Product Description

Characteristics

• High Purity: Produced by the indirect (French) process, with ZnO content of 99.5%–99.7%.
• Fine & Uniform Particle: Delivers superior dispersion and consistent reaction kinetics.
• Low Impurity Profile: Heavy metals including Pb, Cd, As and Fe are rigorously controlled.
• Excellent Chemical Stability: Remains stable at ambient temperature and pressure; insoluble in water and alcohols.
• Broad-Spectrum UV Shielding: Absorbs and reflects both UVA and UVB rays efficiently.
• Antibacterial & Deodorizing Performance: Possesses inherent antibacterial, antifungal and deodorizing capabilities.
• High Thermal Conductivity: Ideal for thick rubber components that demand heat dissipation.
• Wide Range of Grades: Rubber, coating, ceramic, cosmetic, personal care, feed, electronic and activated zinc oxide grades available.

Advantages

• High Purity & Low Impurities: Boosts end-product stability and minimizes adverse impacts on finished goods.
• Superior Vulcanization Activity: Functions as a rubber vulcanization activator to raise crosslink density and achieve thorough vulcanization.
• Enhanced Rubber Adhesion: Strengthens bonding between rubber and reinforcing substrates such as steel wire and cord fabric.
• Outstanding Dynamic Mechanical Performance: Features low deformation, low heat build-up, great wear resistance and exceptional anti-aging properties.
• Broad Application Scope: Complies with or surpasses GB/T 3185-2016. Widely applied in rubber, ceramics, glass, personal care materials, electronics, animal feed and chemical intermediates.
• Activated Grade Option: High specific surface area (~100 m²/g) delivers higher activation efficiency and lowers required dosage.
• Custom Surface Treatment: Silicone or silane surface modification is available to improve dispersion in organic and aqueous matrices.
• Stable Supply & Prompt Delivery: Consistent production capacity together with multiple loading ports guarantees dependable shipment.

Applications

• Rubber Industry (50–60% of total consumption): Acts as a vulcanization activator in tire manufacturing. It enhances wear resistance, thermal conductivity and anti-aging performance, while improving adhesion between rubber and steel wire / cord fabric. It also increases mechanical strength and surface gloss for latex goods.
• Coatings & Paints: Functions as a white pigment with excellent hiding power and tinting strength. It delivers UV & IR shielding, anti-mildew properties, long-term durability and superior weather resistance.
• Ceramics & Glass: Serves as a glaze flux to elevate elasticity and gloss. Nano zinc oxide reduces sintering temperature by 40–60°C and imparts antibacterial features. It is widely adopted in optical glass and special glass products.
• Cosmetics & Personal Care: A broad-spectrum mineral sunscreen blocking both UVA and UVB. Applied in skincare, diaper rash ointments and anti-acne formulations, ideal for sensitive skin.
• Personal Care & Skin Raw Materials: A skin-protective raw material for ointments and topical skincare preparations. High-purity cosmetic-grade zinc oxide is available.
• Feed & Animal Nutrition: Trace zinc supplement to sustain animal health and promote growth.
• Electronics & Other Fields: Utilized in ferrites, varistors, phosphors and electronic components; also acts as a chemical intermediate for synthesizing zinc derivatives.

Technology

• Indirect / French Process: Metallic zinc is vaporized at approximately 1000°C and oxidized by hot air, yielding high-purity zinc oxide with a purity range of 99.5%–99.7%.
• Direct / American Process: Zinc ore undergoes reduction and vaporization at 1000–1200°C. The generated zinc vapor is then oxidized and cooled to recover ZnO powder.
• Wet Process: Zinc salt solution reacts with alkali to precipitate basic zinc carbonate or zinc hydroxide. Subsequent filtration, drying and calcination produce activated zinc oxide.
• Nano Technology: Controlled synthesis enables nano ZnO (30–200 nm) production, featuring large specific surface area and superior reactivity.
• Surface Treatment: Silicone or silane coating can be applied to enhance powder dispersion and compatibility within organic or aqueous matrices.
• Quality Control: Heavy metal testing via ICP-AES, specific surface area measurement by BET, together with rigorous in-line process inspections guarantee consistent quality across batches.

Theory

• Rubber Vulcanization Activation: ZnO reacts with stearic acid to form zinc stearate, which then reacts with accelerators to form active zinc-accelerator complexes, reducing activation energy and accelerating vulcanization.
• UV Protection: ZnO is a wide-bandgap semiconductor (approx. 3.37 eV) that absorbs UV radiation and converts it into a small amount of heat, while also reflecting and scattering UV rays.
• Photocatalytic Activity: Under light, nano-ZnO generates electron-hole pairs and reactive oxygen species (ROS), which can break down organic matter and affect microbial cells.
• Ceramic Fluxing: ZnO reacts with other glaze components to form low-melting eutectics, reducing sintering temperature and improving glaze gloss and elasticity.

Service

• Technical Support: Expert selection guidance and formulation optimization.

• Quality Assurance: ISO 9001 certified; products comply with GB/T 3185-2016 and international standards.

• Free Samples: Available for testing and formula validation; freight covered by the buyer.

• Customization: Tailored specifications, particle sizes, surface treatments, and packaging.

• Documentation: COA, MSDS, TDS, REACH, TSCA, and other regulatory documents provided.

• Logistics: Multiple loading ports and warehouses for fast delivery.

• After-Sales Service: Complaints addressed within 24 hours, with full technical follow-up.

Production Process

• Indirect / French Process
  Zinc ingot / zinc dross → crushing → smelting at approximately 1,000°C to generate zinc vapor → oxidation with hot air → cooling → collection of ZnO powder.
  Purity: 99.5%–99.7%.
  Main Applications: Rubber, cosmetics, personal care, and other high-end applications.
• Direct / American Process
  Zinc ore → purification to zinc ash → mixing with coal and lime → reduction in a furnace at 1,000–1,200°C → zinc vapor → oxidation and cooling → collection of ZnO.
  Purity: Generally below 99.7%.
  Main Applications: Industrial grade, ceramics, and coatings.
• Wet Process
  Zinc raw material + ammonia / sulfuric acid → zinc complex or zinc sulfate → purification → precipitation of basic zinc carbonate / zinc hydroxide → filtration, washing, drying, calcination → activated ZnO.
  Main Applications: Activated zinc oxide, rubber, feed, and agriculture.

Operation Method

• Rubber: Incorporate ZnO during mixing or milling, together with stearic acid and accelerators. Typical dosage: 3–5 phr; activated ZnO may allow for a reduced dosage.
• Coatings / Inks: Gradually add ZnO powder to the base material under stirring. Use dispersing agents if needed. Typical dosage: 5–15% by weight.
• Cosmetics: Disperse ZnO in the oil or water phase before adding it to the formulation. For nano-ZnO, prepare a pre-dispersion slurry first.
• Typical dosage: 2–20%, depending on SPF and product type.
• Ceramics: Mix and grind with other glaze components. Typical dosage: 2–10% in glaze formulations.
• Feed: Add through a trace mineral premix in accordance with local nutritional standards.
• General Handling: Minimize dust generation and keep the work area well ventilated. Wash hands thoroughly after use.