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  2. Cement - Wikipedia

    en.wikipedia.org/wiki/Cement

    The presence of heavy metals in the clinker arises both from the natural raw materials and from the use of recycled by-products or alternative fuels. The high pH prevailing in the cement porewater (12.5 < pH < 13.5) limits the mobility of many heavy metals by decreasing their solubility and increasing their sorption onto the cement mineral phases.

  3. Binder (material) - Wikipedia

    en.wikipedia.org/wiki/Binder_(material)

    A binder or binding agent is any material or substance that holds or draws other materials together to form a cohesive whole mechanically, chemically, by adhesion or cohesion. More narrowly, binders are liquid or dough-like substances that harden by a chemical or physical process and bind fibres, filler powder and other particles added into it.

  4. Refractory metals - Wikipedia

    en.wikipedia.org/wiki/Refractory_metals

    For the production of the tungsten heavy alloy, binder mixtures of nickel and iron or nickel and copper are widely used. The tungsten content of the alloy is normally above 90%. The diffusion of the binder elements into the tungsten grains is low even at the sintering temperatures and therefore the interior of the grains are pure tungsten. [18]

  5. Cemented carbide - Wikipedia

    en.wikipedia.org/wiki/Cemented_carbide

    The coefficient of thermal expansion of cemented tungsten carbide is found to vary with the amount of cobalt used as a metal binder. For 5.9% cobalt samples, a coefficient of 4.4 μm/m·K was measured, whereas 13% cobalt samples have a coefficient of around 5.0 μm/m·K.

  6. Heavy metals - Wikipedia

    en.wikipedia.org/wiki/Heavy_metals

    Heavy metals is a controversial and ambiguous term [2] for metallic elements with relatively high densities, atomic weights, or atomic numbers.The criteria used, and whether metalloids are included, vary depending on the author and context and has been argued should not be used.

  7. Staple (fastener) - Wikipedia

    en.wikipedia.org/wiki/Staple_(fastener)

    A heavy duty office staple might be designated as F1667 STFCC-04: ST indicates staple, FC indicates flat top crown, C indicates cohered (joined into a strip), and 04 is the dash number for a staple with a length of 0.250 inch (6 mm), a leg thickness of 0.020 inch (500 μm), a leg width of 0.030 inch (800 μm), and a crown width of 0.500 inch ...

  8. Dimercaprol - Wikipedia

    en.wikipedia.org/wiki/Dimercaprol

    Dimercaprol is a chelator and works by binding with heavy metals. [3] It has a very pungent odor. Dimercaprol was first made during World War II. [5] It is on the World Health Organization's List of Essential Medicines. [6]

  9. Tungsten carbide - Wikipedia

    en.wikipedia.org/wiki/Tungsten_carbide

    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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