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Results 61 - 70 of 886 for Pigments
  • Article - 23 Jul 2001
    Ancient Chinese and Hindus were familiar with mercury (Hg). The metal was also found in Egyptian tombs of 1500 BC. Mercury rarely occurs as such in nature.
  • Article - 20 Jul 2001
    In 1817, German chemist Friedrich Strohmeyer discovered cadmium from an impurity of zinc carbonate (ZnCO3). Cadmium derives from the Latin term ‘cadmia’ and the Greek word ‘kadmeia’, which are ancient...
  • Article - 17 Jul 2001
    Sir Humphrey Davy discovered barium as an element in 1808. In its elemental form it is soft and silvery white resembling lead. It belongs to the alkaline earth group and is chemically similar to...
  • Article - 11 Jan 2002
    Two main types of titanium dioxide are used industrially, rutile and anatase. Due to poor mechaincal properties they are generally used for optical properties as pigments for paints, plastics, ceramic...
  • Article - 2 Feb 2006
    Mercury porosimetry characterizes a material’s porosity by applying various levels of pressure to a sample immersed in mercury.
  • Article - 26 Feb 2002
    The debate over which of these coatings offers better protection has raged for years. While no direct comparison can be made the subject is discussed and the merits and problems associated with zinc...
  • Article - 29 Jul 2001
    Black was the first person to recognize magnesium (Mg) as an element in 1755. Later, in 1808, Davy isolated this element by evaporating mercury from a magnesium amalgam.
  • Article - 23 Jul 2001
    Uranium is a heavy, silver-white metal resembling nickel. It is malleable, ductile, slightly paramagnetic and pyrophoric when finely divided. Its main uses are as a nuclear fuel, radioactive isotope...
  • Article - 20 Jul 2001
    Cobalt is a brittle, hard metal white in appearance resembling nickel but with a bluish tinge instead of the yellow of nickel. It imparts hardness to steels and alloys. Radioactive cobalt 60 has many...
  • Article - 20 Jul 2001
    Bismuth is one of few metals that increase in volume upon solidification. It is the most diamagnetic of metals and has the second lowest thermal conductivity. Uses are catalysts, fire protection,...