Rare earth is known as "industrial vitamin" the laudatory name, now has become an extremely important strategic resources, rare earth permanent magnetic materials is important materials for electronic communication technology, used in satellites, radar TWT, a circulator and micro motor, micro cassette recorder, aviation equipment, electronic watches, seismic instrument and other electronic instrument. Current rare earth permanent magnet application has penetrated into cars, household appliances, electronic meter, magnetic resonance imaging, audio equipment, micro motor, such as mobile phones. In medical treatment, the use of rare earth permanent magnetic materials for magnetic acupoint therapy, so that the effect is greatly improved, thus promoting the rapid promotion of magnetic acupoint therapy. In all fields of application of rare earth, rare earth permanent magnet material is one of the fastest developing speed. It not only to the development of the rare earth industry has brought tremendous impetus, but also to many of the relevant industries have a considerable impact. Starting in 2013, the relevant departments of China promulgated the dividend policy, to help the domestic medical equipment development, which accelerated the process of rare earth magnetic resonance imaging localization, for stimulating domestic consumption of rare earth to the positive role.
In 2012, the Baotou rare treasure Bo for independent research and development of Medical Systems Co., Ltd., with full intellectual property rights of the first high-performance 0.45t (Tesla) rare earth permanent magnetic resonance system of the successful completion of commissioning and sent to the Middle East. This marks the world's largest integrated permanent magnet resonance production base officially built the assembly line.
On October 20, 2014, by the Ningbo production of China's first domestically produced 1.5T magnetic resonance, officially in the city of Zhejiang University Hospital Hospital District station put into use.
February 2015, independently developed by Alltech Medical Systems Co., Ltd. China first 1775px large aperture superconducting magnetic resonance Echostar comfort 1.5T MRI, smoothly through the United States Food and Drug Administration (FDA) certification. In the past 10 years Sichuan magnetic resonance enterprises developed China's first with independent intellectual property rights of 1.5T superconducting magnetic resonance and broke in one fell swoop Ge, Siemens, and other multinational companies in the area for up to 30 years of technical monopoly; at present, the domestic each sold 3 sets of domestic magnetic resonance equipment, two from Sichuan, the global installed more than 200 sets.
Today's medical diagnosis of the most effective clinical diagnostic imaging equipment of magnetic resonance imaging (MRI) is a is used to check of various parts of the body, especially for tumor early diagnosis and soft tissue lesions and has the irreplaceable role. According to MRI imaging magnetic field formation can be divided into two kinds of MRI MRI superconducting magnet. Superconducting MRI magnetic field strength high, imaging in the physical environment is good, but the manufacturing process and cost of the "double high", the hospital can not be universal. In comparison, the popularity of permanent magnet MRI to large.
The advent of neodymium iron boron permanent magnets for the permanent magnet system has injected new vigor and vitality. Neodymium iron boron magnet magnetic energy product, is called today "permanent magnet king", with its excellent performance is widely used in electronics, machinery and other industries. Rare earth neodymium used in non-ferrous metal materials, in the magnesium alloy or aluminum alloy added 1.5 ~ 2.5% nd alloy are improved high temperature performance, air tightness and corrosion resistance, neodymium doped garnet produced a short wavelength laser beam, in industry widely used thickness 10mm thin materials in welding and cutting, in the medical, neodymium doped yttrium aluminum garnet laser instead of scalpel for the removal surgery or disinfect the wound, nd is also used to glass and ceramics, coloring and rubber additives.
Dysprosium can increase the coercivity of permanent magnet, dysprosium used as phosphor activators and trivalent dysprosium is a promising single luminescence center three color luminescent material activated ion, and dysprosium or is the preparation of giant magnetostrictive alloy telescopic TB dy Fe alloy necessary metal material, can make some mechanical motion precision activities to be implemented, dysprosium metal can be used as magneto optical storage material, with high speed recording and readout sensitivity.
The size change of terbium than the general magnetic material changes this change can make some precision mechanical movement can be achieved. Terbium dysprosium iron mainly used in sonar, has been widely used in many fields, from the fuel injection system, a liquid valve control, micro positioning to mechanical actuator, institutions and the plane space telescope regulation of wing regulator and other fields.
Pan Asia nonferrous metal exchange officially listed two rare varieties of dysprosium and terbium, a total of 30 million yuan products in last year by the end of October just listed just 24 seconds all sold out. This is Chinese investors for the first time in commercial storage mode into the rare earth industry. This is following in China from the beginning of 2010 formally redundant varieties of rare metal implement state reserve strategy, private capital first, in the form of commercial storage to participate in the protection of strategic resources to, in the future, with the rare earth downstream industry chain development is perfect with each passing day, purchasing and storage of commercial rare earth will also industry development to provide sufficient resources guarantee. (author: Wang Weizhi)