High-purity process inputs manufactured under strict ISO 9001 and verified via ICP-MS, laser diffraction, and full lot COA documentation.
Ultrafine atomized aluminum powders categorized at a Median Volume Diameter (D50) of 1.50 ± 0.15 µm occupy an essential niche between conventional micronized metal granules and sub-micron pyrophoric materials. Sourcing from Chinese specialized atomization units requires rigorous examination of active aluminum retention, passivating oxide skin stoichiometry, and dynamic rheology.
Produced primarily via closed-circuit inert nitrogen or argon gas atomization, our 1.5 µm grade exhibits an aspect ratio approaching 1.05 to 1.12. High sphericity directly governs viscosity reduction in conductive paste formulations and optimizes particle packing fraction during cold isostatic compaction.
Ultrafine aluminum possesses an immense specific surface area (SSA 4.8 – 6.2 m²/g). Controlled micro-oxygen gas stabilization creates an amorphous Al₂O₃ dielectric passivation shell strictly maintained between 2.8 and 4.2 nanometers, balancing active metal fuel potential with non-pyrophoric handling stability.
Precision air classification ensures the complete elimination of oversize aggregates and coarse spatter particles that cause clogging in screen printing and defects in thin-film dielectric barriers. Every batch is validated on Malvern Mastersizer 3000 instruments via wet laser dispersion.
| Analytical Parameter | High-Purity Electronic Grade (99.8%) | Propellant & Pyrotechnic Grade (99.0%) | Metallurgical / Thermal Grade (98.0%) | Test Standard |
|---|---|---|---|---|
| Active Aluminum Content (%) | ≥ 98.7% | ≥ 98.2% | ≥ 97.5% | Acid Dissolution Hydrogen Volumetric |
| Median Diameter D50 | 1.48 ± 0.08 μm | 1.52 ± 0.12 μm | 1.55 ± 0.20 μm | ISO 13320 (Laser Diffraction) |
| Iron Impurity (Fe) | ≤ 0.05% | ≤ 0.12% | ≤ 0.20% | ICP-OES / ASTM E34 |
| Silicon Impurity (Si) | ≤ 0.04% | ≤ 0.08% | ≤ 0.15% | Spectrophotometry |
| Moisture (H2O Content) | ≤ 0.03% | ≤ 0.05% | ≤ 0.08% | Karl Fischer Coulometric Titration |
| Specific Surface Area (BET) | 5.20 – 5.90 m²/g | 4.80 – 5.60 m²/g | 4.50 – 5.20 m²/g | N² Adsorption BET Method |
Procurement directors and R&D engineers across North America, the European Union, East Asia, and the Middle East operate under contrasting regulatory and technical demands. Sourcing from certified Chinese manufacturers delivers substantial cost reduction and volumetric capacity when handled through compliance-engineered supply chains.
In crystalline silicon solar cell manufacturing, conductive aluminum pastes require strict 1.5 µm particle distributions. During high-temperature rapid sintering (750°C - 850°C), this powder forms a low-resistance ohmic contact and a uniform p+ silicon-aluminum eutectic layer, directly dictating photoelectric conversion efficiency.
Procurement KPI: Low trace iron (<300 ppm) to prevent carrier recombination traps and narrow particle distribution to eliminate screen mesh abrasion during high-speed printing lines.
Solid rocket motors and specialized energetic formulations utilize 1.5 µm spherical aluminum as a primary combustion enthalpy booster. The ultrafine sizing shortens combustion zone residence times, accelerates deflagration rates, and reduces two-phase flow kinetic losses in rocket nozzle expansions compared to standard 10–30 µm powders.
Procurement KPI: Active metallic aluminum (>98.5%), strictly verified moisture levels (<0.05%), and certified compatibility with hydroxyl-terminated polybutadiene (HTPB) binder systems.
Modern high-power GPUs, automotive EV inverters, and AI accelerators demand thermal interface greases and phase-change pads exceeding 8–12 W/m·K. Integrating 1.5 µm spherical aluminum powder enables multi-modal particle packing alongside sub-micron zinc oxide or micron boron nitride, filling interstitial micro-voids without triggering rheological shear thickening.
Procurement KPI: Complete absence of aggregate agglomerates (>5 µm) to achieve minimal bond line thickness (BLT < 25 µm).
Unlike commoditized 300-mesh industrial aluminum flakes, 1.5 µm spherical aluminum powder is an engineered specialty chemical. Pricing is structurally calculated based on pure aluminum ingot base prices (LME or Shanghai Metal Exchange - SME) augmented by gas atomization power inputs, inert gas consumption, precision cyclonic classification yields, and moisture-proof packaging.
International procurement contracts with Yanxatech (YANXA) utilize a transparent pricing index mechanism updated bi-weekly or fixed quarterly:
*Processing premiums for 1.5 micron powders are higher than 10 micron powders due to cyclone recovery yields typically settling around 28% to 42% per single atomization run, requiring multiple re-circulation passes.
Current reference spot pricing based on primary aluminum trading bands of $2,300 – $2,550/MT ingot basis:
| Order Tier | Quantity Bracket | FOB Shanghai / Qingdao | Packaging Format |
|---|---|---|---|
| Pilot / Trial | 100 kg – 500 kg | $18.50 – $24.00 / kg | 20 kg UN Steel Drum + Argon Flush |
| Commercial Mid | 1,000 kg – 5,000 kg | $14.20 – $17.80 / kg | 25 kg Drum / Moisture Barrier Foil |
| Bulk Annual | 10,000 kg + | $10.50 – $13.60 / kg | Full Containerload (FCL) Custom Drums |
Achieving an ultranarrow D50 distribution of 1.50 microns requires overcoming surface tension and viscous resistance in molten pure aluminum. Our partnering facilities leverage closed-loop supersonic gas atomization coupled with multi-stage cyclonic vortex separation.
Virgin aluminum ingots (≥99.85% purity) are molten under vacuum or high-purity argon shield at 780°C - 820°C. Rotary impeller degassing with high-purity argon reduces dissolved hydrogen below 0.12 mL/100g, preventing internal microporosity.
Molten aluminum is fed through ceramic nozzles where high-pressure inert gas (Ar/N₂) at Mach 2.2–2.8 shears the stream into microscopic droplets. Rapid quenching rates (10⁵ to 10⁶ K/s) suppress microsegregation and solidify droplets into perfect spheres.
Powder passes through automated aerodynamic multi-rotor classifiers. The centrifugal-aerodynamic force balance strictly isolates cut fractions between 1.0 µm and 2.5 µm, recycling coarse fractions back to the induction furnace.
Freshly classified powder enters a passivation chamber with oxygen dosed at parts-per-million levels. This creates an impervious 3nm oxide layer, passivating the metal against runaway hydration and exothermic self-heating.
1.5 Micron Aluminum Powder is classified as a hazardous chemical due to its water-reactive flammability. Safe, compliant international delivery requires an airtight regulatory chain from Chinese export permits through port hazmat clearance to your localized discharge warehouse.
Designated under UN 1396, ALUMINIUM POWDER, UNCOATED, Hazard Class 4.3 (Substances which, in contact with water, emit flammable gases), Packing Group II. Every consignment ships with verified GHS-compliant Safety Data Sheets (SDS in 16 standardized sections) and Chinese Dangerous Goods Declaration documentation.
Packed in UN-approved steel drums (1A2/Y1.5) with sealed internal antistatic aluminum-foil laminated multi-layer vacuum barrier bags. Bags are evacuated, dosed with high-purity dry nitrogen gas to prevent residual air exposure, and packed with moisture desiccant strips to ensure stability during ocean transit.
Departing directly through specialized hazardous chemical terminals at Shanghai, Qingdao, and Ningbo ports. Coordinated with major class-certified shipping carriers (Maersk, MSC, COSCO) adhering to IMDG segregation rules (away from Class 5.1 oxidizers and Class 8 acids).
Clear, auditable answers to the core questions raised by procurement managers, metallurgical engineers, and quality assurance directors.
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