TERBIUM CAS 7440-27-9

Medical: X-ray photography used to diagnose human bones and lungs must be done with terbium. To improve the sensitivity of X-ray negatives, it is necessary to emit fluorescence sensitizers when irradiated by X-rays. Tb3+ is used in Gd2O2S, a sensitizer that improves the sensitivity of the negatives.
Magnetic deflection: The material stretches and contracts in the direction of magnetization, that is, the change of size is called magnetic deflection, also known as magnetic distortion. Terbium-iron, terbium-dysprosium-iron has a large magnetic deflection effect, which is used in the print head and precision processing equipment of computer printers. The secret lies in the shape of the flat 4f electron cloud of terbium, and after the magnetic field is added, the movement of the electrons depends on the movement of the surrounding atoms that correspond to it.
Activator: Phosphors are used to activate green powders in trichromatic phosphors, such as terbium-activated phosphate matrix, terbium-activated silicate matrix, terbium-activated cerium-magnesium aluminate matrix, all emitting green light in the excited state.
Optical disk: As a computer recording medium, the optical disk uses the alloy of the heavy rare earth element-transition metal element series represented by the terbium-iron-cobalt alloy. When the laser is illuminated, information is written and read out using changes in the reflected light magnetized by the surface.
Magneto-optical storage materials, terbium magneto-optical materials have reached the scale of mass production, using Tb-Fe amorphous film to develop magneto-optical optical discs, as computer storage components, storage capacity increased by 10 to 15 times.
Magneto-optical glass: Faraday polarimetry containing terbium is a key material for the manufacture of rotators, isolators and rings that are used in laser technology. In particular, the development of terbium dysprosium ferrostrictive alloy (TerFenol),
Terfenol is a new type of material discovered in the 70s, half of the alloy is terbium and dysprosium, sometimes added holmium, the rest is iron, the alloy was first developed by the Ames Laboratory in Iowa, usa, when Terfenol is placed in a magnetic field, its size changes greater than the general magnetic material This change can make some precision mechanical movements to be realized. Iron terbium dysprosium began to be used for sonar and has been used in a variety of fields, from fuel injection systems, liquid valve control, micropositioning to mechanical actuators, mechanisms and plane space telescope regulation, wing regulators to the production of individual types of loudspeakers and other fields.
Terbium can also be used for non-destructive inspection of solder joints such as ships and pipelines.
Rare earth classes have many magnets and luminescent bodies, which are the rotation direction of electrons (4f electrons) and the migration of electron energy that take advantage of the particularity of rare earth classes. [4]
Small amounts of terbium are used in special lasers and solid-state components.