The Essence Of Titanium Pigment Need To Pay Attention In Type Selection

1.The relative density

In commonly used white pigment, titanium dioxide minimum relative density, the same quality of white pigment, tio2 surface area, the largest paint The highest volume.

2. The melting point and boiling point

Due to the sharp titanium type under the high temperature will be transformed into rutile type, so sharp titanium type titanium dioxide melting point and boiling point is actually not exist. Only the red Stone type titanium dioxide with melting point and boiling point, rutile type titanium dioxide melting point is 1850 ℃, the melting point of (1830 15 ℃ in air and oxygen enrichment in the melt Point is 1879 ℃, melting point is associated with the purity of titanium dioxide. The boiling point of rutile type titanium dioxide for (3200 300 ℃), under the high temperature oxide Titanium is a little volatile.

3. The dielectric constant

As a result of the titanium dioxide high dielectric constant, so it has excellent electrical performance. In some physical properties of titanium dioxide, want to consider two The crystallization of titanium oxide crystal direction. Sharp titanium type titanium dioxide dielectric constant is low, only 48.

4. Electrical conductivity

Titanium dioxide has the performance of the semiconductor, its conductivity with temperature rise and increased rapidly, but also very sensitive to hypoxia. Rutile type 2 Dielectric constant and the semiconductor properties of titanium oxide is very important for the electronics industry, can make use of the nature of the production of ceramic capacitors and other electronic components.

5. The hardness

According to mohs hardness 10-point scale, rutile type titanium dioxide is 6 ~ 6.5, sharp titanium type titanium dioxide is 5.5 ~ 6.0, therefore in order to avoid in the chemical fiber mat Wear silk spray hole with sharp titanium type.

6. Hygroscopic

Although there are hydrophilic titanium dioxide, but its hygroscopicity is not too strong, rutile type a sharp titanium type for small. The size of the hygroscopicity of titanium dioxide and its surface area Have certain relations, large surface area, high hygroscopicity, also related to the surface treatment and the nature.

7. Thermal stability

Titanium dioxide is thermal stability good material.

8.Dispersibility 

As the package of inventory or titanium dioxide formed by agglomeration (clumps) (accumulation and caking coagulation), formation of titanium pigment and resin after dispersive mixing evenly Mixture. Good dispersion is not only can eliminate the spots of the final product (speaks), and (streaks) phenomenon, and can ensure maximum light scattering effect Rate. When choosing titanium dioxide grade and dispersion process, special attention should be paid to the following three:

Titanium white grade of dispersion are different due to the manufacturing process. Inorganic oxide, for example, the surface treatment of titanium dioxide grade is usually at the end of the processing quality Is easy to be dispersed in the liquid in the system (plasticizer (plasticizers), plastic compound (plasticizedvinyl)). But on the other hand, at the end of the surface Processing grade is usually easy to disperse in the dry mixing grinding (dryblending) such as polyethylene, polystyrene, or other molded with the resin manufacturing process.

Individual titanium dioxide particles can't break. No matter how much they join the energy in the process of agglomeration, the break up of agglomerate, they are particles The separation of here.

Dispersion (dispersion), the use of the word is often vague. For example, some "dispersion" is, in fact, a formula on dilution inadequate asked Problem, but also in the plastic left unsolvable thick spots.

In plastic applications, the titanium white pigment is more popular, because of its under low pigment content, can provide the best scattering effect. In addition to the optical properties of , other important features of the product, also decided to titanium white wait for level, to apply to special purpose. In this chapter, the some important features of the product will be The discussion.

9. Optical performance

Need to consider when choosing application of titanium dioxide resilience, the intensity of color, color and color (color) when the optical properties of the basic. A white pigment Resilience and the intensity of color shows its efficiency of light scattering, resilience shows white opaque pigment use plastic system capacity, and the intensity of the color is Show white pigment on the colored plastic system provided by the whiteness, whiteness and brightness (brightness). The most because it is more easily measure the color intensity Commonly used to represent the light scattering efficiency of white pigment. To measure the relative intensity of the color, in the sample (s) per gram titanium white carbon black mixed with 0.008 g, use Right to use the mixture of black paint group (Masterbatch) scattered plastic, produced by the uniform gray plastic, opaque plastic (sheets) or molded pieces (moldedchips). Have the largest light scattering efficiency of titanium dioxide try mouth can provide the most shallow gray and optimum light reflex.