The properties and preparation method of tin oxide SnO2 powder

Overview of tin oxide SnO2 powder

Tin oxide is an inorganic substance with the chemical formula SnO2. It is a white, light yellow or light gray tetragonal, hexagonal or orthorhombic crystalline powder. The melting point is 1630°C and the boiling point is 1800°C. With a density of 6.95 g/mL at 25 °C, it is also an excellent transparent conductive material. It is the first transparent conductive material put into commercial use. In order to improve its conductivity and stability, it is often doped and used, such as SnO2: Sb, SnO2: F, etc.

Tin dioxide is also an excellent transparent conductive material. It is the first transparent conductive material put into commercial use. In order to improve its conductivity and stability, it is often doped and used, such as SnO2:Sb, SnO2:F and so on. SnO2 and its dopants have a tetragonal rutile structure, red is O, black is Sn, SnO2 is composed of two Sn and four O atoms, lattice constant a=b=0.4737nm, c=0.3186nm, c/a =0.637. O2-=0.140nm, Sn4+=0.071nm. SnO2 is an n-type wide-bandgap semiconductor with a band gap of 3.5-4.0eV, a visible light and infrared transmittance of 80%, a plasma edge of 3.2μm, a refractive index>2, and an extinction coefficient of 0. SnO2 has strong adhesion, and The bonding force of glass and ceramics can reach 20MPa, the Mohs hardness is 7-8, the chemical stability is good, and it can withstand chemical etching. SnO2 acts as a conductive film, and its carriers mainly come from crystal defects, that is, electrons provided by O vacancies and doped impurities.

The properties and preparation method of tin oxide SnO2 powder

Tin dioxideis produced by gasification method and acid method. The appearance of acidic SnO2 is yellow, and the appearance of gaseous SnO2 is white, with a density of 7, and a melting point of 1127 degrees Celsius. Insoluble in water, dilute acid and dilute alkali solution. Dissolved in concentrated sulfuric acid. It dissolves with alkali to form stannate. Used to make opaque glass, ceramic uranium and glass polishing agent. Cassiterite is naturally produced and can be made by burning tin in the air.

Tin oxide exists in the form of cassiterite in nature. Cassiterite is generally reddish brown, granular or massive, and mostly dispersed in granite. It is the main ore for refining tin. Tin oxide is stable to air and heat, insoluble in water, insoluble in acid or alkali solutions, but soluble in hot concentrated sulfuric acid, molten caustic alkali and potassium hydroxide, and slightly soluble in alkali metal carbonate solutions. It does not react with general chemical reagents, nor does it react with nitric acid. When heated with concentrated hydrochloric acid, it will slowly become chloride and dissolve. At high temperatures, it is reduced to metallic tin under the action of hydrogen. React with CO to obtain metallic tin and CO2, the reaction is reversible. Preparation method: tin is burned in the air, or tetravalent soluble tin salt reacts with alkali, or metal tin reacts with concentrated nitric acid to generate β-stannic acid precipitation, and then heats and dehydrates to prepare tin oxide.

Application of tin oxide SnO2 powder

Tin oxide is often used in enamel and electromagnetic materials, and used in the manufacture of opalescent glass, tin salts, porcelain colorants, fabric mordants and weighting agents, steel and glass polishing agents, etc.

Tin oxide electrodes are widely used in the smelting of high-end optical glass and the electrolytic aluminum industry. The tin oxide electrical grade is especially suitable for the smelting of flint glass, barium flint, barium crown, and heavy crown glass, and does not pollute the glass. This achievement has been appraised by experts organized by the Henan Provincial Department of Science and Technology. The overall performance indicators are at the leading level in China, and the main indicators of tin oxide electrical level have reached the international advanced level.

The main use of nano tin oxide

1. Silver tin contact material. Silver tin oxide contact material is a new type of environmentally friendly electrical contact material that has developed rapidly in recent years. It is an ideal material to replace traditional silver cadmium oxide contacts.

2. Antistatic additives in plastics and construction industry

3. Transparent conductive materials for flat panel and CRT (cathode ray tube) displays

4. Electrical and electronic components

5. Tin oxide electrode for special glass melting

6. Used for photocatalytic antibacterial materials

Tin oxide SnO2 powder price

The price of tin oxide SnO2 powder will vary with the production cost, transportation cost, international situation, exchange rate and market supply and demand of tin oxide SnO2 powder randomly. Tanki New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for tin oxide SnO2 powder, please feel free to send the tin oxide SnO2 powder at the latest price.

Tin Oxide SnO2 Powder Supplier

As a global supplier of tin oxide SnO2 powder, Tanki New Materials Co., Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced technology and engineering materials. The company has successfully developed a series of powder materials (including oxides, carbides, nitrides, single metals, etc.), high-purity targets, functional ceramics and structural devices, and provides OEM services.