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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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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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Nano zinc oxide is a good vulcanization activator. Since nano-zinc oxide can be combined with rubber molecules at the molecular level, it can improve the performance of the rubber compound and improve the characteristics of the finished product. Take radial tires and other rubber products as examples. The use of nano-zinc oxide can significantly improve the thermal conductivity, wear resistance, t...
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The application in plastics utilizes the high strength, high fluidity and small size effect of silica, which can improve the compactness, smoothness and wear resistance of plastic products. Through appropriate surface modification, the purpose of strengthening and toughening plastics can be achieved at the same time. By adding fumed silica into polyethylene, through a special method, the silica ca...
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Due to the extremely strong surface activity of nano TiO2, it is easy to form large-sized agglomerates, which affects the practical application. Therefore, it can be modified from the aspects of improving the photocatalytic degradation efficiency of TiO2, changing the dielectric constant and surface activity of TiO2. There are two ways of combining surfactants with TiO2: one is physical adsorption...
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Nano zinc oxide is a fine inorganic material with a particle size between 1nm and 100nm. Zinc oxide usually exists in the form of wurtzite, with four oxygen atoms surrounding the zinc ion, forming a thermodynamically stable tetrahedral structure. Due to the changes in the crystal structure and surface electronic structure of nano-zinc oxide, nano-zinc oxide has the characteristics of surface effec...
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