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Ce is cerium metal, the rare earth element with the most abundant reserves. It is a silver-gray active metal. It is a lanthanide element of the ΙΙΙ group of the periodic system. The element symbol is Ce. reducing agent.
The content of cerium in the earth's crust is about 0.0046%, which is the highest abundance among rare earth elements. Cerium mainly exists in monazite and bastnaesite, and also exists in the fission products of uranium, thorium and plutonium. It is often obtained by reducing cerium oxide with magnesium powder, or by electrolysis of molten cerium chloride.

1. Oxidant. Catalysts for organic reactions. Iron and steel analysis as a rare earth metal standard. Redox titration analysis. Decolorized glass. Glass enamel sunscreen. Heat resistant alloy.
2. It can be used as an additive in the glass industry, as a grinding material for plate glass, and can also be used in cosmetics to play an anti-ultraviolet role. At present, it has been expanded to the grinding of spectacle glass, optical lenses, and picture tubes, and plays the role of decolorization, clarification, and absorption of ultraviolet rays and electron rays of glass.

Cerium tungsten is a non-radioactive substance. It can not only replace the thoriated tungsten electrode in the case of low current and small scale direct welding, but also inherit the superior performance of the latter. It is known to be good for DC low current welding because it is easier to start than thorium material and usually requires about 10% of the ampere required for thorium tungsten material, which is very popular and is used for rail welding of pipe, pipe , the welding cycle is short, also known as a specific number of welds, very small parts, it is necessary to replace the electrode.