Nickel Sintered Fiber Felt
Nickel Sintered Fiber Felt is a high-performance porous functional material, specifically fabricated from micron-grade pure nickel fibers (6~40μm) through non-woven laying, multi-layer lamination and high-temperature vacuum sintering processes. Ni felts forms a three-dimensional interconnected network structure with uniform pore distribution, featuring high porosity, large specific surface area and excellent structural integrity.
Manufacturing Process:
Nickel Fiber Preparation (drawing to obtain micron-grade continuous fibers) → Non-woven Laying (uniformly spreading fibers to form a felt blank) → Multi-layer Lamination (stacking fibers of different diameters to form gradient structure if needed) → High-temperature Sintering (vacuum sintering at 800~1100℃ to achieve metallurgical bonding between fibers) → Trimming/Calendering (adjusting thickness and flatness) → Quality Inspection → Cutting/Rolling (customized size for transportation and application).
Specification Parameters of nickel felts:
Parameter | Typical Range |
Material Grade | Pure Nickel（Purity is over 99.5%）; |
Fiber Diameter | 10~40um |
Thickness | 0.1~5.0 mm; Thickness tolerance: ±0.05 mm (thin sheets) / ±0.10 mm (thick sheets) |
Porosity | 60%~90% (adjustable by fiber diameter and sintering parameters); Standard porosity: 50%~85% |
Filtration Precision | 0.1~100um; Customizable according to fiber diameter and layer structure |
Operating Temperature | ≤600℃ (continuous service); Up to 800℃ for short-term use (pure nickel); Higher for nickel alloy grades |
Tensile Strength | ≥15 MPa (pure nickel); ≥25 MPa (nickel alloy); Varies with thickness and porosity |
Sheet size | 100x100mm 200x200mm 300x300mm..... |
Key Properties of Ni felts:
l High Porosity & Excellent Permeability: 60%~90% porosity with uniform pores, ensuring low pressure loss, large flux and stable long-term filtration.
l High Filtration Precision & Large Dirt-holding Capacity: 3D network and optional multi-layer design enable precise filtration (down to 0.1μm) with strong dirt-holding capacity and long service life.
l Excellent High-temperature & Corrosion Resistance: Continuous service at ≤600℃; pure nickel and nickel alloys resist acids, alkalis and chemicals for harsh environments.
l Superior Structural Strength & Processability: Metallurgical fiber bonding ensures stability; easy to fold, weld, punch and form into complex shapes.
l Regenerable & Cost-effective: Regenerable via calcination, chemical cleaning or backwashing (≥95% reuse rate), reducing waste and costs.
l Good Electrical & Thermal Conductivity: Inherits nickel’s conductivity, suitable for filtration with heat/electricity transfer needs.
Comparison with Other Porous Metals
Feature | Sintered Nickel Fiber Felt | Sintered Powder Porous Metal | Expanded Metal / Woven Mesh |
Structure | Random, non-woven fiber network. | Randomly packed powder particles. | Regular, geometric openings. |
Porosity | Very high (70-90%). | Moderate (30-50%). | Very high, but dependent on open area. |
Pore Size | Controllable, but tortuous path. | Very tight and precise. | Large, defined by mesh count. |
Surface Area | Extremely high. | Moderate to high. | Low. |
Permeability | Very high for a given filtration rating. | Lower, more restrictive. | Very high, but limited to coarse filtration. |
Primary Use | Electrodes, battery substrates, fine filtration of viscous fluids. | Precision fluid control, spargers, fine filtration. | Structural support, coarse screening, EMI shielding. |
