In 1886, the Frenchman Pois Baudley succeeded in separating the cockroach into two elements, one still called é’¬, and the other named dysprosium according to the meaning of “hard to get†from é’¬.é• is currently playing an increasingly important role in many high-tech fields.
Dy main purpose is: (1) as an additive, a neodymium-iron-boron permanent magnets, adding about 2 to 3% of dysprosium in this magnet, the coercivity can be improved, the demand for the past little dysprosium, However, as the demand for NdFeB magnets increases, it becomes a necessary additive element, and the grade must be around 95 to 99.9%, and the demand is also rapidly increasing. (2) é• is used as a phosphor activator. Trivalent cerium is a promising active ion of a single luminescent center trichromatic luminescent material. It is mainly composed of two emission bands, one for yellow emission and the other for blue light. The emitted, erbium-doped luminescent material can be used as a trichromatic phosphor. (3) Preparation of dysprosium is necessary magnetostrictive metal bonding material Terfenol gold (of Terfenol) alloy, a number of precision moving mechanical motion can be achieved. (4) Base metal can be used as a magneto-optical storage material with high recording speed and reading sensitivity. (5) Preparation of the lamp for the dysprosium, used in the working substance is dysprosium iodide, dysprosium lamp, which lamp has high brightness, good color, high color temperature, small size, arc stability, etc., has been used in film, printing And other lighting sources. (6) Because the cerium element has a large neutron capture cross-sectional area, it is used in the atomic energy industry to determine the neutron energy spectrum or to make a neutron absorber. (7) Dy3Al5O12 can also be used as a magnetic working substance for magnetic refrigeration. With the development of science and technology, the application fields of é• will continue to expand and extend.
Dy main purpose is: (1) as an additive, a neodymium-iron-boron permanent magnets, adding about 2 to 3% of dysprosium in this magnet, the coercivity can be improved, the demand for the past little dysprosium, However, as the demand for NdFeB magnets increases, it becomes a necessary additive element, and the grade must be around 95 to 99.9%, and the demand is also rapidly increasing. (2) é• is used as a phosphor activator. Trivalent cerium is a promising active ion of a single luminescent center trichromatic luminescent material. It is mainly composed of two emission bands, one for yellow emission and the other for blue light. The emitted, erbium-doped luminescent material can be used as a trichromatic phosphor. (3) Preparation of dysprosium is necessary magnetostrictive metal bonding material Terfenol gold (of Terfenol) alloy, a number of precision moving mechanical motion can be achieved. (4) Base metal can be used as a magneto-optical storage material with high recording speed and reading sensitivity. (5) Preparation of the lamp for the dysprosium, used in the working substance is dysprosium iodide, dysprosium lamp, which lamp has high brightness, good color, high color temperature, small size, arc stability, etc., has been used in film, printing And other lighting sources. (6) Because the cerium element has a large neutron capture cross-sectional area, it is used in the atomic energy industry to determine the neutron energy spectrum or to make a neutron absorber. (7) Dy3Al5O12 can also be used as a magnetic working substance for magnetic refrigeration. With the development of science and technology, the application fields of é• will continue to expand and extend.
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