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Boron carbide has a high neutron absorption capacity. The neutron capture cross-section is high and the capture energy spectrum is wide. The thermal cross-section of 10B is as high as 347 × 10-24 cm2, second only to a few elements such as gadolinium, samarium, and cadmium. At the same time, compared with pure elements B and Gd, B4C is low in cost, does not produce radioisotopes, has low secondary ...
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1. Thermally conductive fillers commonly used in insulating polymers 1. Nitride filler and its application The nitride fillers are mainly aluminum nitride (AlN), boron nitride (BN) and silicon nitride (Si3N4), etc. due to their high thermal conductivity, good electrical insulation performance, excellent high temperature resistance and excellent dielectric properties, etc. Characteristics and widel...
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Nanotechnology has been successfully applied in China's medical field. A group in Nanjing used nano silver technology to develop and produce a medical dressing, a long-acting broad-spectrum antibacterial cotton. The production principle of this antibacterial cotton is to make silver into 20 nanometer ultrafine particles through nanotechnology, and then attach it to cotton fabric. Silver has the ef...
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By mixing a small amount of nano silica into concrete, ultra-high strength and ultra-high durability concrete can be easily prepared. At present, a large number of research results have proved that nano SiO2 has a good modification effect on cement. The cement paste doped with nano silica has reduced fluidity, shortened setting time, and significantly improved early strength. Nano-doped nano silic...
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Nanomaterials refer to materials in which at least one dimension in the three-dimensional space is in the nanoscale range or is composed of them as basic units. Nano-gold is a kind of nano-materials, which are nano-sized particles of gold, with a diameter generally between 1-100 nm. Nano gold has very special optical properties, which are mainly manifested in two aspects of light absorption and sc...
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The field of biomedicine is a brand-new research field formed by integrating the methods and theories of medicine, biology and other related disciplines. Its research content includes biomedicine, clinical applied chemistry, cytology and immunology. With the rapid development of technology, cutting-edge research and inventions in many popular fields play an important role in the field of biomedici...
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1. As a sensor material Nano TIO2 can be used not only for humidity and pressure sensitive components, but also as a sensor material to detect a variety of gases. For example, TIO2 can detect flammable gases such as H2, CO, and O2, and is especially used as an automobile exhaust sensor. By measuring the oxygen content in automobile exhaust, it can control the efficiency of automobile engines. 2. T...
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Precious metals refer to some rare and expensive metal materials, such as silver, gold, ruthenium, rhodium, palladium, platinum, iridium and other expensive metals. Nanomaterials refer to materials at the nanometer level on one-dimensional or multi-dimensional scales, such as nanowires and nanoparticles. Noble metal nanoparticles are nanomaterials composed of these noble metals, such as gold nanop...
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1. The lubricity of boron nitride Boron nitride came out more than 100 years ago. Its earliest application polymorph is hexagonal boron nitride as a high-temperature lubricant, abbreviated as: h-BN, or a-BN, or g-BN (that is, graphite boron nitride), Hexagonal boron nitride is absolutely smooth, and the friction coefficient between the powders is very low. Each layer of its atomic structure contai...
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At present, the world vigorously advocates green and sustainable development, and nano-titanium dioxide is an excellent inorganic fine chemical material. Nano-titanium dioxide has broad prospects in the application and development of pulping and papermaking and functional paper due to its functions of sterilization and disinfection, high-efficiency self-cleaning, photocatalytic energy, and wastewa...
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As a key member of non-metallic materials, ceramic materials have a large number of attractive properties, such as good mechanical and electrochemical properties, low thermal conductivity, dense and uniform structure, wear resistance and corrosion resistance, etc. The high specific stiffness, high specific strength and chemical inertness of ceramic materials in complex environments, and the low de...
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With human beings, there are wars against viruses and bacteria. Although every time we end up with human victory, we have paid a heavy price. At present, the common PM2.5 masks on the market can only filter the particles with a diameter of 2.5 microns in the air, while the N95 mask can block 95% of the particles with a diameter of 2.5 microns in the air. At present, it is from Sars, influenza, Ebo...
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