Eight kinds of advanced materials were selected in the catalogue of Military Technology Transfer to civilian application

  Recently, the Ministry of Industry and Information Technology and the National Defense Bureau of Science, Technology and industry jointly issued a notice on the publication of the "military technology to civilian promotion catalogue (2018) " . In order to implement the opinions of the State Council General Office on promoting the deep development of the integration of military and Civil Defense Science, technology and industry, the circular said, focusing on six technical areas, including advanced materials, intelligent manufacturing, high-end equipment, new-generation information technology, new energy and environmental protection, emergency rescue and public safety, the Ministry of Industry and Information Technology of the Peoples Republic of China and the State Administration of Science, Technology and Industry for National Defense collected and selected 150"MILITARY-TO-CIVILIAN" technology achievements and compiled them into a "military-to-civilian technology promotion catalogue (2018) . ". The following is a brief introduction to some of the outstanding technical achievements in the field of advanced materials in the catalogue. 1. The third generation semiconductor silicon carbide new functional materials and power devices, technology brief introduction: Silicon Carbide functional materials have the characteristics of large bandgap width, strong critical breakdown field, high thermal conductivity, high saturation drift velocity and so on. Silicon Carbide functional materials are grown by PVT method, and the key technologies include temperature and temperature gradient control, raw material purification, Chemical-mechanical planarization, etc. . The silicon carbide power device has high breakdown voltage, low loss and high speed. Under the same application conditions, the system efficiency is higher and the volume is smaller. The Silicon Carbide SBD device adopts international common MPS technology and back thinning technology, the key technologies include surface electric field suppression technology, metallization, annealing, thinning technology and so on. Silicon Carbide MOSFET mass production products using a more mature, higher reliability of the plane gate process, key processes including gate oxidation. In the field of civil applications: mainly photovoltaic, new energy vehicles, high performance server power supply and other industries, in the photovoltaic industry, the main application of products for distributed solar inverter; in the field of new energy vehicles, the main applications include charging post, vehicle charger, vehicle DC DC, and motor driver. In the high performance server power industry, SBD products, mainly for PFC, can improve system efficiency to over 99% , the industry is currently the most widely used SIC industry.

  2. New lightweight high strength cast aluminum alloy material, technology brief: The new lightweight high strength cast aluminum alloy material is made by Aviation Industry Lanfei to make full use of military alloy technology in the process of industrialization of civil-military Integration Project, based on the relevant high strength casting aluminum alloy technology in China and abroad, and making full use of the precipitation of the company aviation military casting aluminum alloy technology, through the Alloy Formula Research, the composition function analysis, the proportion adjustment and the optimization, as well as the improvement of production technology and curing measures, a new lightweight high strength cast aluminum alloy material has been developed. ZL270LF casting properties and comprehensive mechanical properties are better than those of cast aluminum alloy made in China. Its tensile strength is over 450MPA and it has excellent ductility. At the same time, the Comprehensive Mechanical Properties are better than those of cast aluminum alloy materials published abroad. The tensile strength, yield strength, elongation and hardness of the material are better than those of domestic cast aluminum alloy, and the tensile strength, yield strength and specific strength are also better than those of structural steel, grey cast iron, low grade ductile iron and 20 # steel. Application: it can be widely used in aerial warfare and other military fields. It is also a rare choice material in the lightweight process of new energy automobile, high-speed railway, bullet train and other civil industries. 3. High quality and large size silicon carbide (SiC) single crystal substrate material, technical introduction: In the field of Silicon Carbide single crystal growth, the Technical Development Unit Uses Physical Vapor Phase Transfer (PVT) method to grow Silicon Carbide (SiC) single crystal, the temperature field is designed by using the computer simulation software of the design platform, and is verified and optimized by the actual single crystal growth, and the low defect density and low impurity control growth model is established to continuously improve the crystal growth process parameters, high Quality Silicon Carbide (SiC) single crystals with very low defect density were grown in batch. At the same time, the technology development unit uses multi-wire cutting technology to slice silicon carbide (SiC) single crystals, uses optimized Delle physical grinding technology to grind, and uses unique Chemical-mechanical planarization cleaning fluid to precisely Polish the wafers, batch production of high quality silicon carbide (SiC) single crystal substrate. The technology adopts the self-developed Silicon Carbide single crystal growth furnace, which overcomes a series of key technologies such as single crystal growth, defect control and substrate processing, and steadily produces high-quality silicon carbide single crystal substrate materials in batches, the product performance achieves the international advanced, the domestic leading level. Application: widely used in 5G communications, aerospace, Rail Transit, new energy vehicles, charging posts, power servers, frequency conversion appliances and solar inverters, etc. , to realize high efficiency, miniaturization and lightweight of power electronic system. 4. The technology and application of the composite insulation board made of nano-porous Silicon Dioxide Aerogel and rock wool: The technology adopts the new technology of the composite material made of nano-silicon Dioxide Aerogel to develop the series of fire-proof Insulation Board made of the Composite Board. Silicon Dioxide series products are made of super-fine inorganic fiber cotton, high-strength fiber thread, inorganic composite veneer material and inorganic waterproof sealing material through a special composite process. It is a Class A non-combustible fireproof material with high tensile strength and thermal conductivity from 0.020 to 0.300 W/(M K) . The main direction of the material development is to meet the requirements of the existing engineering specifications and the current construction specifications. MOXA plastic board contains a large number of long and thin fiber-reinforced structure, improve the overall stability of insulation board and Service Life, non-powdering, will not expand, long durability, and building the same life. The tensile strength of the new AEROGEL composite is more than 110KP and the water absorption is less than 0.2% . This product can be widely used in the field of building energy-saving traditional thin plastering technology, can solve the current market new National Standard Fire Design Code for a class of fireproof materials. 5. Manufacturing Technology, technology and application of copper-steel composite material: This technology adopts controllable atmosphere protection thermal composite technology, which combines copper and steel under high temperature and high pressure to form a new type of metal material. The copper-steel composite has a copper surface layer and a high-quality low-carbon steel core layer. It has copper-clad fastening, good shape, good deep drawing and electrical conductivity. Compared with ordinary steel, its corrosion resistance, oxidation resistance and surface quality are greatly improved, the utility model has the characteristics of similar performance and less copper consumption. Due to its high quality, good performance and low cost, the copper-steel composite material can be used to make all kinds of stamping and drawing parts, surface coverings and connectors, at present, it has become the best substitute material for brass and tin-phosphor bronze strip in electronics, communication, hardware, decoration, radiator and other industries. 6、 Carbon nano-angle by ARC method, technology brief introduction: 1 ~ 3 layers of carbon nano-angle, graphene, fullerene, Carbon nano-tube, nano-metal magnesium, 3d printing and other new materials were prepared by physical arc stripping method. In 2013, the first production line of physical arc stripping Carbon nano-angle and graphene was successfully developed. Through the Beijing environmental impact assessment in 2015, to achieve on-the-ground mass production. The carbon nano-angle of electric arc method is formed by using graphite rod as raw material in a closed machine through an instantaneous arc discharge to a high temperature of 5000 °C. The graphite rod material is automatically continuously stripped and attached to the substrate, the reaction is cooled in the reaction chamber by adding a clean gas. The single carbon nano-horn has a diameter of 2 ~ 5nm, a closed conical structure at one end and an opening at the other end. The length of the single carbon nano-horn is 10 ~ 20nm. There are three types of aggregates: Dahlia, Bud and seed, which are spherical aggregates with a diameter of 80 ~ 100 nm. Application: Carbon nano-angle has large specific surface area and hollow structure. It has broad application prospect in catalyst carrier, drug carrier, fuel cell and so on. At present, efforts are being made to realize the application of Carbon nano-angle in energy storage and catalyst support. 7. Synthetic Mica super-large crystal, technology brief introduction: The Crystal is a flat and transparent rectangular book-like single crystal with super-large size, the thickness can be divided in the range of 2 mm ~ 0.02 mm according to requirements, and it can withstand high temperature of 1100 °c; With strong acid, strong base does not occur any reaction; complete light transmission (pure transparent) . Compared with the traditional natural mica, the synthetic Mica super-large crystals have better corrosion resistance, resistance to long-term hot water erosion, high temperature resistance and transmittance. APPLICATION: Synthetic Mica Crystal can be used in electric insulation, high frequency medium, high temperature vacuum, high temperature and high pressure, strong acid and strong base, molecular biology research, DNA structure analysis, neutron reflection test and other working environment. Can Be widely used in electric power, aerospace, ships, nuclear, petrochemical, environmental protection and other fields. 8. New Material, technology and application of GRAPHENE: nitrogen-doped Graphene is prepared by DC ARC method using a mixture of ammonia and helium as reaction atmosphere. By the method of preparing the Graphene, the nitrogen-doped graphene can be prepared with high yield under low pressure and low current, and the production safety is high. The purity of the prepared graphene is over 97% , the number of layers is between 2 and 6, the size of graphene sheets is between 100 and 200 nm, and the spacing between layers is about 0.4 nm, which is characterized by transmission electron microscope. The production of nitrogen doped graphene has promising applications in catalyst carriers, lithium-ion battery and conductive films. Source: China Powder Website

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