Selenium
Inroduction of Selenium Material
The chemical symbol of Selenium is Se, in the periodic table of chemical elements in the fourth period VI group A (element 34). Selenium is a metalloid (an element intermediate in properties between the metals and the nonmetals).
Selenium is rare, composing approximately 90 parts per billion of the crust of Earth. Selenium exists in nature in two ways: Inorganic selenium and plant active selenium.
Inorganic selenium generally refers to sodium selenite and sodium selenite, obtained from the by-products of metal minerals; The latter is a combination of selenium and amino acids through biological conversion, generally in the form of selenomethionine.
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Chemical properties of selenium
Selenium burns in the air with a blue flame and produces selenium dioxide (SeO2). It can directly react with hydrogen and halogen, and directly combine with metal to produce selenide.
Cannot interact with non-oxidizing acids, but it is soluble in concentrated sulfuric acid, nitric acid, and strong bases. Selenium dioxide is obtained by the oxidation of selenium. Hydroselenide dissolved in water precipitates many heavy metal ions into particulate selenides.
| Atomic Symbol | Se |
|---|---|
| Atomic Number | 34 |
| Atomic Weight | 78.96 |
| Density | 4.79 g/cm3 |
| Melting Point: | 221.3℃ |
| Boiling Point | 685℃ |
| CAS No. | 7782-49-2 |
| EINECS No. | 231-957-4 |
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Selenium Metal Supplier
AEM Deposition manufacturing Selenium metal with ultra-high purity. Supply Selenium materials in different forms including selenium powders, ingots, granules, sputtering targets, and more.
Advanced Engineering Materials Limited (AEM) is an international company involved in the R & D, manufacturing, and sales of many types of high-tech materials. We provide high-purity non-ferrous materials, customized alloys, compounds, and almost every kind of complicated synthetic materials to research institutes and high-tech enterprises worldwide.
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Applications of selenium
Glass production:
The largest commercial use of Se, accounting for about 50% of consumption, is for the production of glass. When incorporated in small amounts into a glass, selenium serves as a decolorizer.
Pigment:
Selenium is also used to make pigments for ceramics, paint , and plastics for red or orange color.
Electronic/Electrical:
Due to infrared light transparency, Selenium is used in windows for infrared optical devices (lenses for CO2 lasers).
Alloy Metal materials:
Selenium is also used as an additive to make stainless steel.
When selenium is added to iron and copper-based metals it improves their machinability.
Battery materials :
The lithium–selenium (Li–Se) battery is one of the most promising systems for energy storage in the family of lithium batteries. Selenium is used in solar cells and photocells, the first solar cell was made using selenium.
Manganese electrolysis:
During the electrowinning of manganese, the addition of selenium dioxide decreases the power necessary to operate the electrolysis cells. Selenium is added to the production of electrolytic manganese to enhance the current efficiency.
Agriculture:
Since selenium is an essential micronutrient for animals it is used in premix for feed additives. It is also added to some special blends of fertilizers.
Other uses:
Used in anti-dandruff shampoos; Fertilizers for plants;