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Under the situation of rapid development of science and technology, to prepare high-temperature, high-performance, new-type materials, the first thing to do is to solve the refractory materials needed in the preparation process. The characteristics of refractory materials are as follows: 1. Mechanical properties The elastic modulus of special refractory materials is large. Most have higher mechani...
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1. Nano cerium oxide improves the anti-ultraviolet aging performance of polymers The 4f electronic structure of nano CeO2 is very sensitive to light absorption, and the absorption band is mostly in the ultraviolet region (200-400nm). It has no characteristic absorption of visible light and has good transmittance. Ordinary ultra-fine CeO2 for UV absorption has long been used in the glass industry: ...
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1. Nano zinc oxide is an active agent and vulcanizing agent for rubber. Due to the small size effect and large surface effect of nano-materials, the function of nano-zinc oxide in rubber formulations is not only a high-active agent, but also improves wear resistance. It can improve the adhesive force of the rubber frame material, increase the deformation ability and reduce the heat generation and ...
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Application Analysis of Nano Tungsten Trioxide Nano WO3 yellow tungsten has a large specific surface area and significant surface effect. It is a good catalyst. It can be used as both a main catalyst and an auxiliary catalyst, and it has a high selectivity to the reaction. WO3 has a strong ability to absorb electromagnetic waves and can be used as an excellent solar energy absorbing material and r...
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Carbon nanotubes are simply classified according to the number of layers of graphene sheets: single-walled carbon nanotubes and multi-walled carbon nanotubes. The difference between the two is mainly reflected in: 1. Discover the time difference In 1991, when Li Ji-ma, an electron microscope expert in the Basic Research Laboratory of NEC Corporation, Japan, observed the C60 structure under a high-...
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Nano sized hydroxyapatite has stable performance under physiological environment, and its ability to induce new bone formation is unmatched by other materials. It is widely used in human bone bionic regeneration materials and hydroxyapatite coatings. Bone is the stent of the human body, participates in the metabolism of the whole body, and is an important part of the human movement system. However...
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1. The history of nano gold powder development In 1885, nano gold solution was often used as the main ingredient in the treatment of alcoholism in the United States; In 1890, Dr. Koch discovered that Mycobacterium tuberculosis could not survive on the surface of gold; Nano gold was used to treat arthritis in 1890; In 1935, Chicago surgical expert Edward et al. discovered that nano-gold solution ca...
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The singular properties of nanomaterials include: ①Surface effect The surface area of a spherical particle is proportional to the square of the diameter, and its volume is proportional to the cube of the diameter, so its specific surface area (surface area/volume) is inversely proportional to the diameter. As the particle diameter becomes smaller, the specific surface area will increas...
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As a new material of the technological revolution, ceramic materials have attracted the attention of some developed countries as early as more than ten years ago. The fatal shortcomings of ceramic materials are its brittleness, low reliability and low repeatability. These shortcomings have seriously affected the application range of ceramic materials. Only by improving the fracture toughness of ce...
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Aerospace super alloy parts processing solution 1. With traditional craftsmanship in aviation blade manufacturing and processing problems, metal 3D printing technology can solve the problem ingeniously 2. At the same time, under the premise of ensuring the function, the primary requirement of the lightweight aerospace industry for parts, metal 3D printing technology can easily realize the lightwei...
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Cu is a transition metal and has a special electronic structure and electronic gain and loss properties that are different from other metals. It can show good catalysis for different chemical reactions and is widely used in the field of catalysts. When the size of CuO particles is as small as nanometers, due to the special characteristics of multiple surface free electrons and high surface energy ...
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The phase change toughening of yttrium stabilized nano zirconia and the toughening effect of nanoparticles are used to improve the comprehensive mechanical properties of the alumina matrix. Adding different contents of nano 3Y-ZrO2 to the alumina matrix, the comprehensive mechanical properties of the material with a content of 15wt% of nano ZrO2 reach the best (flexural strength 766.74MPa, fractur...
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