The physical properties of titanium dioxide

Titanium dioxide, chemical formula TiO2, commonly known as titanium dioxide, used photocatalyst, cosmetics, can rely on UV disinfection and sterilization, are now being extensively developed, will have the opportunity to become the new industry. Titanium dioxide rutile  can be extracted with an acid decomposition, or by the decomposition of titanium tetrachloride.

The physical properties of titanium dioxide as shown below:
Dielectric constant: due to the high dielectric constant titanium dioxide, so it has excellent electrical performance. In some physical properties of titanium dioxide, want to consider the crystallization direction of titanium dioxide crystals. Rutile type, for example, the dielectric constant, varies with the direction of the crystal, when in parallel with C axis, measured dielectric constant is 180, and the axis of 90 when a right Angle, its average powder for 114. Sharp titanium type titanium dioxide only 48 lower dielectric constant.

Conductivity: titanium dioxide with the performance of the semiconductor, its electrical conductivity with temperature rising and increased rapidly, but also very sensitive to hypoxia. For example, rutile type titanium dioxide at 20 ℃ or electrical insulator, but when heated to 420 ℃, its conductivity increased 107 times. Slightly reduce the oxygen content, conductivity of it will have special effects, according to the chemical composition of titanium dioxide (TiO2) conductivity < 10-10 s/cm, and TiO1.9995 the electrical conductivity of only 10 to 1 s/cm. Dielectric constant and the semiconductor properties of rutile type titanium dioxide is very important for the electronics industry, the industry using the above features, production of ceramic capacitors and other electronic components.

Hardness: according to the mohs hardness a 10-point scale scale, rutile type titanium dioxide is 6 ~ 6.5, sharp titanium type titanium dioxide is 5.5 ~ 6.0, therefore in the chemical fiber mat to avoid wear and tear of spinneret hole with sharp titanium type.

Melting point and boiling point: as the sharp titanium and titanium plate can turn into titanium dioxide rutile under the high temperature model, so the melting point of titanium plate and sharp titanium titanium dioxide and the boiling point is actually not exist. Only rutile type titanium dioxide has a melting point and boiling point, rutile type titanium dioxide melting point is 1850 ℃, melting point (1830 soil 15 ℃ in the air and oxygen enrichment of melting point 1879 ℃, melting point is associated with the purity of titanium dioxide. The boiling point of rutile type titanium dioxide for K (3200 + 300), titanium dioxide under the high temperature slightly volatile.

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