High-purity nanoscale quasi-spherical alumina

High-purity nanoscale quasi-spherical alumina

This product is a proprietary 99.9-99 developed by our company. It is nano-spherical alumina with 99% purity and particle sizes under 1 micron. The product appears as a white, fluffy powder with excellent dispersibility and anti-settling properties. It features controllable α-phase content, high purity, small particle size, and high specific surface area. Additionally, it exhibits superior thermal conductivity, good flowability, and high cost-effectiveness.

2、Key performance indicators of nano-alumina QL-YA series:

3、Key features of high-purity 99.99% nano-spherical alumina:

l Nanometer particle size with strict particle size control, small agglomerated particles, concentrated particle size distribution, and good dispersibility;

l Al2O3 purity is up to 99.99%, impurity content is very low, thermal conductivity is high, thermal resistance is low;

l α phase, stable crystal form, high transmutation rate of more than 95%, high hardness, good and uniform morphology;

l Large specific surface area, good adsorption performance, corrosion resistance, high insulation;

l It has high melting point, good thermal stability, low thermal expansion coefficient, high mechanical strength and good thermal conductivity.

l The wear resistance is as good as the corundum, the hardness is the same as the corundum, the wear resistance is as good as the superhard alloy;

l The sintering performance is stable, the high temperature shrinkage is moderate, the sintering performance is good, the conversion rate is high, and the sodium content is low.

l The particle size distribution is uniform, the fluidity is good, the hardness is high, the mechanical strength is high, the corrosion resistance is good, and the scratch is not easy to produce;

l The grain size distribution is narrow, the surface quality of the material is good after grinding, and the material can be polished with a bright luster.

4. Industry Analysis of QL-YA Series High-Purity Nanoscale Spheroidal Alumina Applications:

Nanometer alumina not only retains the excellent properties of conventional alumina—such as high hardness, strength, corrosion resistance, wear resistance, high-temperature tolerance, superior insulation, and strong oxidation resistance—but also demonstrates superior physicochemical characteristics due to its pronounced volume effect, quantum size effect, surface effect, and macroscopic quantum tunneling effect. Additionally, its excellent compatibility with rubber and plastics makes it a vital functional and structural material in fields like aerospace, defense, chemical engineering, and microelectronics, where it has become indispensable in modern society.

l Application on Ceramic Material

In the application of ceramics, the precision ceramics made of nano alumina powder have the plasticity and toughness similar to metal, light weight, especially the strength is greatly improved. Adding a small amount of micron or nano alumina to the conventional ceramic matrix can multiply the mechanical properties of the material, improve the toughness of ceramics and reduce the sintering temperature.

l Application of Powder Coating

It reduces electrostatic charge generation, enhances powder flowability, improves processability in extruders, prevents moisture absorption, extends storage stability, and increases rheological properties and edge coverage on substrates. Nanometer aluminum oxide, which carries a positive charge, can be used for dry mixing before or after fine grinding in all powder coatings. Due to its positive charge, nano-alumina is highly suitable for electrostatic friction coating applications. In some cases, nano-alumina can impart friction-induced static electricity to products that cannot be electrified through friction. The mixing effect of nano-alumina reduces flow-obstructing static charges and facilitates powder deposition during application. The unique advantages of nano-alumina partly stem from its ultra-fine particle size and controlled distribution during manufacturing, as well as the surface charge of its particles.

l Application in Electronic Industry

Nanometer alumina, with its extensive surface area and interface, exhibits remarkable sensitivity to humidity variations while maintaining high stability, making it an ideal material for humidity-sensitive sensors and hygroelectric thermometers. Additionally, it demonstrates excellent electrical insulation, chemical durability, thermal resistance, strong radiation resistance, high dielectric constant, and a smooth, uniform surface. These properties enable its use as a semiconductor material and substrate for large-scale integrated circuits, with widespread applications in microelectronics, electronics, and information technology industries.

l Application of Material Surface Protection

Nanometer Al2O3 exhibits excellent chemical stability and strong adsorption capacity, demonstrating favorable compatibility with various substrates. Nanometer aluminum oxide-based coatings form durable, dense protective layers on metal and ceramic surfaces. These coatings effectively prevent welding and withstand high temperatures while maintaining easy removal without causing adverse effects on coated components.

At the same time, the advantages of alumina, such as high melting point, high hardness and good wear resistance, can also be used to improve the surface hardness, corrosion resistance and wear resistance, and can be used for surface protection of machinery, tools, chemical pipelines, etc.

Al2O3 nanocrystals have excellent resistance to atomic oxygen erosion. When used in organic coatings, they can significantly improve the oxidation resistance of the coatings. Moreover, they can transfer stress when the coatings are exposed to alternating thermal conditions, thereby reducing crack formation.

l Application of Adsorption Materials

Alumina materials are widely available, low-cost, and easy to process, making them suitable for mass production in formaldehyde removal. The alumina dispersion is coated onto a honeycomb ceramic substrate using a suspension particle coating method, and the resulting sintered ultrafiltration alumina film can be applied in wastewater treatment and other fields.

l Application in the Direction of New Energy

The modification of lithium manganese oxide by nano alumina is a common method for new energy materials. The results show that the capacity decay of the simulated battery is reduced to 0.06% per cycle.

l Application of Abrasive in Die Casting

The wear resistance of the phenolic resin material can be improved significantly by adding 5% nano Al2O3 powder as the nucleation agent.

l Application of Optical Materials

Nano-alumina exhibits excellent infrared extinction properties, making it suitable for nano-stealth coatings, infrared extinction agents, and infrared absorbing materials. It has been widely applied in military fields such as anti-infrared smoke screens and infrared camouflage. Additionally, nano-Al2O3 serves as an outstanding UV absorber. Incorporating nano-alumina powder into compact fluorescent lamps can reduce light decay and extend lamp lifespan.

l Application of Composite Material

The nano-alumina composite films were prepared by nano-alumina materials. The electrical properties, decomposition humidity and tensile strength of the composite films were optimized. The tensile strength and impact strength of the nano-alumina filled unsaturated polyester composite films were excellent.

l Application of Catalyst and Its Carrier

Alumina as a catalyst carrier, because of its high specific surface area, good hardness, wear resistance, chemical stability, can disperse some active material components on its surface, has been widely used in petroleum processing, catalytic cracking, isobutane oxidation dehydrogenation to produce isobutylene and butadiene, etc.

5. Main Applications of Nano-Alumina:

1. Alumina ceramic, C substrate, encapsulation materials, high-purity crucible, winding spool, bombardment target, furnace tube.

2. Integrated circuit substrates, single crystal materials, and far-infrared materials.

3. Additives for lithium battery cathode materials.

4. High-pressure sodium lamp tube and EP-ROM window.

5. Polishing materials, glass products, metal products, semiconductor materials, plastics, magnetic tapes, and grinding belts.

6. Wear-resistant coatings, ceramic film coatings, plasma spraying.

7. Rubber, plastic wear-resistant reinforcing materials, and high-grade water-resistant materials.

8. Gas phase deposition materials, fluorescent materials, special glasses, composite materials and resin materials.

9. High-efficiency catalysts, catalyst supports, automotive exhaust purification materials, and analytical reagents.

10. Single crystal, ruby, sapphire, white gemstone, yttrium aluminum garnet.

11. Thermal Conductive Filler.

12. Inorganic membrane materials.

13. Cosmetic fillers.