Product Description

Characteristics

• High Purity: ZnO content 99.5%–99.7% by indirect / French process.
• Fine & Uniform Particles: Good dispersion and consistent reaction speed.
• Low Impurities: Strict control of Pb, Cd, As, Fe and other heavy metals.
• Chemical Stability: Stable under normal temperature and pressure; insoluble in water and alcohol.
• Excellent UV Protection: Effective absorption and reflection of UV-A and UV-B. 
• Antibacterial & Deodorizing: Natural antibacterial, antifungal, and deodorizing properties.
• Good Thermal Conductivity: Suitable for thick rubber parts requiring heat dissipation.
• Multiple Grades: Rubber, coating, ceramic, cosmetic, personal care raw material, feed, electronic, and activated grades.

Advantages

• High Purity & Low Impurities: Improves product stability and reduces side effects in final products.
• Excellent Vulcanization Activity: Acts as a vulcanization activator in rubber, increasing crosslink density and making vulcanization more complete. 
• Improves Rubber Adhesion: Enhances adhesion between rubber and steel wire, cord fabric, and other reinforcing materials.
• Good Dynamic Mechanical Properties: Low deformation, low heat build-up, good wear resistance, and excellent aging resistance.
• Wide Application Range: Meets or exceeds GB/T 3185-2016 and is widely used in rubber, ceramics, glass, personal care raw materials, electronics, feed, and chemical intermediates.
• Activated Grade Available: High specific surface area (~100 m²/g) for higher activation efficiency and reduced dosage.
• Surface Treatment Available: Silicone or silane treatment can be provided to improve dispersion in organic or aqueous systems.
• Stable Supply & Fast Delivery: Regular production capacity and multiple loading ports ensure reliable delivery.

Applications

• Rubber Industry (50–60%): Vulcanization activator for tires; improves wear resistance, heat conduction, aging resistance, and adhesion to steel wire/cord fabric; boosts strength and gloss in latex products.
• Coatings & Paints: White pigment for hiding power and tinting strength; provides UV/IR shielding, anti-mildew, durability, and weather resistance.
• Ceramics & Glass: Glaze flux for better elasticity and gloss; nano ZnO lowers sintering temperature by 40–60°C and gives antibacterial function; used in optical and special glass.
• Cosmetics & Personal Care: Broad-spectrum UV-A/UV-B mineral sunscreen; used in skincare, diaper rash creams, and acne products; suitable for sensitive skin.
• Personal Care & Skin Raw Materials: Skin protective ingredient for ointment & external skincare formulations; high purity cosmetic & skin care grade available.
• Feed & Animal Nutrition: Zinc trace mineral additive supporting animal health and growth.
• Electronics & Others: Used in ferrite, varistors, phosphors, electronic components, and as a chemical intermediate for zinc compounds.

Technology

• Indirect / French Process: Zinc metal is vaporized at about 1000°C and oxidized with hot air to produce high-purity ZnO (99.5%–99.7%).
• Direct / American Process: Zinc ore is reduced and vaporized at 1000–1200°C, then oxidized and cooled to collect ZnO.
• Wet Process: Zinc salt solution reacts with alkali to form basic zinc carbonate or zinc hydroxide, followed by filtration, drying, and calcination to produce activated zinc oxide.
• Nano Technology: Controlled synthesis produces nano ZnO (30–200 nm) with high surface area and high activity.
• Surface Treatment: Silicone or silane coating improves dispersion and compatibility in organic or aqueous systems.
• Quality Control: ICP-AES for heavy metals, BET for surface area, and strict in-process inspection ensure batch-to-batch consistency.

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.