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The α phase has one third of the electrical resistivity [29] and a much lower superconducting transition temperature T C relative to the β phase: ca. 0.015 K vs. 1–4 K; mixing the two phases allows obtaining intermediate T C values. [30] [31] The T C value can also be raised by alloying tungsten with another metal (e.g. 7.9 K for W-Tc). [32]
Tungsten carbide (chemical formula: WC) is a chemical compound (specifically, a carbide) containing equal parts of tungsten and carbon atoms. In its most basic form, tungsten carbide is a fine gray powder, but it can be pressed and formed into shapes through sintering [7] for use in industrial machinery, engineering facilities, [8] molding blocks, [9] cutting tools, chisels, abrasives, armor ...
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A 66 hp suction gas engine and belt-driven air compressor were erected at Leisner's Wolfram Block mine. [1] The advent of the Thermo Electric Ore Reduction Corporation of Britain sustained the Wolfram district through the war years with the government paying fixed prices. Mr F.C. Cann was General Manager and consulting engineer.
Wolframite is an iron, manganese, and tungstate mineral with a chemical formula of (Fe,Mn)WO 4 that is the intermediate mineral between ferberite (Fe 2+ rich) and hübnerite (Mn 2+ rich). [4] Along with scheelite , the wolframite series are the most important tungsten ore minerals.
Palm's Tungsten E was the cheapest of the Tungsten series, and as such, has been one of the most successful. [citation needed] It has 32 megabytes of memory, a Texas Instruments OMAP (ARM) 126 MHz processor, a 2 + 1 ⁄ 8-by-2 + 1 ⁄ 8-inch (54 mm × 54 mm) transreflective TFT screen, and ran Palm OS 5.2.1.
Scheelite is a calcium tungstate mineral with the chemical formula Ca W O 4. It is an important ore of tungsten (wolfram). Scheelite is originally named after Swedish chemist Carl Wilhelm Scheele (1742–1786). Well-formed crystals are sought by collectors and are occasionally fashioned into gemstones when suitably free of flaws.
The SAE designation for all tungsten steels consist of four numbers beginning with the number 7, in the format 7XXX. Tungsten steel also has a greater density than regular stainless steel, tungsten steel, also known as cemented carbide has a density of 14.8 g/cm^3. whereas regular stainless steel maintains a density of 7.9 g/cm^3