SnO2, same as the Stannic oxide, chemical formula is SnO2. It is a white or light gray square, hexagonal or orthorhombic powder. The temperature of 1630 ° C, the boiling point is 1800 ° C. Density is 6.95 g / mL at 25 ° C, it is also an excellent transparent conductive material. It is the first transparent conductive material to be put into commercial use. In order to improve its conductivity and stability, it is often used for doping, such as SnO2:Sb, SnO2:F, etc.
1. Bulk density
2. bending strength
Room temperature 1155kg/cm2
3. Resistivity (Ω·cm)
Room temperature 93
400 ° C 6.1000
600 ° C 1.4000
4, anti-soda calcium glass erosion rate (mm / h)
1000°C 0.53 x 10-3
1100°C 0.63 x 10-3
5, thermal expansion rate (1200 ° C)
SnO2 is an important semiconductor sensor material. The gas sensor prepared by it has high sensitivity and is widely used in the detection and prediction of various combustible gases, environmental pollution gases, industrial exhaust gases and harmful gases. The humidity sensor prepared by using SnO2 as a base material has applications in improving indoor environment, precision instrument equipment room, library, art museum, museum, etc. By doping a certain amount of COO in the SnO 2, Co 2 O 3 , Cr 2 O 3 , Nb 2 O 5 , Ta 2 O 5 , etc., varistors with different resistance values can be fabricated in power systems, electronic circuits, household appliances, etc. There are a wide range of uses.
SnO2 has excellent permeability to visible light, excellent chemical stability in aqueous solution, and specific conductivity and infrared radiation reflection characteristics. Therefore, it is transparent in lithium batteries, solar cells, liquid crystal displays, optoelectronic devices, and transparent devices. Conductive electrodes, anti-infrared detection and protection and other fields are also widely used. SnO 2 nanomaterials have smaller size effects, quantum size effects, surface effects and macroscopic quantum tunneling effects, which are more common in traditional optical properties such as light, heat, electricity, sound, magnetic and other macroscopic properties. Significant changes, so nanomaterials can be used to improve the performance of sensor materials.