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Results 1271 - 1280 of 1322 for Powders
  • 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 - 20 Jul 2001
    Calcium (Ca) is placed in group IIA of the periodic table along with St, Ba and Ra. The name calcium is derived from the Latin word “calas” meaning lime, which was known as early as the first...
  • 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 - 19 Jun 2001
    Since the turn of the century, the explosion of information technology has created a requirement for large quantities of high-quality fiber optic cables, which are thousands of kilometers long and 100...
  • Article - 14 Jun 2001
    Everything you need to know about condoms including history and origins, production, materials (natural rubber and synthetics such as latex and polyurethanes), testing methods, barrier properties,...
  • Article - 9 Jun 2001
    Thermal spraying is a generic name for a range of coating processes in which molten particles are accelerated toward a substrate using a variety of energy sources. The general process is defined and...
  • Article - 8 Jun 2001
    Superplastic forming is an alternative and novel method for producing dental implants. It is capable of producing complex prostheses that are lighter, more comfortable and stronger than similar...
  • Article - 8 Jun 2001
    Metal injection moulding is capable of producing large numbers of complex parts economically. Some of the types of parts this process is suited to are illustrated. The process is best described as a...
  • Article - 2 Jun 2001
    Tooth filling materials such as silver amalgams, resin-based composites and ion-leachable glass cements are covered. Cast metals, bonded restorations, ceramics and composite implant materials are also...
  • Article - 31 May 2001
    Chromium carbide compounds are produced by an aluminothermic reaction. They have applications in wear resistant coatings, welding electrodes, thermal spray, cutting tools and can be an alternative for...