In 1886, the Frenchman Boise Baudelaire successfully separated holmium into two elements, one still known as holmium, and the other named dysrosium based on the meaning of "difficult to obtain" from holmium (Figures 4-11). Dysprosium is currently playing an increasingly important role in many high-tech fields. The main uses of dysprosium are as follows.
(1) As an additive for neodymium iron boron permanent magnets, adding 2% to 3% dysprosium can improve its coercivity. In the past, the demand for dysprosium was not high, but with the increasing demand for neodymium iron boron magnets, it became a necessary additive element, with a grade of 95% to 99.9%, and the demand is also rapidly increasing.
(2) Dysprosium is used as an activator for phosphors, and trivalent Dysprosium is a promising activating ion for single emission center tricolor luminescent materials. It is mainly composed of two emission bands, one is yellow emission, and the other is blue emission. Dysprosium doped luminescent materials can be used as tricolor phosphors.
(3) Dysprosium is a necessary metal raw material for the preparation of large magnetostrictive alloy Terfenol, which can enable precise mechanical movements to be achieved.
(4) Dysprosium metal can be used as a magneto-optical storage material with high recording speed and reading sensitivity.
(5) For the preparation of dysprosium lamps, the working substance used in dysprosium lamps is dysprosium iodide. This type of lamp has advantages such as high brightness, good color, high color temperature, small size, and stable arc. It has been used as a lighting source for movies, printing, and other lighting applications.
(6) Dysprosium is used to measure neutron spectrum or as neutron absorber in atomic energy industry because of its large neutron capture cross section.
(7) DysAlsO12 can also be used as a magnetic working substance for magnetic refrigeration. With the development of science and technology, the application fields of dysprosium will continue to expand and extend.
Post time: May-05-2023