Tin dioxide is an excellent transparent conductive material

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 crystal powder. The melting point is 1630°C and the boiling point is 1800°C. It has a density of 6.95 g/mL at 25 °C and 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.

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, hardly soluble in acid or alkali solution, but soluble in hot concentrated sulfuric acid, molten caustic alkali and potassium hydroxide, and slightly soluble in alkali metal carbonate solution. 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.

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. Both SnO2 and its dopants have a tetragonal rutile structure, as shown in Figure 1. Red is O, black is Sn, SnO2 is composed of two Sn and four O atoms, with 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 band gap 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.

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.

SnO2 is an important semiconductor sensor material. The gas sensor prepared with it has high sensitivity and is widely used in the detection and prediction of various combustible gases, environmental pollution gases, industrial waste gas and harmful gases. Humidity-sensitive sensors prepared with SnO2 as the matrix material are used in improving indoor environment, precision instrument equipment rooms, libraries, art galleries, museums, etc. By doping SnO2 with a certain amount of CoO, Co2O3, Cr2O3, Nb2O5, Ta2O5, etc., varistors with different resistance values can be made, which are widely used in power systems, electronic circuits, and household appliances.

SnO2 has good permeability to visible light, excellent chemical stability in aqueous solution, and has specific conductivity and reflect infrared radiation characteristics, so it is used in lithium batteries, solar cells, liquid crystal displays, optoelectronic devices, transparent conductive Electrodes, infrared detection protection and other fields are also widely used. Due to the small size effect, quantum size effect, surface effect and macroscopic quantum tunneling effect of SnO2 nanomaterials, physical properties such as light, heat, electricity, sound, and magnetism, as well as other macroscopic properties, will undergo significant changes compared to traditional SnO2. , So the performance of sensor materials can be improved by using nanomaterials.

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. 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.