Tungsten Military Parts Price

Tungsten Darts Billet and Chrome Dart Billet

Details: Category: Tungsten Information; Published on Tuesday, 03 February 2015 19:42; Written by xsh; Hits: 478

Tungsten – Dart Billet

Nowadays, tungsten-based billet is widely used as the standard barrel material, for it has a specific gravity of 19.3(20℃), making it a very dense material with small volume. Besides, it has superior wearing resistance. The dart billet made by tungsten, today tungsten darts is used by most professionals; the barrels have a slim design and are made for great grouping in the dartboard. When you buy a set of tungsten darts billet ,it's often 80% tungsten and up to 97% tungsten the higher the percent is the thinner the barrels are, and of course higher price.

Chrome Dart Billet
The dart billet made by messing-chrome, this is messing darts with chrome alloy and the darts have some better grip. This type of darts is often used by advanced players. The barrels are a little bit smaller than regular brass darts.

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Tungsten Oxides Colours (IV)

Details: Category: Tungsten Information; Published on Tuesday, 03 February 2015 19:38; Written by cq; Hits: 1791

Colours can also change with the temperature of the material due to alterations in the reflectivity of the oxides. Thermochromism is the property of substances to change colour due to a change in temperature and WO3 is an attractive example for this property. On cooling the oxide by liquid nitrogen down to -196°C, a sudden change occurs from yellow to white, which then alters to a bluishwhite colour between -50 and -27°C. At room temperature it becomes pale lemon-yellow again. On further heating to 200-300°C, WO3 becomes dark yellow, changing to a deep orange colour at 400 to 500°C. These reversible colour changes are linked to changes in the electronic properties of WO3 which alter due to changes of the internal symmetry of the WO3 crystals (through alterations of the lattice arrangements).

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Tungsten Oxides Colours (III)

Details: Category: Tungsten Information; Published on Tuesday, 03 February 2015 19:32; Written by cq; Hits: 1948

The colours of the tungsten oxides are a result of the fact that the absorption and emission of photons (light) are dependent on wavelength. If the material has a low reflectivity at the short wavelength end of the spectrum (460-480 nm) it appears yellow to orange, because only the green and yellow part of the light is reflected. If it has a low reflectivity at the long wavelength end of the spectrum (550-700 nm), it appears blue or violet. If all components of the white light are absorbed and not re-emitted, the material appears black.

Colours can significantly change with different valence states within an oxide structure, although the parent structure of differently coloured oxides basically appears the same (due to changes in absorption and reflection and/or transmission). Inherent colours also change with the size of the particles, and the colours of powders therefore can significantly differ from those of single crystals. Thin films of tungsten trioxide are even transparent, but can be readily coloured by impurities which are used today for electronic devices.

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Tungsten Dart Billet

Details: Category: Tungsten Information; Published on Tuesday, 03 February 2015 19:35; Written by xsh; Hits: 561

Tungsten is a very dense material, so darts with a considerable weight can be made slim.Billets are actually tungsten cylinder rods after surface grinding by center-less processing, and their weights are varied from different tungsten contents and rod sizes. Tungsten is used in dart production because of its high weight to volume ratio. The higher percentage of tungsten used to make a dart which is the slimmer and sleeker. Tungsten billet is the raw material of barrel which forms the main part of tungsten dart.

Nowadays, lots of people are like to buy the tungsten dart billet very much, because of there are advantage for using.

The higher the percentage, the slimmer the dart will be, resulting in increased higher scoring chances. A 90 % tungsten darts will be slimmer than an 80 % with the same weight and length.

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Tungsten Oxides Colours (II)

Details: Category: Tungsten Information; Published on Tuesday, 03 February 2015 19:28; Written by cq; Hits: 1902

Stoichiometric compounds such as W20O58, W18O49 or WO2 are formed intermediately during the reduction process and can be isolated by interrupting the reduction process at the selected reduction state.

All , characteristic crystal symmetries, and also peculiar crystal forms. They are commonly not visible to the naked eye, as the powder particles are too small for a simple visual detection.

However, they can be made visible by looking at the powders with the help of an electron microscope where distinct differences of the crystal forms can be clearly recognised.

Colours of the tungsten oxides, prepared by interrupting the reduction process at selected reduction stages: yellow WO3, blue W20O58, violet W18O49, chocolate-brown WO2, and grey W metal.

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