Aluminum Oxide Nanopowder Water Dispersion (Al2O3,Gamma, 20wt%, 10nm)

Aluminum Oxide Nanopowder Water Dispersion (Al₂O₃, Gamma, 20 wt%, 10 nm) is a suspension of gamma-phase aluminum oxide nanoparticles in water. Here’s a detailed explanation of its composition, properties, and applications:

1. Composition:

• Aluminum Oxide (Al₂O₃):
  • A widely used ceramic material with excellent thermal and mechanical properties.
• Gamma Phase:
  • The gamma phase (γ) of Al₂O₃ is a metastable phase known for its:
    • High surface area.
    • Porosity, making it suitable for applications like catalysis and adsorption.
  • Compared to the stable alpha phase, gamma Al₂O₃ is less dense but chemically active.
• Nanoparticles (10 nm):
  • Ultra-fine particles with an average diameter of 10 nanometers (nm).
  • High surface area due to the nano size, enhancing reactivity and performance.
• 20 wt%:
  • 20% by weight of the dispersion consists of Al₂O₃ nanoparticles, while the remaining 80% is water.
• Water Dispersion:
  • The particles are uniformly dispersed in water, ready for application.

2. Key Properties:

• Nano Scale:
  • Particles with 10 nm diameter provide a very high surface area, making them ideal for surface-dependent applications.
• Gamma Phase Characteristics:
  • High reactivity.
  • Excellent adsorptive and catalytic properties.
• Water-Based Dispersion:
  • Environmentally friendly and safe to handle compared to organic solvent dispersions.
• Thermal Stability:
  • Gamma-phase Al₂O₃ is stable at moderate temperatures but transitions to the alpha phase at higher temperatures (~900–1100°C).
• High Surface Energy:
  • Suitable for surface modification, coatings, or integration into composite materials.

3. Applications:

• Catalysis:
  • Acts as a catalyst or catalyst support in chemical reactions, such as hydrocracking, reforming, and pollutant removal.
• Adsorption:
  • Used for water purification, gas separation, and dehumidification due to its high surface area and porosity.
• Coatings:
  • Forms protective or functional coatings with excellent adhesion and thermal resistance.
• Polishing:
  • As an abrasive in ultra-fine polishing processes for semiconductors, optics, and metals.
• Composites:
  • Enhances mechanical strength, thermal stability, and wear resistance in polymer, ceramic, or metal composites.
• Electronics:
  • As a dielectric material or thermal insulator in electronic devices.
• Thermal Management:
  • Used in heat-resistant coatings or thermal interface materials.

4. Advantages:

• High Surface Area:
  • Enhanced performance in catalytic and adsorption applications.
• Easy to Use:
  • Pre-dispersed in water for uniform application, eliminating the need for manual mixing.
• Environmentally Friendly:
  • Water-based formulation avoids hazardous organic solvents.
• Chemical Reactivity:
  • The gamma phase’s higher reactivity compared to the alpha phase is ideal for dynamic environments.

5. Handling and Storage:

• Handling:
  • Shake or stir thoroughly before use to ensure uniform nanoparticle distribution.
  • Avoid prolonged exposure to air, which may cause sedimentation or contamination.
• Storage:
  • Store in a cool, dry place, avoiding freezing or excessive heat to maintain dispersion stability.
• Safety:
  • Use gloves and protective equipment to avoid contact with skin or eyes.