The main characteristics of titanium dioxide

The main characteristics of titanium dioxide
physical
1) relative density
In commonly used white pigments, titanium dioxide has the smallest relative density, the same quality of white pigments, titanium dioxide has the largest surface area and the highest pigment volume.
[2] 。 2) Melting point and boiling point
Because the sharp titanium type will be transformed into a goldstone type at high temperatures, the melting and boiling point of the sharp titanium type titanium dioxide is virtually non-existent. Only the goldstone type of titanium dioxide has melting point and boiling point, the melting point of titanium dioxide type of goldstone type is 1850 degrees C, the melting point in the air is (1830±15 degrees C), the melting point in oxygen-rich is 1879 degrees C, the melting point is related to the purity of titanium dioxide
China
. The boiling point of titanium dioxide of the redstone type is (3200±300) degrees C, and titanium dioxide is slightly volatile at this high temperature.
[2] 。 3) Dielem constant
due to the high dielecyte constant of titanium dioxide, so it has excellent electrical performance. In determining the physical properties of titanium dioxide, the crystallization direction of titanium dioxide crystals should be considered. The dieletric constant of titanium dioxide is relatively low, only 48.
[2] 。 4) Conductivity
Titanium dioxide has semiconductor properties, its conductivity increases rapidly with temperature, and it is also very sensitive to hypoxia. The dielem constant and semiconductor properties of titanium dioxide are very important to the electronics industry and can be used to produce electronic components such as ceramic capacitors.
[2] 。 5) Hardness
According to Mo's hardness is very scale, goldstone type titanium dioxide is 6 to 6.5, titanium dioxide type is 5.5 to 6.0, so in chemical fiber de-lighting in order to avoid wear spray holes and the use of sharp titanium type.
6) moisture-absorbing
although titanium dioxide is hydro-friendly, but its moisture absorption is not too strong, the redstone type is smaller than the sharp titanium type. The moisture absorption of titanium dioxide has a certain relationship with the size of its surface area, the surface area is large, the moisture absorption is high, and it is also related to the surface treatment and properties.
7) Thermal stability
titanium dioxide is a good substance with good thermal stability.
8) Particle size
Titanium white powder particle size distribution is a comprehensive indicator, it seriously affects the performance of titanium dioxide pigments and product application performance, therefore, the discussion of cover force and dispersion can be directly analyzed from the particle size distribution.
factors affecting the particle size distribution of titanium dioxide are more complex, first of all, the size of the original particle size of hydrolysing, through the control and regulation of hydrolysing process conditions, so that the original particle size within a certain range. Secondly, calcination temperature, partial titanium acid in the process of calcination, particles go through a crystal transformation period and growth, control the appropriate temperature, so that the growth of particles in a certain range. Finally, the product is crushed, usually the rammed modification and analyzer speed adjustment, control the crushing quality, at the same time can use other crushing equipment, such as: all-in-one grinding, air flow shredder and hammer grinding device.
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