2013年7月31日星期三

Molybdenum powder metallurgy and the subsequent preparation of the deformation process.


Using isostatic pressing the mixed powder made of molybdenum plating green. The compacts in hydrogen protective atmosphere 2000-2200 ° C high temperature sintering. Sintered billet in the temperature range of 1200-1500 ° C rolling. Density of the material increases with increased amount of deformation. The melting point of pure molybdenum 2620 ° C. High melting point, high temperature strength make the material available in 1900 ° C high temperature.
      Tube industry: for the borosilicate glass tube with vacuum sealed connection molybdenum wire, molybdenum especially polished prongs; made ​​by the molybdenum wire can withstand the tremendous heat stress grille; used to improve the electron emission characteristics the gold-plated molybdenum wire; launch tube tetrode short, high-power electron tube such as a tetrode anode, the auxiliary anode, a cathode supporting member, and other structures; microwave magnetron molybdenum and molybdenum pins, etc., an end cap.
Semiconductor Technology: Molybdenum similar coefficient of thermal expansion of silicon, molybdenum, and the semiconductor element of the transistor has been widely application. Molybdenum silicon wafer used as a substrate, a cathode side connecting molybdenum wafer and ring.
Switches and contacts: mercury switches and relays special telephone contacts.
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