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The growth of mobile phones must increase the capacity of mobile switches and the number of ground stations; mobile phones can be used nationwide, and mobile communication ground stations must be added to cover the vast territory.
Magnetic materials for mobile communication can be classified into three categories: ferrite microwave devices, ferrite soft magnetic devices, and permanent magnet components.
The first category, microwave devices. Microwave devices include high power circulators for base stations, isolators, and small surface mount circulators and isolators for mobile phones. For example, Motorola's 900 MHz cluster system base station uses dozens of double junction isolators. At present, some domestic production enterprises basically use imported components, and the number of devices used in base stations is about 100,000, and the number of devices used in mobile phones is tens of millions.
The second category, soft ferrite. The soft ferrite element is mainly a magnetic antenna for radio paging, an electromagnetic compatibility core for a mobile phone, such as a magnetic core for anti-parasitic oscillation in a high frequency band, a magnetic core for a mixer, a magnetic core for a coupling coil, and a chip inductor. Etc., for these components, the domestic can not meet the supply requirements, mainly by imports.
The third category, permanent magnet components. It is mainly used for sound-emitting devices and receivers of mobile phones, and most of them currently use rare earth neodymium iron boron devices. Domestic products basically meet the requirements in terms of performance, but efforts are needed in anti-oxidation coatings.
Program-controlled switches are becoming smaller. In 2006, China's program-controlled switch sales are expected to reach 63.87 million lines, and mobile communication base station equipment reaches 9.6 million channels. The miniaturization and unmanned management of mobile switches requires a wide temperature range, low power loss and high permeability ferrite soft cores, which require high performance. At present, the magnetic core imported from abroad is mainly used on the aircraft. The magnetic core produced in China is basically the same as the performance of similar materials in the world, but the appearance quality of the product is poor and cannot be accepted in large quantities. The program-controlled switch requires high-frequency low-loss materials for power supply, chip inductors for surface mount technology, LC filters, chip hybrid circuit devices, and 12000 to 15000 high-permeability materials and saturation for coupling transformers. Magnetic double 5000 material.
Fixed telephones are moving towards cordless and visual. At present, China is a big country in telephone production. In 2005, its output reached more than 200 million units, and its output was 19,800 units (including 96,223,700 cordless phones, accounting for 50%). By 2010, China's telephone production reached 300 million units. Digital cordless phones are currently becoming mainstream in Western developed countries, accounting for 50% of the total. Cordless telephones must have high-definition call quality, effective prevention of eavesdropping, anti-jamming, large range of calls, low power consumption, and low environmental protection. High magnetic permeability and low power loss soft ferrite are required as power materials and anti-interference electromagnetic compatibility components. The improvement in call quality requires high magnetic energy products and high coercivity magnets for sounders, speakers and receivers to ensure reliability and stability.
Computer market:
Rare earth permanent magnets and soft ferrites show their talents
China has now become an important computer production and export base in the world, especially in the period of rapid growth of notebook computers. In 2005, the output of China's microcomputers was 80.84 million units, of which 58 million were notebook computers and 4,135 were exported. Computer is one of the main application fields of ferrite soft magnetic and rare earth permanent magnets, and the development of computer technology has promoted new changes in magnetic materials.
As the clock frequency of electronic components in notebook computers increases and miniaturizes, the components of the application must also be correspondingly high-frequency and chip-shaped, such as a ferrite soft-magnetic common-mode filter that reduces noise generated between the power line and the ground. a chip bead filter that removes higher harmonic noise components that distort digital signals,
The noise shielding absorber, the noise filter clamped on the cable, the DC voltage supplied by the battery becomes the DC voltage of the DC-DC converter required for the DC voltage of the circuit, and the DC-AC inverter for the high AC voltage of the LCD backlight The device needs to greatly reduce the magnetic loss to achieve a low-heating, energy-saving ferrite transformer core, HDD/DVD/FDD driver, giant magnetoresistive head, voice coil motor magnet, spindle motor, and magnet for optical pickup motor. , IEEE1394/USB interface anti-jamming chip bead, common mode filter core, mainly used for acoustic devices and fan motor magnets, which requires thin and high performance NdFeB materials.
At present, in the display market, the liquid crystal display market has shown a strong growth momentum, and the market sales reached a record high, occupying a dominant position in the display market. Liquid crystal displays are typical digital consumer electronics that provide some of the most important magnetic electronic components to make flat-panel displays thinner, higher quality, and lower electromagnetic noise. Three-terminal filter: A component that uses a choke on a single chip and a capacitor to eliminate noise, which can be used to prevent video picture quality degradation. Choke, chip inductor: used to eliminate the high frequency noise of the DC-DC converter, also used as a low-pass filter. Clamp filter: The filter core is divided into two boxes and the filter is mounted on the cable to eliminate noise. Chip Bead: A noise filter that reduces high frequency noise. DC-AC Converter: Converts DC power to high-voltage AC to illuminate the backlight of the LCD. Piezoresistors: Absorb surges (abnormal high voltage) and static electricity to prevent malfunction or damage to electronic circuits.
Automotive and electric bicycle market:
The ferrite motor part will be replaced by NdFeB
China's automobile production in 2006 is expected to be 6.4 million units, and will increase to 10 million units by 2010, making it the third largest producer in the world. At present, there are about 41 ferrite permanent magnet motors for each automobile. In the future, the car will be developed in the direction of miniaturization and light weight, and some of them will be replaced by neodymium iron boron magnets. With the widespread use of high-intensity discharge lighting and automotive power supply to 42 volts, the application of wide temperature, high frequency, low loss ferrite soft magnetic in DC-DC transformers has increased rapidly. In particular, electric vehicles and hybrid vehicles are developing rapidly. Domestic and foreign auto companies are striving to overcome high-efficiency electric drives and high-efficiency motors. Toyota has successfully developed the PRIUS utility hybrid car. The magnets in the international auto market are basically not. China’s share, the domestic market, is mostly imported.
Hybrid vehicles mainly use magnetic materials, such as electric DC-DC converters: resonant circuits are used to increase efficiency and reduce noise. High power is supplied through a parallel internal converter. Led display: Since its introduction, organic electroluminescent displays have been characterized by long life, high definition and low energy consumption, bringing new applications for power cores. Ferrite Magnets: Ferrite magnets are key components for high reliability and low cost of automotive engines. NdFeB magnets: NdFeB magnets are tens of times more magnetic than ferrite magnets for ABS wheel sensors and hybrid/fuel cell automotive motors. In addition, in a car in which a large number of electronic circuits are incorporated in a limited space, the electronic circuit is easily interfered by electromagnetic wave noise, and the EMC core is the best countermeasure.
Car navigation systems are considered the "brains" of cars and are increasingly computerized. The evolution of its capabilities is fast, including the storage of data from DVDs to mobile hard drives. Magnetic materials are mainly DC-AC inverters, DC-DC converters, EMC noise filters and HDD and DVD motor magnets.
The energy-saving and environmental protection of electric bicycles has become a new growth point in China. The current production of electric bicycles in China is 3 million vehicles/year, and it is estimated that it will grow to 15 million vehicles in 2010. The technology of electric bicycles has matured. The development trend is that the technology of high-power DC motors needs to be further improved, such as reducing current and energy consumption, in order to extend and expand the effective mileage of the battery.
Consumer Electronics Market:
High-grade soft ferrite is the mainstream
Consumer electronics has always been the largest market for magnetic materials in China, but consumer electronics has undergone qualitative changes. Flat-panel TVs have replaced traditional CRT TVs, and the digital trend has become mainstream, causing some old products to gradually lose market.
Color TV has always dominated China's consumer electronics products, with global production of around 170 million units, and will reach 200 million units by 2010; China's output will reach 80.83 million units, and by 2010 it will exceed 100 million units. Future development hotspots are high-definition, large-screen and digital-to-digital transitions, with flat-panel TVs accounting for around 60%. This is more stringent for magnetic material products: 1. The frequency is high, and the ferrite power core is required to have a higher operating frequency. 2. High definition, requiring power transformer power stability, material power loss is small, saturation magnetization is large. 3. The image is stable and the color is bright. It is required to use high magnetic permeability material and anti-electromagnetic interference soft magnetic core and high performance focusing sheet. 4. The development of digitalization, the requirements for power loss, magnetic permeability and frequency of use of soft magnetic materials are higher than those of analog. 5. The International Energy Agency stipulates that the standby power of color TVs should be reduced to 1 watt, which puts new demands on low-loss power ferrite materials. From the development of color TV market in the future, high-grade soft ferrite will account for 80% of the total.
Digital devices include DVDs, digital camcorders, and digital cameras. Global digital camcorders, digital cameras, digital recorders, and other automatic cameras and audiovisual devices are growing rapidly. Digital cameras basically replace the original traditional optical cameras, DVDs replace VCDs and tape projectors, and digital cameras replace tapes with hard disks and DVDs. These digital products combine liquid crystal display, magnetic recording and image processing, and require small magnetic components with good noise resistance and interference, and most of them use patch components.
Green lighting project. Green lighting projects mainly use low-energy light bulbs, basically fluorescent lamps with electronic ballast technology. At present, the domestic (including sole proprietorship, joint venture processing enterprises) production capacity is about 500 million, and will increase to 1 billion by 2010. Recently, in the field of lighting engineering, in order to further save energy, semiconductor light-emitting diodes (LEDs) have been used. As is generally popularized in this respect, the demand for ferrite soft magnetic is extremely large.
Green. Household appliances, including electric kitchen appliances, vacuum cleaners, hair dryers, massagers, electric toys, ventilation fans, etc., on the one hand, the demand for permanent magnets is increasing; and the electromagnetic waves generated by the various types of electrical appliances It has caused environmental electromagnetic pollution. Foreign countries have already mentioned green environmental protection as the first job, and it is forbidden to sell electrical appliances without electromagnetic compatibility and electromagnetic interference.
The development of mobile phones to multimedia and 3G has become the development trend of the mobile communication industry. According to statistics from the Ministry of Information Industry, there are currently more than 420 million mobile phone users in China, and they are growing at a rapid rate of 5.48 million users per month. Nowadays, the functions of mobile phones are constantly expanding. The development of multimedia mobile phones integrating photography, MP3, MP4 and TV functions will become mainstream. China's multimedia mobile phone shipments are 27 million. In the next few years, the development of China's 3G mobile phone will be the focus, and the output will exceed the GSM standard. Due to the increase in the functionality of mobile phones and the improvement of technology, higher requirements are placed on the performance of magnetic materials. Magnetic materials must meet the requirements of high frequency, miniaturization, chipping, high magnetic performance, low loss and immunity to electromagnetic interference.