Titanium dioxide (TiO2), an important inorganic chemical pigment, is mainly composed of titanium dioxide. The production process of titanium dioxide includes sulfuric acid process and chlorination process. It is widely used in coating, ink, paper making, plastic rubber, chemical fiber, ceramics and other industries.
TiO2 physical characteristics:
1) Titanium dioxide relative density
Among commonly used white pigments, titanium dioxide has the lowest relative density. Among the white pigments of the same quality, titanium dioxide has the largest surface area and the highest pigment volume.
2) Titanium dioxide melting point and boiling point:
Because anatase can change into rutile at high temperature, the melting point and boiling point of anatase titanium dioxide do not actually exist. Only rutile titanium dioxide has melting point and boiling point. The melting point of rutile titanium dioxide is 1850 ℃, the melting point in air is (1830 ± 15) ℃, and the melting point in oxygen enrichment is 1879 ℃. Melting point is related to the purity of titanium dioxide. The boiling point of rutile titanium dioxide is (3200 ± 300) ℃, and titanium dioxide is slightly volatile at this high temperature.
3) Dielectric constant:
Titanium dioxide has excellent electrical properties because of its high dielectric constant. When determining some physical properties of titanium dioxide, the crystallization direction of titanium dioxide crystal should be considered. The dielectric constant of anatase titanium dioxide is relatively low, only 48.
4) Conductivity:
Titanium dioxide has semiconductor properties. Its conductivity increases rapidly with the increase of temperature, and it is also very sensitive to hypoxia. The dielectric constant and semiconductor properties of rutile titanium dioxide are very important to the electronic industry, which can be used to produce electronic components such as ceramic capacitors.
5) Hardness:
According to Mohs hardness scale, rutile titanium dioxide is 6 ~ 6.5 and anatase titanium dioxide is 5.5 ~ 6.0. Therefore, anatase titanium is used in chemical fiber matting to avoid wear of spinneret holes.
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