What is zinc selenide?

Zinc selenide is an inorganic compound with the chemical formula ZnSe. It is a yellow crystalline powder, insoluble in water, and is mainly used in the manufacture of infrared-transmitting materials and infrared optical instruments.

Physicochemical properties of zinc selenide

Zinc selenide material is a yellow transparent polycrystalline material with a crystal particle size of about 70 μm and a light transmission range of 0.5-15 μm. Synthesized by the chemical vapor deposition (CVD) method, there is basically no impurity absorption, and the scattering loss is extremely low. Due to its small absorption of light with a wavelength of 10.6 μm, it has become the material of choice for optical devices in high-power CO2 laser systems. In addition, it is also a commonly used material in different optical systems in its entire light transmission band.

Zinc selenide material has a high resistance to thermal shock, making it the best optical material in high power CO2 laser systems. The hardness is only 2/3 of that of multispectral ZnS. The material is soft and prone to scratches, and the material has a large refractive index. Therefore, it is necessary to coat the surface with a high-hardness anti-reflection film to protect it and obtain higher transmittance. In its usual spectral range, scattering is very low. When used as a high-power laser device, it is necessary to strictly control the bulk absorption and internal structural defects of the material, and to use the least destructive polishing technology and the highest optical quality coating process.

Optical properties of zinc selenide powder

Body absorption coefficient: 0.0005/cm

Refractive index temperature change rate: 61x10-6/℃

Refractive index non-uniformity: < 6X10-6

Thermodynamic properties of zinc selenide sputtering target

Thermal conductivity: 0.18W/cm/℃

Specific heat: 0.356J/g/℃

Linear expansion coefficient (20℃): 7.57x10-6/℃

Zinc selenide lump mechanical behavior

Young's Modulus: 6.85X1011 dyne/cm2

Rupture Modulus: 5.7X108 dyne/cm2

Knoop Hardness: 110-130Kg/mm2

Poisson's Ratio: 0.28

Transmission range: 0.5-22μm

Rupture modulus: 55.2 MPa

Young's modulus of elasticity: 67.2 kMPa

Fracture toughness: 0.5 MPa/m1/2

Applications of zinc selenide

Mainly used in the manufacture of infrared transparent materials and infrared optical instruments.