JiYuan Ruiyang Industrial Co., Ltd

　　1. Relative density

　　Among commonly used white pigments, titanium dioxide has a relatively low density, while among white pigments of the same quality, titanium dioxide has a large surface area and a high pigment volume.

　　2. Melting and boiling points

　　Due to the transformation of rutile type titanium dioxide into rutile type at high temperatures, the melting and boiling points of rutile type titanium dioxide actually do not exist. Only rutile type titanium dioxide has a melting point and boiling point. The melting point of rutile type titanium dioxide is 1850 ℃, the melting point in air is (1830 ± 15) ℃, and the melting point in oxygen rich is 1879 ℃. The melting point is related to the purity of titanium dioxide. The boiling point of rutile type titanium dioxide is (3200 ± 300) ℃, and at this high temperature, titanium dioxide is slightly volatile.

　　3. Dielectric constant

　　Due to its high dielectric constant, titanium dioxide has excellent electrical properties. When determining certain physical properties of titanium dioxide, the crystallization direction of titanium dioxide crystals should be considered. The dielectric constant of rutile titanium dioxide is relatively low, only 48.

　　4. Conductivity

　　Titanium dioxide has semiconductor properties, and its conductivity rapidly increases with temperature, and it is also very sensitive to hypoxia. The dielectric constant and semiconductor properties of rutile type titanium dioxide are very important for the electronic industry, and can be used to produce electronic components such as ceramic capacitors.

　　5. Hardness

　　According to the Mohs hardness scale, the rutile type titanium dioxide is 6-6.5 and the anatase type titanium dioxide is 5.5-6.0. Therefore, in chemical fiber extinction, the anatase type is used to avoid wear on the spray hole.

　　6. Hygroscopicity

　　Although titanium dioxide has hydrophilicity, its hygroscopicity is not very strong, and the rutile type is smaller than the rutile type. The hygroscopicity of titanium dioxide is related to its surface area, which is large and has high hygroscopicity. It is also related to surface treatment and properties.

　　7. Thermal stability

　　Titanium dioxide is a substance with good thermal stability.

　　8. Particle size

　　The particle size distribution of titanium dioxide is a comprehensive indicator that seriously affects the performance of titanium dioxide pigments and product applications. Therefore, discussions on covering power and dispersibility can be directly analyzed from the perspective of particle size distribution.

　　The factors that affect the particle size distribution of titanium dioxide powder are relatively complex. Firstly, the size of the hydrolysis original particle size is controlled and adjusted by the hydrolysis process conditions to keep the original particle size within a certain range. Next is the calcination temperature. During the calcination process of metatitanic acid, particles undergo a phase transition and growth period. Control the appropriate temperature to keep the growing particles within a certain range. It is the crushing of products, which usually involves the modification of Raymond mill and the adjustment of analyzer speed to control the crushing quality. At the same time, other crushing equipment can be used, such as universal mill, airflow crusher, and hammer grinding device.