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Zinc Oxide (ZnO), also known as zinc oxide powder, zinc white, or zinc oxide white, is an inorganic compound with the chemical formula ZnO and a molecular weight of 81.39g/mol. It exists as a white solid powder, odorless and tasteless, difficult to dissolve in water and ethanol but soluble in acids, aqueous sodium hydroxide solutions, ammonium chloride, etc. ZnO possesses high chemical and thermal stability, with a melting point of approximately 1975°C and a boiling point as high as 2360°C. Its crystalline structure, most commonly in the wurtzite hexagonal form, endows ZnO with excellent electrical, optical, and piezoelectric properties.
Parameter Name | Value |
---|---|
Chemical Formula | ZnO |
Molecular Weight | 81.39g/mol |
Appearance | White Solid |
Melting Point | 1975°C |
Boiling Point | 2360°C |
Density | 5.606g/cm³ |
Water Solubility | Insoluble in Water |
Refractive Index | 2.008~2.029n²⁰/D |
CAS Registry Number | 1314-13-2 |
EINECS Registry Number | 215-222-5 |
The production process of zinc oxide mainly includes a batching system, feeding system, rotary kiln system, slag water quenching system, oxidation cooling system, dust collection and bagging system, and flue gas desulfurization system. The rotary kiln system is the core equipment, where ZnO is obtained through high-temperature oxidative roasting. Depending on raw materials and processes, production methods can be divided into direct, indirect, acid, and ammonia methods.
ZnO's large bandgap and exciton binding energy contribute to its excellent room-temperature luminescent properties. Meanwhile, its wurtzite hexagonal crystalline structure grants ZnO good electrical, optical, and piezoelectric properties. These theoretical foundations provide a scientific basis for ZnO's applications in multiple fields.
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ZnO products are typically packaged in woven bags or plastic drums, ensuring safety and stability during transportation and storage. Store in a dry, well-ventilated, dark place, avoiding contact with moisture, high temperatures, and flammable materials.
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