Molybdenum compounds aerosol maximum allowable concentration of 2mg / m, the dust is 4mg / m. Access to and use of molybdenum alloys When sodium required to wear protective equipment . Pay attention to moisture . Transportation beware of rain, sun Uses: used in the manufacture of alkaloids , ink , fertilizers , molybdenum red pigment and pigment Fast precipitant Metal catalyst , molybdenum bar salts , can also be used to make flame retardant and suppression of pollution- water system Preparation , also used as galvanizing , polishing agents and chemical reagents.
Molybdenum carbide has a high melting point and hardness, good thermal stability and mechanical stability, and excellent corrosion resistance and other characteristics. Molybdenum is a silvery white refractory metal, a melting point of 2615 ℃, density of 10.2 g / cm 3, the expansion coefficient is small, a special tube is almost the same coefficient of expansion of the glass. Molybdenum stable at room temperature is higher than 600 ℃, rapidly oxidized.
2014年3月23日星期日
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