June 21, 2021

These Are Tungsten’s Characteristics And Usage

In 1779 Irish chemist Peter Woulfe concluded the existence of a new element – tungsten from his analysis of the mineral wolframite (mineral manganese tungstate iron). Tungsten was isolated as a tungstic oxide in 1781, in Sweden, by Carl W. Scheele from the mineral scheelite (calcium tungstate). But he did not have a suitable furnace for reducing oxides to metals. Tungsten was finally isolated by brothers Fausto and Juan Jose de Elhuyar in 1783, in Spain, by reducing tungstenite acidified with charcoal. Nowadays, this metal is also used for making accessories, so perhaps you want to see some tungsten wedding bands.

The name of the element comes from the Swedish word ‘tungsten’ which means heavy stone. The chemical symbol, W, is derived from the element’s original name, Wolfram. Tungsten is one of the five main refractory metals (metals with very high resistance to heat and wear). Other refractory metals are niobium, molybdenum, tantalum, and rhenium. Tungsten is considered to have low toxicity.

Tungsten is a very hard, dense, silvery-white, sparkling metal that stains air, forming a protective oxide layer. In the form of gray tungsten powder.

This metal has the highest melting point of all metals, and at temperatures over 1650 oC also has the highest tensile strength. Ductile pure tungsten, and tungsten wire, even with very small diameters, have very high tensile strength.

Tungsten is very resistant to corrosion. This metal forms tungstic acid or wolframic acid from hydrated oxides and the salt is called tungstate, or wolframate.

When in compounds, tungsten is largely in the oxidation state VI.

Tungsten and its alloys are widely used for old-style (not energy-efficient) electric lamp filaments and electronic tubes.

Tungsten is also used as a filament in halogen tungsten lamps. These lamps use halogens such as bromine and iodine to prevent tungsten filaments from falling and are therefore more energy-efficient than standard incandescent light bulbs.

High-speed steel (which can cut material at a higher speed than carbon steel), containing up to 18% tungsten.

Tungsten is used in heavy metal alloys because of its hardness and in high-temperature applications such as welding.