Network information of functional materials, the connection and difference between structural materi

First, the materials are different.

1. Structural materials.

Structural material is based on mechanical properties, in order to manufacture the material used in the manufacture of stressed components, of course, structural materials also have certain requirements for physical or chemical properties, such as gloss, thermal conductivity, radiation resistance, corrosion resistance, oxidation resistance, etc.

2. Functional materials.

Functional materials refer to materials that have specific functions through the action of light, electricity, magnetism, heat, chemistry, biochemistry, etc. In foreign countries, such materials are often referred to as functional materials, special materials or fine materials.

Functional materials cover a wide range of functions, including optical and electrical functions, magnetic functions, separation functions, shape memory functions and so on. In contrast to conventional structural materials, these materials generally have other functional properties in addition to mechanical properties (Modern Functional Materials and Their Applications).

Second, the classification is different.

1. Structural materials.

The rapid development of high-tech industries based on electronic information technology, such as modern communications, computers, information network technology, integrated micromechanical intelligent systems, industrial automation and home appliances, has promoted the research, development, and wide application of a series of information functional materials.

The research and development of structural materials with high specific strength, high specific stiffness, high temperature resistance, wear resistance, corrosion resistance and other properties is the main direction of the development of a new generation of high-performance structural materials. The material segment is huge and complex, involving about 70 A-share listed companies. According to the development direction of the main new materials, they are divided into three categories: new metal materials, new inorganic non-metallic materials, polymers and composite materials.

2. Functional materials.

1) Classification according to the chemical bonds of materials. It is divided into functional metal materials, functional inorganic non-metallic materials, functional organic materials and functional composite materials.

2) Classification according to the physical properties of materials. It is divided into magnetic materials, electrical materials, optical materials, acoustic materials, mechanical materials, chemical functional materials, etc.

3) Classification according to the application field of functional materials. It is divided into electronic materials, military materials, nuclear materials, materials for the information industry, energy materials, medical materials, etc.

Third, the application is different.

1. Structural materials.

Due to its light weight, good thermal stability and low thermal conductivity, it is widely used in energy conservation and environmental protection, machinery, metallurgy and chemical industry.

2. Functional materials.

According to the technical field of functional material application, it can be mainly divided into information materials, electronic materials, electrical materials, telecommunication materials, computer materials, sensing materials, instrumentation materials, energy materials, aerospace materials, and biomedical materials.

People use materials are the use of various characteristics of materials, that is to say, the use of material properties, the properties of materials include a lot, generally divided into physical properties, chemical properties, mechanical properties, process properties, etc., most of the general structural materials are used mechanical properties, including a part of physical properties and chemical properties, and functional materials often use physical properties and chemical properties, a certain material has special physical properties such as optical properties, magnetic properties, electrical properties, superconducting properties, Shape memory properties and special chemical properties such as catalytic properties, photosensitive properties, etc., in a word, functional materials are some materials with outstanding physical and chemical properties. The connection between structural materials and functional materials is relatively simple, that is, they are materials used by people to develop science and technology, explore science, and live in daily life.

A network is made up of nodes and wires that represent objects and their interconnections. Mathematically, a network is a type of graph, and it is generally considered to refer specifically to a weighted graph. In addition to the mathematical definition, a network has a specific physical meaning, that is, a network is a model abstracted from some kind of practical problem of the same type.

In the field of computer, the network is a virtual platform for information transmission, reception and sharing, through which the information of various points, surfaces and bodies is linked together, so as to realize the sharing of these resources.

Meaning: A network is made up of nodes and connections that represent objects and their interconnections. Mathematically, a network is a type of graph, and it is generally considered to refer specifically to a weighted graph. Physical definition, i.e., a network is a model abstracted from some real-world problem of the same type.

Stupid people like pigs' heads, there is a better answer.

5G communication equipment usually uses professional superconducting thermal materials for heat dissipation, and the main material composition includes special additives for thermal conductive gap filling, silicon-based thermal conductive insulation film, auxiliary materials for thermal conductive phase change and thermal conductive adhesives.

The thermal conductivity of the thermal conductive materials of the above-mentioned 5G communication equipment has been improved to a very high level of physical performance, and has been industrially produced, and the thermal conductivity has even reached 5 50W MK, with excellent performance.

In the 5G era, according to the current trend of miniaturization, ultra-thinness, and full-screen form, terminals have put forward higher requirements for supporting materials.

In view of the trend of 5G future materials, many domestic enterprises have participated, believing that the solution is inseparable from the research and development of new materials and circuit research, if the development of high dielectric constant, low loss, low cost, 3D form and even heat dissipation characteristics of the material, can greatly improve the efficiency of the terminal. There are two main trends:

1. Non-metallic structural materials: Because 5G has a high-frequency band of more than 6 Hz, signal transmission is easy to be interfered with, and the wireless charging function requires non-metallic materials such as 3D glass ceramics to be better realized, 3D glass ceramics have become the mainstream choice of back shell materials, and the future foldable mobile phones, flexible displays, etc. will use OLED or QLED, which needs to be combined with 3D glass to achieve.

2. Functional materials: Compared with 4G, signal transmission is one of the biggest bottlenecks of 5G. Whether there are materials with low loss, 3D bendability, high dielectric constant and even good heat dissipation performance directly affects the throughput of the whole machine and the speed of mobile phone data transmission.

Some functional materials are very suitable for high-frequency communication equipment, including antennas, filters, power dividers, phase shifters, etc.

The biggest difference between 5G and conventional wireless communication technology is the use of a large number of high-frequency electromagnetic wave signals, which requires the switching speed of components to be much faster than before. GaN is now generally considered to be an ideal material for 5G communication due to its fast switching speed, good thermal stability, and radiation resistance. Chinese scientists have successfully synthesized gallium nitride in the laboratory and are conducting industrial scale-up experiments.

Hope it helps.

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PBS is a new environmentally friendly material that is biodegradable.

In the field of polymer materials, PBS is a chemically synthesized biodegradable material, the full name in Chinese is polybutylene succinate. Materials that belong to the same class as it are polyvinyl alcohol (PVA), polycaprolactone (PCL), etc.

It can be used to manufacture degradable plastic products, including: compost bags, garbage bags, shopping bags, electronic packaging bags, mulch films, catering utensils, golf spikes, foam materials, etc.

Phosphate buffer of sodium (potassium) salts. The ingredients are sodium chloride, disodium phosphate, potassium dibasic phosphate, potassium chloride. There are also those that do not include potassium salt, and the components are sodium chloride, disodium hydrogen phosphate, sodium dihydrogen phosphate, and the pH is generally.

Abbreviations in biology.

PBS can be abbreviated for three solutions, namely:

1.phosphate buffered solution

2.phosphate buffered saline and.

3.Phosphate buffered sodium (phosphate buffered sodium) has different preparation methods, different pH values, and different biological effects.

Unless otherwise specified, PBS commonly used in biology is phosphate buffered solution.