Cerium And Cerium Tungsten Electrodes

Cerium is a chemical element , its chemical symbol Ce, atomic number 58 , atomic weight 140.115 , belonging to the lanthanide elements, but also one of the rare earth elements . Element name comes from the asteroid Ceres, the English name . 1803 German chemist Klaproth , Swedish chemist Berzelius discovered the cerium oxide , respectively . Cerium has four kinds of natural stable isotopes : cerium 136,138,140,142 . Cerium content in the crust of about 0.0046% , is the most abundant of the rare earth elements . Gray soft metal . In monazite accounted for over 40% of total rare earth . Cerium chemically active , firing in air using Daogua ie , soluble in acid , insoluble in alkali . Cerium is iron gray metallic , malleable , melting point 799 ° C, the boiling point of 3426 ° C, density of 6.657 g / cm ³. Cerium is in addition to the rare earth elements europium outside the most active . Cerium oxide at room temperature, it is easy ; slow decomposition in cold water , hot water reaction speed ; most cerium salt solution as its orange-red to orange-yellow , with a strong anti- magnetic properties and oxidation. Cerium oxide for polishing precision glass products, but also do glass to color agent and used to produce colored glass , cerium nitrate used in the manufacture incandescent hood .

Cerium tungsten electrodes in tungsten adding rare earth cerium oxide powder metallurgy and rolling through grinding and polishing process made of tungsten electrode products, is the earliest production of non-radioactive tungsten electrodes product that is characterized by the low current conditions has excellent arc performance , dimensional arc current is small . Therefore, it is commonly used in pipes, stainless steel products and welding of small precision parts . Conditions at low current DC electrode diameter 2.0mm or less , cerium tungsten electrodes thorium tungsten electrode is preferred alternatives.


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