Shandong Jiurunfa Chemical Technology Co., Ltd.
Shandong Jiurunfa Chemical Technology Co., Ltd.
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Various sizes available, such as 20nm, 50nm, 100nm,1μm, etc.Zinc Oxide
Effects of zinc oxide
Nano zinc oxide (ZnO) has a variety of uses and effects, mainly including the following aspects:
1.Antibacterial and anti-inflammatory: Nano zinc oxide has antibacterial and anti-inflammatory effects, can inhibit the growth and reproduction of certain bacteria, and has an auxiliary therapeutic effect on skin infections. In addition, its anti-inflammatory effect reduces the inflammatory response of tissues by inhibiting the production and release of inflammatory mediators.
2. Anti-ultraviolet: Nano zinc oxide can absorb and scatter ultraviolet rays, play a sunscreen role, and protect the skin from ultraviolet damage. Its excellent ultraviolet shielding ability makes it widely used in sunscreen cosmetics and anti-ultraviolet materials.
3. Catalytic effect: Nano zinc oxide has extremely high chemical activity and excellent catalytic properties, and can be used to catalyze the photolysis of organic molecules, such as the catalytic photolysis of phenol and the catalyst for the direct synthesis of methanol by CO hydrogenation. Its high surface activity can improve the selectivity and catalytic efficiency of the catalyst.
4. Photocatalysis: Nano zinc oxide is a semiconductor material in photochemistry, has photocatalytic activity, and can be used to manufacture photocatalytic materials and photolyze organic matter.
Zinc Oxide Parameters
| Parameter Name | Unit | Value Range/Description |
| Chemical Formula | - | ZnO |
| Molecular Weight | g/mol | 81.39 |
| Appearance | - | White powder or hexagonal crystals |
| Density | g/cm³ | Approximately 5.60-5.67 (varies with preparation method and purity) |
| Melting Point | °C | 1975 |
| Boiling Point | °C | 2360 (sublimes) |
| Refractive Index | - | Approximately 2.008-2.029 (varies with wavelength) |
| Band Gap | eV | Approximately 3.37 (at room temperature) |
| Purity | % | 99.0%-99.99% (depending on application requirements) |
| Particle Size Distribution | nm | Various sizes available, such as 20nm, 50nm, 100nm, 1μm, etc. |
| Specific Surface Area | m²/g | Typically in the range of 10-150m²/g, depending on particle size |
| Hygroscopicity | - | Low hygroscopicity, but may absorb moisture over time if exposed to humid conditions |
| Solubility | - | Insoluble in water, slightly soluble in alcohols, soluble in dilute acids, sodium hydroxide solutions, and ammonium chloride solutions |
| Thermal Stability | - | Stable at high temperatures, but prolonged exposure to high temperatures may cause discoloration or phase transformation |
| Electrical Conductivity | S/m | As a semiconductor, electrical conductivity varies with doping and temperature |
| UV Absorption | - | Effectively absorbs UVA and UVB ultraviolet radiation, providing good sunscreen properties |
| Antibacterial Properties | - | Inhibits the growth of various bacteria and fungi, suitable for antibacterial materials |
Application of zinc oxide:
1. Rubber tire industry, promotes the vulcanization, activation, reinforcement and anti-aging of rubber, can strengthen the vulcanization process, and improve the crack resistance and wear resistance of rubber products.
2. Rubber products, mainly used as a reinforcing agent for rubber to make rubber have good corrosion resistance, tear resistance, elasticity and elongation.
3. Glass, adding zinc oxide to glass can increase transparency, brightness and tensile stress resistance, and reduce thermal expansion coefficient.
4. Paint, used in paint with coloring, anti-corrosion and strong covering properties, improve the mildew resistance and anti-ultraviolet aging properties of paint.
5. Electronics, used to manufacture magnetic materials-ferrites for electronic structural components.
6. Phosphate solution, used for phosphating treatment, in phosphate solution, the performance is stable, after dissolution, it is clear and transparent, so that the phosphate solution can better play the role of anti-corrosion, anti-aging and metal protection on the metal surface.
7. Ceramics, used for paint, ink, varnished cloth coloring, printing resist for printing and dyeing industry.
8. Preferred material for preparing desulfurizers and chemical catalysts.
9. Used in zinc reactions and production of chemical industrial raw materials, such as zinc phosphate, zinc acetate, zinc borate, etc.
10. Chemical fiber textile field: used in viscose fibers, synthetic fiber products, anti-ultraviolet fabrics, antibacterial fabrics, parasols.
11. Used as astringent, used to make ointments and adhesive plasters
12. Sunscreen cosmetics series products
Zinc oxide production method:
The process flow of zinc oxide production can be divided into three types: indirect zinc oxide, direct zinc oxide, and wet zinc oxide.
The direct method uses zinc ore, zinc ash, and zinc concentrate as raw materials, and then adds coal to reduce them to zinc vapor after high-temperature oxidation roasting. The zinc vapor is oxidized with hot air to obtain zinc oxide. The purity of the product of this process is low, generally between 75% and 95%, and the impurity content is high. The zinc oxide produced by the direct method is usually needle-shaped or rod-shaped crystals with coarse particles. In addition to the process and raw material quality adopted, the product quality is also related to the quality of the reducing coal, because the volatile zinc vapor is directly contaminated by the combustion products of the reducing coal.
Use the waste ash to remove impurities through the impurity removal equipment to obtain qualified zinc ash, and then add the qualified zinc ash to the coal and lime according to the technical requirements, mix and crush, and use the coal briquette machine to press the crushed materials into balls. The pressed zinc-containing coal balls are stacked and dried; the dried coal balls are smelted in a zinc oxide furnace, and the zinc oxide products are obtained after reduction, oxidation, cooling and collection.
Baked sand: The raw materials are roasted at high temperature, the purpose of which is to remove the impurities of lead, pickaxe, arsenic, sulfur and mercury to the maximum extent, and obtain high-quality baked sand, and the material acid is purified after the roasting smoke.
Agglomerate ore: Agglomerate ore enters the cooling and powder collection system after reduction in the zinc oxygen furnace to obtain zinc oxide to be processed, or is directly packaged into zinc oxide finished products.
Indirect method: The raw material of zinc oxide is the metal zinc ingot or zinc slag obtained through smelting. : The zinc ingot or galvanized slag obtained by electrolysis is placed in a high-temperature crucible, heated to 600~700℃ and melted, and then evaporated at a temperature above 1000℃ to form zinc vapor. The vapor is oxidized by oxygen in the air to produce zinc oxide. This oxidation process will emit a shining light accompanied by a decrease in temperature. Then the zinc oxide particles are collected in a dust collection chamber through a cooling conveying pipe for cyclone separation, and the fine particles are captured with a bag to obtain the finished zinc oxide. The purity of the zinc oxide product produced by the indirect method is 99.5%-99.7%. Indirect zinc oxide can be used for rubber, varistors, paints, phosphating solutions, films, thermal conductive materials, catalysts, livestock feed, medicines, medical care and other industrial materials.
Wet process: Although the purity and whiteness of zinc oxide produced by pyrometallurgy are very high, the particles are coarse and the specific surface area is small. In order to meet the market demand for zinc oxide with large specific surface area (active oxidizing property), a wet process for zinc oxide production has been developed. The wet process for producing zinc oxide uses zinc-containing materials as raw materials. First, a zinc-containing solution is prepared. Then, a zinc compound (such as zinc carbonate) that is easily converted into zinc oxide is precipitated from the purified zinc-containing solution. The zinc compound precipitate is calcined to obtain zinc oxide. The wet process can produce active zinc oxide with fine particle size and large specific surface area.
Zinc oxide storage method:
1. Storage temperature and humidity
The storage temperature of zinc oxide should be kept at room temperature to avoid exposure to too high or too low temperature. At the same time, the humidity of the storage environment also needs to be controlled within a certain range to avoid condensation or discoloration on the surface of zinc oxide due to excessive humidity. Generally speaking, the most suitable storage humidity is 40%~50%.
2. Avoid contact with air and moisture
Zinc oxide will react with air and moisture at room temperature, resulting in a decrease in its quality and purity. Therefore, during storage, it is necessary to avoid zinc oxide from being exposed to too much air and moisture, and it can be stored in a sealed packaging bag or sealed container.
3. Selection of packaging materials
When choosing packaging materials for storing zinc oxide, it is necessary to give priority to materials that can effectively isolate air and moisture, such as aluminum foil bags, polyethylene bags, etc. At the same time, the packaging materials should have certain moisture-proof, shock-proof and anti-static properties to protect the quality and purity of zinc oxide.
4. Selection of storage environment
In addition to factors such as temperature, humidity and packaging materials, the choice of storage environment is also very important. Generally speaking, avoid storing zinc oxide in an environment that is exposed to direct sunlight and humidity. It is best to choose a ventilated, dry, and light-proof storage environment.
5. Storage period and regular inspection
The storage period of zinc oxide is generally about one year, and expired zinc oxide should not be used. In addition, the quality and purity of zinc oxide need to be checked regularly during storage, and quality problems should be dealt with in a timely manner.