1. Precision polishing and grinding
Application scenario:
Semiconductor industry: used for chemical mechanical polishing (CMP) of silicon wafers and compound semiconductors (such as gallium arsenide and silicon carbide) to remove surface defects and achieve ultra smooth surfaces (roughness Ra<0.5nm).
Optical components: polished lenses, prisms, laser crystals, etc., reduce light scattering, improve transmittance and imaging quality.
Hard materials: Precision machining of hard and brittle materials such as sapphire, ceramics, quartz, etc. to meet high-precision requirements.
Advantage:
High uniformity of particle size to avoid scratching the surface.
Polishing rate and selectivity can be optimized by adjusting pH value and concentration.
2. Coatings and coating enhancements
Application scenario:
Wear resistant coating: added to epoxy resin, polyurethane and other coatings to enhance coating hardness, wear resistance and scratch resistance, suitable for the automotive and aviation fields.
Anti corrosion coating: As a filler, it enhances the density of the coating, blocks the penetration of corrosive media, and extends the life of the metal substrate.
Self cleaning coating: Utilizing the photocatalytic activity of nano alumina to decompose organic pollutants and achieve surface self-cleaning.
Advantage:
Nano scale dispersion improves coating uniformity.
Good chemical stability and compatibility with various substrates.
3. Lithium battery materials
Application scenario:
Positive electrode material coating: Covering the surface of lithium cobalt oxide, ternary materials, etc. with an aluminum oxide layer to suppress electrolyte decomposition, improve cycling stability and safety.
Solid state electrolyte: As an ion conductor or interface modification layer in solid-state batteries, it enhances ion conductivity and interface stability.
Advantage:
High purity alumina reduces the impact of impurities on battery performance.
The suspension form facilitates uniform coating.
4. Catalyst carrier
Application scenario:
Environmental catalysis: Loading precious metals (such as platinum and palladium) for automobile exhaust purification, VOCs decomposition, etc.
Chemical catalysis: As an acidic catalyst carrier, it promotes esterification, alkylation and other reactions.
Advantage:
High specific surface area provides more active sites.
Good thermal stability, suitable for high-temperature reaction environments.
5. Ceramics and refractory materials
Application scenario:
Advanced ceramics: Preparation of alumina ceramics, silicon nitride ceramics, etc. for electronic devices and biomedical implants.
Refractory materials: used as additives to improve the high-temperature strength and thermal shock resistance of materials, applied in metallurgy and glass industry.
Advantage:
The suspension form is convenient for molding processing (such as injection molding).
Uniform dispersion reduces defects and improves material performance.
6. Biomedical field
Application scenario:
Drug carrier: Load anti-cancer drugs or genes to achieve targeted and controlled release.
Biosensor: As an electrode modification material, it improves detection sensitivity and selectivity.
Organizational engineering: constructing three-dimensional scaffolds to support cell growth and differentiation.
Advantage:
Good biocompatibility and low toxicity.
Surface functionalization modifications (such as amino and carboxyl groups).
7. Electronics and Microelectronics
Application scenario:
Integrated circuit packaging: As a bottom filling material, it alleviates thermal stress and improves reliability.
Thermal interface material: filled between the chip and the heat sink to improve thermal conductivity efficiency.
Advantage:
High thermal conductivity (alumina itself has excellent thermal conductivity).
The suspension form is convenient for coating and curing.
8. Other special applications
Electroplating additives: improve the glossiness and uniformity of electroplated layers.
Fireproof material: As a foaming component of the expansion type fireproof coating, it improves the flame retardant performance.
3D printing: As a key component of ceramic slurry, it achieves high-precision ceramic component manufacturing.