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Tin oxide (SnO2)
Tin oxide (SnO2)

Detailed

Tin oxide (SnO2)

Formula (Formula): SnO2
Molecular Weight (Molecular Weight): 150.69
CAS No.: 18282-10-5
Appearance (Appearance): white, pale yellow or light gray Quartet, hexagonal or orthorhombic system powder
 Physicochemical properties (Physical Properties): density of 7, m.p. 1127C, insoluble in water, dilute acid and lye, was dissolved in concentrated sulfuric acid, with a base eutectic formed stannate.
The SnO2 electrode Performance technical indicators
 

1, the volume density 6.38-6.58g/cm3
 

2, the bending strength
 

Room temperature 1155kg/cm2 for
 

1000 ℃ 641kg/cm2
 

1200 ℃ 166kg/cm2
 

1400 ℃ 95kg/cm2
 

3, the resistivity (Ω · cm)
 

At room temperature for 93
 

400 ℃ 6.1000
 

600 ℃ 1.4000
 

800 ℃ 0.0200
 

900 ℃ 0.0150
 

1000 ℃ 0.0098
 

1100 ℃ 0.0084
 

4, anti-soda-lime glass erosion rate (mm / h)
 

1000 ℃ 0.53 x 10-3
 

1100 ℃ 0.63 x 10-3
 

5, the coefficient of thermal expansion (1200 ℃)
 

0.69%
  

Use (Useage)
For enamel and magnetic materials, and for the manufacture of opal glass, tin salts, ceramic colorant, fabric mordant and weighting agents, steel and glass polishing agent
 

Tin dioxide (SnO2) Electrodes widely used in high-grade optical glass melting as well as electrolytic aluminum industry, electrical grade tin dioxide is particularly suitable for flint type glass, barium flint, barium crown, as well as re-crown glass, etc., melting, and the pair of glass does not produce pollution.
    
SnO2 is also an excellent transparent electroconductive material. It is the first put into commercial transparent conductive material, often used to carry out doping in order to increase its conductivity and stability, such as of SnO?: Sb, SnO?: F, etc.. The SnO2 and doping have a tetragonal rutile structure (tetragonal rutile), as shown. Red is O, black is Sn, SnO2 by two Sn and four O atoms, and a lattice constant of a = b = 0.4737nm, c = 0.3186nm, c / a = 0.637. O ^ 2 - = 0.140nm, Sn ^ 4 + = 0.071nm.
 
    
SnO2 is an n-type wide bandgap semiconductor, the forbidden band width of 3.5-4.0 eV, visible and infrared transmittance of 80%, a plasma edge located 3.2μm, the refractive index of> 2, the extinction coefficient tends 0.SnO2 strong adhesion, with a combination of glass and ceramics force of up to 20MPa, Mohs hardness of 7-8, good chemical stability, can withstand chemical etching. SnO2 as the electrically conductive film, the carrier from the crystal defects, i.e. electronic O vacancies and impurities are doped.
      
SnO2 is an important semiconductor sensor materials, high sensitivity gas sensors prepared with it, are widely used in a variety of combustible gases, environmental pollution gas, industrial waste gas, as well as the harmful gas detection and forecasting. SnO2 as the matrix material prepared humidity sensors, have applications in improving the indoor environment, precision instruments, equipment rooms, and libraries, art galleries, museums. On SnO2 doped with a certain amount of CoO, Co2O3, Cr2O3, Nb2O5, Ta2O5, etc., can be made of different resistance varistors have a wide range in terms of power systems, electronic circuits, household appliances and other uses.
 

SnO2 having a good permeability to visible light, has excellent chemical stability in aqueous solution, and having the characteristics of the specific conductivity and reflectance of the infrared radiation, so in the lithium batteries, solar cells, liquid crystal display, the optoelectronic device, a transparent conductive electrode, anti-infrared detection protection and other fields are also widely used. SnO2 nano-materials due to its small size effect, quantum size effect, surface effect and macroscopic quantum tunnel effect in physical characteristics such as light, heat, electricity, sound, magnetic, and other macroscopic properties compared with traditional SnO2 significant changes occurred , so the sensor can be improved through the use of nanomaterials
 

Packaging: plastic bucket, 25 kg, or packaging according to customer requirements
The chemical composition: of SnO2> 99%, acid-melt debris 《0.1% ,Loss on ignition 《0.3%, iron《0.003%, Pb 《0.003%, copper《%, SO4 <0.005%
 

Ms. Chen,                           Ganzhou tin Chemical Co., Ltd. 

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