This time, Shanghai Nanjiang Group will invest 267 million yuan in the early stage together with the Chongqing Research Institute of the Chinese Academy of Sciences to promote the industrialization of large-area, single-layer graphene projects, and give the hospital a large-scale single-layer graphene technology transfer fee of more than 210 million yuan. yuan. The project investment is not only the largest social capital investment ever obtained since the establishment of Chongqing Research Institute, but also the largest contracted project amount of single technology transfer in Chongqing in recent years.
It is understood that graphene is a monoatomic layer planar film composed of carbon atoms. It is the best material for conductivity and optical transparency discovered so far. It has good flexibility and new physicochemical properties in the next generation of nanoelectronics. Devices, ultra-high-speed transistors, solar cells, display technology, flexible touch screens and other fields have broad application prospects.
Under the auspices of the Chongqing Municipal Science and Technology Commission, the hospital has successfully produced the first 15-inch single-layer graphene in China, which has reached the highest level in China. At the same time, the institute also produced the only 7-inch graphene touch screen in China, which has higher light transmittance, lower power consumption, more stable performance and thinner overall than the transparent conductive film ITO currently on the market. Light and foldable.
It is understood that the two sides will jointly establish Chongqing Moxi Technology Co., Ltd. to promote the application of graphene industrialization with the company as the carrier, and strive to complete the first phase production line and put into production in one year, forming 10 million large-area, single-layer graphene. The production capacity, the output value of hundreds of millions.
Wang Dong said that they will also set up an investment company in Chongqing to build an investment platform for the graphene industry. The first phase will invest 200 million yuan. At the same time, it is hoped that through the construction of graphene production line, more graphene application enterprises will be attracted to Chongqing to develop the downstream application products of graphene. These companies can use graphene to make touch screens and replace silicon to make faster and higher CPUs, nanoelectronic devices, photonic sensors, transistors and other new materials. In Chongqing, we will build a graphene-based ground that integrates R&D, production and sales.
About graphene
Graphene is a new material of a single-layer sheet structure composed of carbon atoms. It is a planar film composed of a carbon atom and a hybrid orbital hexagonal honeycomb crystal lattice, and has a two-dimensional material with a carbon atom thickness. Graphene has always been considered a hypothetical structure and cannot be stabilized alone until 2004, when the physicists of the University of Manchester, André Heim and Konstantin Novoselov, succeeded in experimenting with graphite. Graphene was isolated, and it was confirmed that it could exist alone. The two also won the 2010 Nobel Prize in Physics for their "creative experiment in two-dimensional graphene materials."
Graphene is currently the thinnest but hardest nanomaterial in the world. It is almost completely transparent, absorbing only 2.3% of light; its thermal conductivity is as high as 5300W/m·K, higher than that of carbon nanotubes and diamonds, and its electrons at normal temperature. The mobility is over 15000cm2/V·s, which is higher than that of carbon nanotubes or silicon crystals, and the resistivity is only about 10-6 Ω·cm, which is lower than that of copper or silver. It is the material with the lowest resistivity in the world. Because of its extremely low resistivity and extremely fast electron mobility, it is expected to be used to develop a new generation of electronic components or transistors that are thinner and faster. Since graphene is essentially a transparent, good conductor, it is also suitable for making transparent touch screens, light panels, and even solar cells.
small fan
DC Fan is through the input DC power, so that the DC motor rotates to drive the fan impeller rotation, in order to achieve DC to mechanical energy conversion process fan. The biggest feature of Dc Fan is the optional DC motor.
Introduction
At present, DC fans use more DC brushless motors. Brushless DC motors eliminate the need for slip rings and brushes for excitation and greatly simplify the structure. At the same time, it not only improves the processability of the motor, but also greatly enhances the mechanical reliability of the motor operation and increases the service life.
At the same time air gap flux density can be greatly improved, the motor indicator can achieve the best design, the direct effect of the motor is reduced in size and weight. Not only that, but also has very good control performance compared to other motors. This is because: First, the torque constant, moment of inertia ratio, power density and the like of the motor are greatly increased due to the high performance of permanent magnetic materials. Through rational design and can make the moment of inertia, electrical and mechanical time constants and other indicators greatly reduced, as a major indicator of servo control performance has been greatly improved. Second, the design of modern permanent magnetic circuit has been more perfect, coupled with the high coercivity of permanent magnetic materials, and thus permanent magnet motor anti-armature reaction and its anti-demagnetization greatly enhanced the control parameters of the motor with the external Disturbance effect greatly reduced. Thirdly, since the permanent magnet replaces the electrical excitation and the design of the field winding and the field magnetic field is reduced, the parameters of the field flux, the field winding inductance and the field current are reduced, thereby directly reducing the controllable variable or the parameter. Based on the above factors can be said that permanent magnet motor with excellent controllability.
At present, large-capacity fan air flow control has been a lot of frequency control methods, this type of inverter mainly rely on imports, expensive. Currently 1kw below the power level of fans, especially home air conditioners and other fans have permanent magnet brushless DC motor drive, and the use of speed control air volume method. 1 ~ 10kw power range of the huge amount of fan, the basic induction motor drive, and adjust the outlet opening to adjust the amount of wind. For fans in this power range, using permanent magnet brushless DC motor drives to replace the original induction motor drive has great advantages.
DC Fan
Dc Fan,Dc Cooling Fan,Plastic Dc Fan
Shenzhen Fu Sheng Electric Co., LTD. , http://www.fushengfan.com