Ni flake 5-30µm, aspect 15-50:1, 60-90dB reference shielding in silicone gaskets. Aerospace-grade corrosion stability on Al, filamentary variants for plastics. Lot SE certification.
QUICK ANSWER
Flake nickel powder is lamellar nickel (5-30 µm flake, high aspect ratio) used as the conductive and magnetic filler in EMI shielding coatings, conductive gaskets, and shielding plastics — where its combination of electrical conductivity, ferromagnetic absorption, corrosion stability, and moderate cost makes it the standard filler for electromagnetic compatibility across electronics, automotive, and aerospace.
EMI shielding works by reflection (conductivity) and absorption (magnetic loss) — nickel flake provides both, unlike copper (conductive only) or ferrite (absorptive only). Loaded into silicone gaskets, acrylic coatings, or thermoplastics at 50-75% weight, the flakes overlap into percolating networks that reflect radio waves while the nickel's magnetism dissipates energy. The applications are compliance-driven: every electronic device must pass EMC regulations, and nickel-filled gaskets and coatings seal enclosures, connector backs, and cable penetrations. Buyers — gasket molders, coating formulators, compounders — purchase on flake size and aspect ratio, surface area, and shielding effectiveness data in reference formulations.
MATERIAL DATA
Lot-level controls focus on the chemistry, particle characteristics, and process values that influence manufacturing consistency and finished-part performance.
| Element | Content | Performance Role |
|---|---|---|
| Nickel (Ni) | > 99.5 wt% | Conductive and magnetic base |
| Flake size | 5-30 µm (grade dependent) | Percolation and coating rheology |
| Aspect ratio | 15-50:1 | Overlap networking — shielding effectiveness |
| Surface area (BET) | 0.5-2.0 m²/g | Dispersion and loading behavior |
| Oxygen + carbon | < 0.5 wt% combined | Surface condition for conductivity |
Final limits can be aligned with the agreed purchase specification.
APPLICATIONS
EMI gasket and shielding-component manufacture is the core market: conductive silicone gaskets (molded and extruded), form-in-place gasket dispensed on enclosure flanges, and shielding coatings sprayed into plastic housings protect everything from telecom base stations to military radios to automotive radar modules. The 5G and automotive-electronics buildout multiplies shielding points per system — every radar, camera, and domain controller needs EMC integrity — and nickel flake is the qualified filler where silver-coated alternatives are too costly. Gasket molders buy flake on shielding-effectiveness certification and lot consistency.
Coatings, plastics, and adhesives form the second stream: nickel-loaded acrylic coatings for plastic enclosure interiors (consumer and industrial electronics), antistatic and shielding thermoplastic compounds for housings and trays, and conductive adhesives for component grounding. Aerospace and defense specifications frequently mandate nickel-filled systems for their corrosion stability in galvanic contact with aluminum enclosures — a qualification moat that keeps nickel flake the default choice in demanding applications.
ELECTRONIC PASTE & CONDUCTIVE METAL POWDERS
CUSTOM SUPPLY
We supply nickel flake in 5-30 µm grades with certified aspect ratio, BET surface, and shielding-effectiveness data in reference silicone formulations, plus filamentary nickel for low-loading applications. Surface-treated grades for improved dispersion, silver-coated nickel alternatives (noting silver content ships under standard manufactured-product declarations), and formulation support are available. Not export-controlled.
We supply nickel flake in 5-30 µm grades with certified aspect ratio, BET surface, and shielding-effectiveness data in reference silicone formulations, plus filamentary nickel for low-loading applications.
Surface-treated grades for improved dispersion, silver-coated nickel alternatives (noting silver content ships under standard manufactured-product declarations), and formulation support are available.
MATERIAL COMPARISON
| Comparison Point | This Product | Silver-Coated Filler |
|---|---|---|
| Shielding effectiveness | 60-90 dB | 70-100+ dB — higher |
| Filler cost | Moderate | 3-10x higher |
| Corrosion stability | Excellent | Good (Ag), core can tarnish |
| Magnetic absorption | Yes — Ni ferromagnetic | No |
| Galvanic with Al enclosures | Compatible — spec'd in aerospace | Ag can corrode Al junctions |
| Best use | Volume EMI, aerospace, automotive | Military spec maximum shielding |
TECHNICAL FAQ
Need a different chemistry, particle range, or processing route? Our material team can review the requirement and supply window.
In reference silicone gasket formulations at 65-75% loading, our flake grades deliver 60-90 dB across 100 MHz-10 GHz. Final values depend on your formulation and geometry — we certify reference data per grade and support your compound development.
Flake for gaskets and coatings where overlapping platelets build conductivity; filamentary (chain-like) nickel for plastics where low loading must percolate in 3D. Many gasket formulators blend both.
Well — this is nickel's specification advantage: nickel-aluminum galvanic couples are among the most stable, which is why aerospace shielding specifications mandate nickel-filled silicones for aluminum enclosures.
Typically 50-65 wt% in acrylic or urethane binders for 60+ dB. Higher flake aspect ratio lowers the percolation threshold — our high-aspect grades achieve conductivity at reduced loading, preserving coating flexibility.
No. Nickel powders ship without licensing requirements.
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