alumina precursor is basic ammonium aluminum carbonate.
Embodiment 2
[0035] The invention relates to an aluminum-coated titanium dioxide. The aluminum precursor coated with the titanium dioxide is dried and converted into a hydrated aluminum oxide film, and the hydrated aluminum oxide film is coated on the surface of the titanium dioxide.
Embodiment 3
[0037] A kind of preparation method of aluminum precursor coating titanium dioxide, its step comprises,
[0038] (1) Take titanium dioxide or titanium dioxide slurry prepared in the laboratory, or commercially available titanium dioxide or titanium dioxide slurry and mix it with water to prepare a titanium dioxide slurry with a concentration of 40-200g / L, and add titanium dioxide to the titanium dioxide slurry Sodium hexametaphosphate with a mass fraction of white powder of 1-5% is used as a dispersant and ultrasonically dispersed;
[0039] (2) Add 0.5-10% soluble aluminum salt accounting for titanium dioxide mass fraction, the concentration of soluble aluminum salt solution is 0.1-3mol / L, stir for 0.5h-3h; soluble aluminum salt includes but not limited to aluminum sulfate, aluminum nitrate, aluminum chloride;
[0040] (3) Add 50-200% of the soluble ammonium salt that accounts for 50-200% of the mass fraction of the soluble aluminum salt used in step (2), the concentration of...
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