ZnSe material is a chemically inert, non-hygroscopic and highly pure product that is very effective in many optical applications due to its extremely low bulk losses, high resistance to thermal shock and stability in virtually all environments, easily machined.
Is ZnSe a semiconductor?
ZnSe is a light yellow solid (Figure 12). It is an intrinsic semiconductor with a bandgap of about 2.70 eV at RT. ZnSe rarely occurs in nature. It is found in the mineral stilleite named after Hans Stille.
What are the properties of zinc?
Physical properties of zinc
- density – 7.13 g/cm³;
- color – bluish-white;
- melting point – 420 °C;
- elasticity and malleability increase when heated to approximately 100 °C;
- boiling point of 906 °C;
- at temperatures above 200 °C, loses its elasticity and becomes a grey powder;
- high heat capacity and heat conductivity;
What is the formula for zinc selenide?
ZnSe
Zinc selenide/Formula
Is ZnSe covalent or ionic?
The zinc vacancy centre in ZnSe One is as a purely ionic system, with Zn2+ and Se2- ions. The other is as a covalent system in which covalent bonds between sp3 hybrids are formed; here one has Zn2- and Sez+.
What is the name for ZnSe?
Zinc Selenide (ZnSe)
What is the property of zinc metal?
Zinc is a lustrous bluish-white metal. It is found in group IIb of the periodic table. It is brittle and crystalline at ordinary temperatures, but it becomes ductile and malleable when heated between 110°C and 150°C.
How do you make ZnSe?
The ZnSe product was prepared by first dissolving 2 g of PVP in 70 mL of deionized water, followed by vigorous stirring for 2 h at 70 °C. Next, 0.4 mmol of selenium powder was dissolved in 80 mL of ethylenediamine.
What are the properties and uses of zinc?
Uses and properties A silvery-white metal with a blue tinge. It tarnishes in air. Most zinc is used to galvanise other metals, such as iron, to prevent rusting. Galvanised steel is used for car bodies, street lamp posts, safety barriers and suspension bridges.
Is zinc selenide shiny or dull?
It has a standard enthalpy of formation of 177.6 kJ/mol at 25 °C. It adopts a Zincblende lattice structure with lattice constant a=566.8 picometers. ZnSe rarely occurs in nature….
| Zinc selenide | |
|---|---|
| Appearance | light yellow solid |
| Density | 5.27 g/cm3, solid |
| Melting point | 1525 °C |
| Boiling point | °C |
What is ZnSe used for in optical materials?
ZnSe is used widely for IR components, windows and lenses, and for spectroscopic ATR prisms. Zinc Selenide is one of the materials of choice for CO 2 laser optics operating at 10.6 microns. ♦ Zinc Selenide IR Transmission data table ©2019.
What is the difference between zinc selenide and ZnSe?
Zinc Selenide is microcrystalline in structure, the grain size being controlled to produce maximum strength. Single crystal ZnSe is available, but is not common but has been reported as having lower absorption and thus more effective for CO 2 optics.
What does ZnSe stand for?
Zinc Selenide (ZnSe) Prism Grade II-VI has the capability to grow prism grade ZnSe up to 2.50” thick. Prism grade ZnSe exhibits minimal refractive index variations within the material on planes perpendicular to the growth direction as well as in other directions.
What is the temperature of zinc selenide?
Zinc Selenide oxidizes significantly at 300°C, exhibits plastic deformation at about 500°C and dissociates about 700°C. For safety, Zinc Selenide windows should not be used above 250°C in normal atmosphere.
