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The value of nanomaterials is not only limited to its good performance in the information industry, biomedicine, aerospace and environmental protection, etc., but also that it can go deep into the details of life, and through the transformation of traditional manufacturing, it will have a subtle impact on human clothing, food, housing and transportation. Materials are the material basis for all te...
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Supercapacitor is a new type of energy storage element, which is widely used in starting power supply, pulse power supply, military, mobile communication device, computer and electric vehicle due to its advantages of large capacity, fast charging and discharging of large current, and long cycle life. and other research fields. According to the different energy storage mechanisms, supercapacitors c...
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Manganese dioxide (chemical formula: MnO2) is a black or brown solid, the most stable oxide of manganese, and is often found in pyrolusite and manganese nodules. Pylusite is the main mineral containing manganese; manganese nodules (submarine rock solids) also contain manganese. Manganese dioxide is mainly used to make dry batteries, such as carbon-zinc batteries and alkaline batteries; it is also ...
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1.physical properties Appearance and properties: black or black-brown crystalline or amorphous powder Relative molecular mass: 86.94 Chemical formula: MnO2 Melting point (℃): 535 (decomposition) Relative density (water=1) 5.03 Boiling point (°C): 535°C Solubility: insoluble in water, insoluble in nitric acid Storage: Store in an airtight and cool place 2.chemical properties Manganese dioxide is th...
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Manganese dioxide, also known as "manganese peroxide", "black manganese oxide", is a black orthorhombic crystal or brown-black powder, and there are many variants. Insoluble in water, nitric acid, cold sulfuric acid and acetic acid, soluble in cold and concentrated hydrochloric acid to generate unstable light brown-green MnCl4, which is heated and reacted with concentrated hydrochloric acid to rel...
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In building energy conservation, the light transmission and heat insulation of glass is a very critical issue. In buildings with transparent ceilings and large-area exterior windows, the thermal radiation of sunlight will lead to an increase in the energy consumption of air conditioners, resulting in a large energy waste. In order to improve this phenomenon, nano-scale antimony doped tin oxide ATO...
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In summer, the sun is strong, and the sunlight enters the room through the glass, causing the temperature in the car to rise sharply, which seriously affects the comfort of living and vehicle riding. Among them, the energy in the infrared band accounts for the largest proportion, and it is also the main source of energy for the temperature increase in the place where the sunlight is irradiated. By...
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Infrared light has an obvious thermal effect, which can easily lead to an increase in ambient temperature. Ordinary architectural glass has no thermal insulation effect, and can only be achieved by means of filming. Therefore, architectural glass, car film, outdoor facilities and other surfaces need to use thermal insulation materials to achieve the effect of thermal insulation and energy saving. ...
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The promotion and application of energy-saving technologies has reached a consensus in the world, and many countries have successively issued policies. In building energy consumption, a large proportion is lost through glass doors and windows. Similarly, in the hot summer, the exposure of sunlight through the car glass is unbearable for drivers and passengers, which accelerates the aging of the ve...
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In the world of electronic materials there are two important material properties "electrical conductivity" and "thermal conductivity". Generally speaking, as long as the electrical conductivity of the material is good enough, the thermal conductivity is also good. For example, copper, silver, aluminum and other metal materials have good electrical and thermal conductivity. Therefore, most metal ma...
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Boron carbide, also known as black diamond, is an inorganic substance with a chemical formula of B4C, usually a gray-black micropowder. It is one of the three hardest known materials (after diamond and cubic boron nitride) and is used in tank armor, body armor and many industrial applications. Several preparation methods of nano-boron carbide (supply 100-200nm): 1. Carbothermal reduction method Be...
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Nano WO3 has a large specific surface area and a significant surface effect, and is a good catalyst, which can be used as both a main catalyst and a co-catalyst, and has a high selectivity for the reaction. WO3 has a strong ability to absorb electromagnetic waves, and can be used as an excellent solar energy absorbing material and a recessive material. WO3 is an n-type semiconductor material with ...
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