Diffrence of anatase titanium dioxide and rutile titanium dioxide.

[Tiarticle]

At present, the world's consumption of titanium dioxide in the rutile type accounted for 75 to 80%, anatase only 20 to 25%. Since the same belongs to the titanium dioxide series of these two kinds of titanium dioxide What is the difference?
1) Internal structure crystal
Rutile titanium dioxide crystal structure is stabilityer than Antase grade
2) Melting point and boiling point
As the anatase in high temperature will be converted into rutile type, so the anatase titanium dioxide melting point and boiling point is actually not present. Rutile Titanium dioxide has a melting point of 1850 ° C,The boiling point of rutile titanium dioxide is (3200 ± 300) ℃,
3) Dielectric constant
Due to the high dielectric constant of titanium dioxide, it has excellent electrical properties. In determining the physical properties of titanium dioxide, the crystallization direction of titanium dioxide crystals is taken into account. The dielectric constant of anatase titanium dioxide is relatively low, only 48%
4) Conductivity
Titanium dioxide has a semiconductor performance, its conductivity increases with the temperature and rapid increase, but also very sensitive to hypoxia. The dielectric constant and semiconducting properties of rutile titanium dioxide are very important to the electronics industry and can be used to produce electronic components such as ceramic capacitors.
5) Hardness
According to Mohs hardness of the system scale, rutile titanium dioxide for the 6 to 6.5, anatase titanium dioxide 5.5 to 6.0, so in the chemical fiber extinction in order to avoid wear and tear hole and the use of anatase.
6) Production methods
Although rutile and anatase sulfuric acid production process is basically similar, but the specific parameters there is a big difference. Anatase products are mostly produced using sulfuric acid, but rutile products are now sulfuric acid and chlorinated two.
7) Coating
Anatase products in the basic calcined settlement, after Raymond grinding broken packaging sales, and rutile products in order to better improve its dispersion, weather and other characteristics, after calcination using alumina or zirconium for surface treatment, help with the same also There is a part of the organic processing.
8 ) Price
It is not difficult to see through the production method, the cost of rutile titanium dioxide than the anatase high, the price is naturally high, the current situation, rutile titanium dioxide price about anteropium titanium powder higher than the 3000-4000 yuan per ton The
In addition, the antase grade of titanium dioxide is better than the whiteness, but the color strength is only 70% rutile tio2, in the weather resistance to join the anatase grade titanium dioxide test piece only after a year after the start of cracking or debris peeling, and adding rutile grade titanium dioxide After a decade, its appearance is only a small change. As the R-type titanium dioxide coloring and weatherability is better, plastic coloring using R-type titanium dioxide as well.

Writing: David He