Difference of Rutile titanium dioxide and anatase titanium dioxide

Titanium dioxide is mainly divided into three types: plate titanium dioxide, anatase titanium dioxide and rutile titanium dioxide. Among them, rutile titanium dioxide and anatase titanium dioxide are two important types of titanium dioxide, which are currently the most widely used in the market, but the properties of the two are very different.

1. Differences in application fields

Plate titanium type is unstable crystal type, no industrial use value, Anatase type titanium dioxide (Anatase) referred to as type A, and Rutile type titanium dioxide (Rutile) referred to as type R, all have a stable lattice, is an important white pigment and porcelain glaze, Compared with other white pigments, it has superior whiteness, coloring power, hiding power, weather resistance, heat resistance, and chemical stability, especially no toxicity.

Anatase titanium dioxide, that is, type A titanium dioxide. It is an excellent white powder pigment, with good light scattering ability, so the whiteness is good, hiding power is strong, and has a high chemical stability, non-toxic and tasteless, no stimulating effect on the human body, widely used in many industrial fields, such as coatings, plastics, paper making and ink.

Rutile type titanium dioxide, that is, R-type titanium dioxide. Combined with the sulfuric acid process rutile titanium dioxide production quality control experience, set inorganic coating, organic treatment, salt treatment, calcination control, hydrolysis and product application of innovative research, the use of advanced hue and particle size control, zirconium silicon aluminum phosphorus multi-component inorganic coating and new organic treatment technology, the development of a new generation of high-grade universal (partial water) rutile titanium dioxide. Suitable for all kinds of building paint, industrial paint, anti-corrosion paint, ink, powder coating and other industries.

2. Differences in chemical properties

The difference between the two is mainly the degree of distortion of the octahedron and the way of connecting each other.

The difference of crystal cell structure between rutile and anatase also leads to the difference of physical and chemical properties of the two crystal types.

From a thermodynamic point of view, rutile is the most stable crystal form, with a melting point of 1870℃. Anatase is a low-temperature phase of titanium dioxide, which is generally transformed into rutile at 500 ° C ~600 ° C. The essence of the crystal transformation of titanium dioxide is the rearrangement of the octahedral unit of the cell structure. Rutile crystal structure has more dense atomic arrangement, higher density, hardness, dielectric constant, and greater light scattering.

Therefore, rutile is a commonly used white coating and anti-ultraviolet material, which has a very strong shielding effect on ultraviolet rays, and has a wide range of applications in industrial coatings and cosmetics.

The band gap width of anatase is slightly larger than that of rutile, and photogenerated electrons and holes are not easy to compound on the surface, so it has higher photocatalytic activity and can directly use ultraviolet light in sunlight for photocatalytic degradation, and will not cause secondary pollution.

Therefore, anatase is commonly used as a photocatalytic material to deal with environmental pollution problems.