Applications of selenium and tellurium
The global production of selenium and tellurium is about 500-600 tons,
and the Terulla is about 100 grams per year.
Selenium and tellurium have very stable and important areas of use.
The main USES of selenium and its compounds are in the electrical, glass
and rubber industries.
The properties of selenium and tellurium are to change its electrical
conductivity in the presence of light. It is used to make photocells,
photometers and various signalling devices. Selenium is widely used in
the manufacture of rectifiers, and its role is based on the fact that
selenium is a semiconductor. Selenium rectifier has advantages over
Cuproxis. They have greater electrical stability and allow for higher
operating temperatures.
During the production of selenium and tellurium, sodium selenide is
added to the glass to make it orange or red (depending on the
concentration of selenium). Adding selenium to glass coated with iron
will discolor the glass because orange is the extra color of green.
In the se-rubber industry (a mixture of sulfur or sulfur), rubber is
used in the vulcanization process for tires and insulation materials.
Selenium-rubber is used to cover alpine cars, excavators, transformers
and portable cables.
Other applications mentioned include the use of selenium compounds in
coal, petroleum and lower hydrocracking as catalysts in the production
of toxic colors as well as agricultural pest control.
It is mainly used as an alloy additive to lead to improve its mechanical
strength and corrosiveness. Therefore, adding 0.05 percent lead can
reduce lead consumption by 20 percent, which is important for making
cables. Recommend introducing tellurium to fly to 0.45% copper (Te) to
improve heat resistant copper and introduce his adventures.
In electrical engineering, selenium and tellurium are used as detector
metals and high-resistance alloys in radio instruments. The applications
of tru-platinum thermocouple and Tru-Wismut thermocouple were found.
Tellurium compounds are used in the glass and ceramic industries to dye
glass glaze enamel blue flowers. Together with Serin, they used Tellur
extensively in the rubber industry. Mention should be made of the use of
diethyl formaldehyde as an explosion-proof agent for catalysts.
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Selenides and tellurides