Chemical properties of titanium, physical properties of titanium

Food grade white pigment (titanium dioxide): It is a non-toxic, tasteless, white powder, slurry type. Features:

It is high whiteness, good diffusion, high purity, less impurities, fine particle size, strong dispersion, small addition ratio, shielding effect on ultraviolet rays, insoluble in water, insoluble in solvents, insoluble in acid and alkali, stable performance. It is widely used in the food and pharmaceutical industries.

It is used in the food and pharmaceutical industries to whiten and color, so that the product has a strong brightness in appearance and color, and will not affect the quality of the product. Food additive white pigment (titanium dioxide) is currently the world's best food and pharmaceutical brightener, this product is physical whitening in food and medicine, no chemical reaction, can be directly added to food and medicine.

Name: Food grade titanium dioxide (common name white pigment).

Molecular formula: TiO2

Specification: powdered liquid form.

Executive standard: Q ibey4-2006

Properties: [Physical] Non-toxic, odorless white powder [Chemical].

TiO2 Content: Heavy Metal Content: 20ug g

AS: 8ug g, loss on drying: loss on burning:

Water solubles: Acid solubles: ;

Packing: 25kg drum (bag kg drum (bag);

Shelf life: 12 months;

Scope of use: candy coating, jelly, preserved fruit, flour, beverages, dairy products, solid beverages, aquatic products, mushrooms; medicinal capsules; cosmetics, toothpaste, chewing gum, children's toys; Pet food.

Storage method: place in a dry, cool, ventilated, and dark place to properly store the use effect: uniform particle size, good dispersion, no flocculation and precipitation; It has low heavy metal content and is an edible brightener with good coloring effect.

Addition ratio: according to GB2760-1996 food additives colorant use standards.

Our company's food-grade titanium dioxide has three complete certificates.

Dried fruit, jelly--[flour--[.]

Vermicelli --[Milk--[.]

Dairy --[Tofu--[

Soy milk - [aquatic products (fish balls);

Soup--[chewing gum--[.]

medicinal capsules;

Titanium is an important alloying element in steel and alloys, and the density of titanium is gram cubic centimeters (20), which is higher than aluminum and lower than iron, copper and nickel. But the specific strength is at the top of the metal. Melting point 1668 4, latent heat of melting kilocalorie atoms, boiling point 3260 20, latent heat of vaporization kilocalorie atoms, critical temperature 4350, critical pressure 1130 atmospheres.

The thermal and electrical conductivity of titanium is poor, similar to or slightly lower than that of stainless steel, titanium has superconductivity, and the superconducting critical temperature of pure titanium is . At 25, the heat capacity of titanium is 1149 kg, the entropy is the Kark atom, and the metal titanium is a paramagnetic substance with a permeability.

Titanium is plastic, and the elongation of high-purity titanium can reach 50-60%, and the section shrinkage can reach 70-80%, but the shrinkage strength is low (that is, the force generated during shrinkage). The presence of impurities in titanium has a great impact on its mechanical properties, especially interstitial impurities (oxygen, nitrogen, carbon) can greatly improve the strength of titanium and significantly reduce its plasticity. The good mechanical properties of titanium as a structural material are achieved by strictly controlling the appropriate impurity content and adding alloying elements.

Relative density: Among the commonly used white pigments, titanium dioxide has the smallest relative density, and among white pigments of the same quality, titanium dioxide has the largest surface area and the highest pigment volume. Pigment name Density (g cm) Pigment name Anatase titanium dioxide Lead sulphate Rutile titanium dioxide Zinc oxide Plate titanium titanium titanium dioxide Zinc barium white Basic lead carbonate Zinc sulfide 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 is taken into account. For example, the dielectric constant of the rutile type, which varies with the orientation of the crystal, is measured at 180 when parallel to the c-axis and 90 at right angles to this axis, with a powder average of 114.

The dielectric constant of anatase titanium dioxide is relatively low at 48.

Electrical conductivity: Titanium dioxide has the properties of a semiconductor, its conductivity increases rapidly with rising temperature, and it is also very sensitive to hypoxia. For example, rutile titanium dioxide is still an electrical insulator at 20, but when heated to 420, its conductivity increases by a factor of 107.

A slight reduction in the oxygen content has a special effect on its conductivity, which is < 10-10s cm by chemical composition of titanium dioxide (TiO) and up to 10-1s cm. The dielectric constant and semiconductor properties of rutile titanium dioxide are important for the electronics industry, which uses these properties to produce electronic components such as ceramic capacitors.

Hardness: According to the Mohs scale of 10 points, rutile titanium dioxide is 6, and anatase titanium dioxide is, so in the chemical fiber matting to avoid wearing the spinneret and use the anatase type.

Melting and boiling points: Since both anatase and tanatase titanium dioxide are transformed into rutile at high temperatures, the melting and boiling points of both tabular and anatase titanium dioxide are virtually non-existent. Only rutile titanium dioxide has a melting point and a boiling point, the melting point of rutile titanium dioxide is 1850, the melting point in air (1830 15), and the melting point in oxygen enrichment is 1879, and the melting point is related to the purity of titanium dioxide.

Rutile titanium dioxide has a boiling point of (3200 300)K, and titanium dioxide is slightly volatile at this high temperature.

Hygroscopicity: Although titanium dioxide is hydrophilic, it is not very hygroscopic, and the rutile type is smaller than that of anatase type.

The hygroscopicity of titanium dioxide has a certain relationship with the size of its surface area, which has a large surface area and high hygroscopicity.

The hygroscopicity of titanium dioxide is also related to the surface treatment and properties.

Thermal stability: Titanium dioxide is a substance with good thermal stability, and the general dosage is.

Physical structure: rutile type, anatase type; Crystalline system, tetragonal system.

Lattice constants: A-axis, C-axis, A-axis, C-axis.

A-axis: C-axis: