The difference between rutile titanium dioxide and anatase titanium dioxide

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

Application of anatase titanium dioxide and rutile titanium dioxide  

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

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

Rutile type titanium dioxide, namely R type titanium dioxide.  Combined with sulfuric acid method of rutile type titanium pigment production quality control experience, collection of inorganic membrane, organic processing, salt processing, calcination control, hydrolysis and product application of innovative research, adopting the advanced color and grain size control, zirconium silicon aluminum phosphorus multiple inorganic membrane and new type of organic processing technology, development of a new generation of high-end general-purpose rutile titanium dioxide (partial water).  Suitable for all kinds of building paint, industrial paint, anticorrosive paint, ink, powder paint and other industries.  

Chemical properties of anatase titanium dioxide and rutile titanium dioxide  

The main difference between the two is the degree of distortion and the way of connection of octahedron.  

The difference of cell structure between rutile and anatase also results in the different physical and chemical properties of the two crystals.  From the thermodynamic point of view, rutile is the most stable crystal, melting point of 1870℃;  Anatase is the low temperature phase of titanium dioxide, generally converted into rutile at 500℃~600℃.  The essence of the crystal transformation of titanium dioxide is the rearrangement of octahedron, the constituent unit of crystal cell structure.  The 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, has a very strong shielding effect on ultraviolet light, 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 the photogenerated electrons and holes are not easy to compound on the surface. Therefore, anatase has higher photocatalytic activity and can directly use ultraviolet light in the sunlight to photocatalytic degradation, without causing secondary pollution.  

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