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[Chemical Knowledge]：What are the upstream raw materials for terbium oxide? What do the downstream products contain?

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Terbium oxide is an important rare earth compound, which is widely used in chemical industry, electronics, optics and other fields. In the field of raw materials for chemical production, the upstream and downstream related products of terbium oxide mainly include the following categories:

upstream products:

1. rare earth ore: terbium oxide is mainly extracted from rare earth ore. Rare earth ores include light rare earth ores and heavy rare earth ores, and the heavy rare earth ores have a high content of terbium.
2. Hydrochloric acid: In the production process of terbium oxide, it is necessary to use hydrochloric acid to dissolve rare earth ores in order to extract terbium ions.
3. Sodium hydroxide: Sodium hydroxide is used to adjust the pH of the solution to precipitate terbium ions as hydroxides.

downstream products:

1. fluorescent powder: terbium oxide can be used as an activator of fluorescent powder, used to make green long afterglow fluorescent powder, with high brightness, long afterglow time and other characteristics, widely used in displays, lighting and other fields.
2. fiber amplifier: terbium oxide can be used as a doping element of fiber amplifier, used to improve the amplification performance of optical fiber, is an important material in the field of optical fiber communication.
3. Magnetic materials: terbium oxide can be combined with other rare earth elements to make high-performance magnetic materials, which can be used in motors, maglev trains and other fields.
4. Catalyst: Terbium oxide has good catalytic performance and can be used as a catalyst for petroleum cracking, automobile exhaust purification and other fields.

In short, terbium oxide has an important position in the field of chemical production raw materials, and its upstream and downstream related products are extensive, which plays a positive role in promoting the development of related fields.

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