Fine alumina powder is essential for electronic ceramics, electronic glass, lithium battery separators, high-voltage devices, and wafer polishing materials. It features insulation, high-temperature resistance, high thermal conductivity, and chemical stability. Its applications cover integrated circuits, consumer electronics, power engineering, communications, new energy vehicles, displays, and photovoltaics.
Major Applications of Fine Alumina Powder
Fine alumina powder comes from industrial alumina. It undergoes purification, calcination, grinding, homogenization, and classification. These processes control crystal shape, phase transformation, particle size, distribution, elemental sensitivity, surface properties, and activity. This ensures it meets different material requirements.
1. Electronic Ceramics
Fine alumina is used in ceramic substrates, ceramic packaging, vacuum tube shells, HTCC ceramics, and high-temperature wear-resistant ceramics. It supports tape casting, dry pressing, isostatic pressing, film rolling, hot pressing, and slurry casting. It is the main material in most electronic ceramic formulations. Its quality directly affects ceramic device reliability.
Ceramic package shell （Source Youke Huaci)
2. Electronic and Photovoltaic
Glass Fine alumina is a key material in electronic and photovoltaic glass production. Cover glass and substrate glass use the overflow method for shaping. Alumina powder is a major component of molten glass, second only to quartz powder. It improves toughness, light transmission, and chemical stability while reducing the expansion coefficient.
3. High-Voltage Electrical Devices
High-voltage and ultra-high-voltage devices are crucial for power transmission equipment. Alumina’s insulation and heat resistance make it suitable for insulation materials in high-voltage electrical systems. It enhances both thermal conduction and electrical insulation.
4. Lithium Battery Separators
Fine alumina is a key coating material for lithium battery separators. Polyethylene and polypropylene separators have low melting points and poor thermal stability. They shrink or break at high temperatures, causing short circuits. Alumina coating improves thermal stability and prevents shrinkage, enhancing battery safety and lifespan. It is widely used in new energy and consumer lithium batteries.
5. Grinding and Polishing
Alumina powder is an important abrasive for semiconductor wafer polishing. It is widely used as a grinding medium for single-crystal silicon wafer processing.
6. High-Thermal-Conductivity Materials
Spherical alumina is a top-tier thermal interface material. It is used in telecommunications, new energy vehicles, integrated circuits, and defense. It enhances thermal silicone fillers, thermal resin fillers, electronic packaging, and LED plastics. It improves insulation and heat dissipation, increasing efficiency and lifespan of electronics.
Refractory Materials
Alumina powder is widely used in shaped and unshaped refractory materials. It is especially valuable in steel ladle breathable bricks, extending their service life.
Conclusion
Epic Powder provides advanced grinding and classification solutions for fine alumina powder processing. Our equipment ensures precise particle size control and high efficiency, meeting diverse industrial needs. With European core technology and decades of expertise, we help customers achieve higher product quality and production efficiency.
