The physical properties of titanium dioxide

The physical properties of titanium dioxide: the relative density, melting point and boiling point, dielectric constant, conductivity, hardness, moisture absorption,

thermal stability.
Relative Density
The relative density of the titanium dioxide with the crystal morphology, particle size, chemical composition, in particular the amount of the size and surface

treatment, in the manufacturing process, with the calcination temperature and calcination time to improve the growth of the extension.
Melting and boiling points
As tio2 anatase type titanium dioxide and a plate at a high temperature are converted into rutile, their melting point and boiling point does not actually exist.
Permittivity
As a high dielectric constant of titanium dioxide, it has excellent electrical properties. Under the effect of external electric field, the interaction between ions,

forming a very strong electric field locally. In the electric field effect, the ion outer electron orbits strongly deformed, ion itself also will be a great

displacement. Crystalline titania contained trace impurities and so a great influence on the dielectric constant.
Conductivity
Performance of titanium dioxide having a semiconductor, the conductivity increase with temperature increases rapidly, but also very sensitive to hypoxia.
Hardness
Hardness and crystal structure of titanium dioxide on, in the production and product purity and calcination temperature, high temperature sintering is easy, hardness

will increase. Because of the hardness of rutile titanium dioxide, difficult pulverization nozzle orifice and thus the higher the wear, the wear of the rolls is large,

it unsuitable for chemical fiber matting and gravure printing.
Hygroscopic
Although the hydrophilic titanium oxide, but not too strong moisture absorption, moisture absorption of anatase larger than rutile. Hygroscopicity titania surface

treatment with the nature of the treatment agent, but also on the size of its surface area have a certain relationship, large specific surface area is slightly

hygroscopic.
Thermal stability
Titanium dioxide is the thermal stability of compounds of intense heat under vacuum there is a slight loss of oxygen phenomenon, accompanied show dark blue, the

reaction is reversible, the cooling will be restored to the original white.