Specific Surface Area Typically In The Range Of 10-150m²/g,
Depending On Particle Size Zinc Oxide
Zinc Oxide Introduction
Zinc oxide is an inorganic substance with the chemical formula ZnO,
which is an oxide of zinc. It is insoluble in water but soluble in
acid and strong alkali. Zinc oxide is a commonly used chemical
additive with many unique properties and applications. It is widely
used in the production of plastics, silicate products, synthetic
rubber, lubricants, paints, ointments, adhesives, foods, batteries,
flame retardants and other products.
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 |
Main uses and functions
Zinc oxide has a large energy band gap and exciton binding energy,
high transparency, and excellent room temperature luminescence
performance. It is used in liquid crystal displays, thin film
transistors, light-emitting diodes and other products in the
semiconductor field. In addition, microparticles of zinc oxide as a
nanomaterial have also begun to play a role in related fields.
1. Zinc oxide has high chemical stability and can remain stable in
harsh environments such as high temperature, high pressure, strong
acid, and strong alkali. This stability makes zinc oxide widely
used in many industrial fields. For example, in ceramics, glass,
coatings and other industries, zinc oxide can be used as an
additive to improve the quality and performance of products.
2. Zinc oxide has good electrical conductivity and can be widely
used in electronics, communications, electricity and other fields.
In the electronics field, zinc oxide can be used as a semiconductor
material to manufacture electronic components such as integrated
circuits and transistors.
3. Zinc oxide has unique physical properties, such as high
refractive index, low dielectric constant, and high transmittance.
These properties make zinc oxide widely used in the optical field,
such as optical devices, fiber optic communications, lasers, etc.
In addition, zinc oxide can also be used to manufacture devices
such as pyrometers and varistors, which has high practical value.
4. Zinc oxide is a non-toxic substance that does not harm the human
body and the environment. This environmental friendliness makes
zinc oxide widely used in many fields, such as cosmetics, food, and
medical treatment. In addition, zinc oxide can also be used to
manufacture environmentally friendly coatings, plastics and other
materials, which has high environmental value.
Chemical properties
Chemical stability: Zinc oxide has high chemical stability and can
remain stable in harsh environments such as high temperature, high
pressure, strong acid, and strong alkali. This stability makes zinc
oxide widely used in many industrial fields.
Amphoteric oxide properties: Zinc oxide is an amphoteric oxide that
can react with both acid and alkali.
Catalytic effect: Zinc oxide has a certain catalytic activity and
can be used as a catalyst to participate in various chemical
reactions and accelerate the reaction process.
Advantages
1. Superior Quality: Produced with advanced direct-method technology, ensuring
consistent quality and purity.
2. Versatility: Suitable for multiple industries such as rubber, ceramics, and
cosmetics.
3. Environmentally Safe: Low heavy metal content and safe for a wide range of
applications.
4. Excellent Performance: Provides enhanced reinforcement, thermal stability, and UV
protection.
Applications
1. Rubber Industry: Used as a reinforcing agent, activator, and vulcanization
accelerator.
2. Ceramics: Improves whiteness, strength, and thermal stability.
3. Paints & Coatings: Acts as a pigment and anti-corrosion agent.
4. Cosmetics: Used in sunscreens and skincare products as a UV absorber.
5. Pharmaceuticals: Functions as an antiseptic and astringent in ointments.
6. Agriculture: Serves as a micronutrient in fertilizers and animal feed
additives.
Production Technology
The direct method, also known as the French process, involves the
following steps:
1. Raw Material Selection: High-purity zinc materials such as zinc ore or zinc scrap are
used.
2. Smelting: Zinc is heated and vaporized.
3. Oxidation: Zinc vapor reacts with oxygen in a controlled environment to
produce fine zinc oxide powder.
4. Collection and Processing: The resulting ZnO is collected, filtered, and classified to
ensure quality and uniformity.
Theory
The production of Zinc Oxide via the direct method is based on the
principle of oxidation of metallic zinc in the presence of oxygen.
The chemical reaction is:
2Zn + O₂ → 2ZnO
This process ensures the formation of high-purity zinc oxide with
uniform particle size.
Service
1. Technical Support: Provide guidance on product application and usage.
2. Customization: Tailor specifications based on customer requirements.
3. Sample Availability: Free samples for testing and evaluation.
4. Logistics: Efficient shipping and delivery services.
Packaging & Storage
1. Packaging: Packed in 25 kg bags or 1 MT jumbo bags. Custom packaging is
available upon request.
2. Storage: Store in a dry, cool, and ventilated place. Avoid exposure to
moisture and direct sunlight.
Precautions
1. Avoid inhalation of zinc oxide powder; use proper protective
equipment.
2. Handle with care to prevent contamination or spillage.
3. Follow local regulations for disposal of waste materials.
4. Keep away from acidic substances to avoid chemical reactions.
