Indirect zinc oxide. The zinc oxide product produced by Luoyang Danke Zinc Industry is an oxide of zinc. It is insoluble in water, but soluble in acids and strong bases. It is a commonly used chemical additive, widely used in the production of plastics, silicate products, synthetic rubber, lubricating oil, paint and coating, ointment, adhesive, food, battery, flame retardant and other products.
It is understood that zinc oxide production can mainly be used as paint, white pigment in paint; It is also used as catalyst in chemical production; It can also be made into medical ointment, adhesive tape, dental filler, etc; It is a white amphoteric oxide insoluble in water, commonly known as zinc white.
Appearance and characteristics: white powder or hexagonal crystallinity. No odor, no dead star. It turns yellow after being heated, white again after cooling, and sublimates when it is heated to 1800. The covering power is half that of titanium dioxide and zinc sulfide. The coloring power is twice that of alkaline lead carbonate.
Nanometer zinc oxide is a new type of functional micro inorganic chemical material. Nanometer zinc oxide is more expensive than conventional zinc oxide. It has the characteristics of cheap and easy to get raw materials, high melting point, good thermal stability, good electromechanical coupling, good luminous performance, excellent catalytic performance and UV shielding performance, and has a wide range of uses. So let's learn about the advantages of adding nano zinc oxide to feed!
Nanotechnology and nano materials have been applied to all aspects of life. For example, nano titanium dioxide can be used in sunscreen cosmetics, nano zinc oxide can be used in surface coating products of space shuttles, and nano materials such as ceramics and rubber industry have been studied in industry. At present, the research of nano carriers and nano drugs has attracted the attention of researchers, and nano materials are gradually used in the medical field. Nanometer zinc oxide is a new high-performance micro inorganic material facing the 21st century. Its particle size is about 1~100nm, so let's talk about the action mechanism of nano zinc oxide in sterilization!
Nanometer zinc oxide is a semiconductor catalyst with electronic structure. Under the irradiation of light, when photons with certain energy or photons with energy Eg exceeding the semiconductor band gap are injected into the semiconductor, electrons are excited from the valence band VB to the conduction band CB, leaving holes. The excited conduction band electrons and valence band holes can recombine to eliminate the input energy and heat. The electrons are captured in the surface state of the material, and the valence band electrons jump to the conduction band. The valence band holes seize the hydroxyl electrons in the surrounding environment, turning the hydroxyl into free radicals, which can be used as a strong oxidant to degrade organic matter (or chlorine), killing bacteria and viruses.
Nanometer zinc oxide has large specific surface area, large surface energy and is easy to agglomerate. On the other hand, the surface polarity of nano ZnO is strong, and it is difficult to form a uniform distribution in organic media, which greatly limits its nanotechnology effect. Therefore, the dispersion and surface modification of nano zinc oxide powder become an indispensable treatment method before nano materials are applied to the matrix.
Indirect zinc oxide, which was promoted by French scientist LeClaire in 1844, is also called French zinc oxide. Generally, zinc ingot is used as raw material, which is converted into zinc vapor in a graphite crucible at a high temperature of 1000 ° C, and then oxidized by the air blown in to produce zinc oxide, which is collected after the cooling pipe to obtain zinc oxide particles.
Indirect zinc oxide is a widely used product, which can be produced and prepared in chemical and metallurgical industries. The difference is that chemical plants use commercial zinc as the main raw material to produce zinc oxide. In the actual production process, most enterprises produce zinc oxide by indirect method. With the continuous updating, development and improvement of zinc oxide production technology, the application of zinc oxide is more and more extensive, the output is increasing, and the production technology is constantly updated and upgraded. The indirect zinc oxide industry has broad prospects.
The preparation technology and application research of zinc oxide have been highly valued by most scientific and technological workers, and many related research work has been carried out, and great achievements have been made. As long as the zinc oxide industry can seize the opportunity, actively forge ahead, blaze new trails, and rely on science and technology to improve the industry level, it can be predicted that the preparation method of zinc oxide will continue to improve under the impetus of the industry development, and the research will enter a comprehensive development stage.
As we all know, zinc oxide is very easy to produce chemical changes with oxygen in the air, resulting in secondary oxidation, so it is necessary to do a good job in sealing during storage. Although the method of sealing is adopted in production and transportation, it is very important to do a good job in sealing the warehouse if the customer has stored a certain amount of zinc oxide. The airtightness of zinc oxide tank shall be maintained regularly.
The production method of nano zinc oxide (VK-J50) is different from that of ordinary zinc oxide. General production methods of zinc oxide include indirect method, direct method and electrothermal method. For example, the common indirect zinc oxide is made from electrolytic zinc ingot after melting, and zinc vapor is made into Zn+02 through air oxidation surface under high temperature, while nano zinc oxide is reflected by magnesium chloride and alkali under ultra-high pressure and high temperature, and is filtered by organic chemical activated carbon to produce nano zinc oxide.
Nanometer zinc oxide is used as filler, additive and brightener of coatings. In addition to the above properties, the excellent sun protection and isolation ability of nano zinc oxide also has significant characteristics in the aging resistance of building coatings.
High zinc has the function of promoting growth and preventing diarrhea, but when it is used, it will also cause a series of problems such as residual environmental pollution in livestock and poultry. However, compared with traditional zinc oxide products, this nano zinc oxide introduced today has large specific surface area and high chemical activity.
The white hexagonal crystal or spherical particles of nano zinc oxide are also found to have a particle size of less than 100nm, an average particle size of 50nm, and a specific surface area of more than 4 ㎡/g. Therefore, it will now have high chemical activity, excellent catalytic and photocatalytic activity, and have anti infrared, ultraviolet radiation and bactericidal functions. Good liquidity.