Silicon nitride ceramic dewatering module is a high-performance dewatering component made of high-purity α-silicon nitride raw material, fabricated via pressureless/gas pressure sintering and precision machining.
It features superior wear resistance, corrosion resistance, high vacuum degree, long service life and anti-slurry adhesion. It can greatly improve dewatering efficiency and paper forming quality, and serves as an ideal replacement for traditional dewatering parts made of rubber, polyurethane and zirconia.
Manufactured from advanced silicon nitride (Si₃N₄) ceramic substrate through high-temperature sintering and precision processing, this product is specially designed for dewatering positions in the wet end of paper machines. It offers excellent wet-state wear resistance, pulp corrosion resistance, dimensional stability and unobstructed dewatering flow channels, fully suitable for continuous papermaking production.
| Test item | Index range |
| Density | 3.2-3.25g/cm³ |
| Vickers hardness | 14.5-15.5GPa |
| Flexural strength | 700-850MPa |
| Fracture toughness | 6.5-7.5MPa*m1/2 |
| Modulus of elasticity | 310GPa |
| Poisson's ratio | 0.26 |
| Coefficient of thermal expansion | 3.0x10-6/℃ |
| Thermal conductivity | 20-40W/(m*k) |
| Recommended operating temperature | ≤1200℃ |
| Magnetic properties | Non-magnetic |
| Electrical insulation | Excellent |
| Volume resistivity | ≥1014Ω*m |
| Corrosion resistance | Excellent (except for hydrofluoric acid) |
1. Uniform dewatering, no pulp skipping, and no flocculation;
2. Smooth surface: Ra ≤ 0.2 μm, no pulp adhesion, and easy to clean;
3. Resistant to acids and alkalis, resistant to pulp corrosion, and no leaching contamination;
4. Longer service life: Ultra-high hardness and wear resistance, significantly reducing downtime for replacement;
5. More stable dewatering: Uniform vacuum distribution, improving paper uniformity and air permeability;
6. Non-stick: Low surface energy reduces screen clogging and paper breaks;
7. Clean production: No impurity leaching, no contamination of pulp or paper;
8. Cost reduction: Reduced spare part consumption and frequency of cleaning and maintenance.
1. High-speed paper machines for cultural paper, packaging paper, tissue paper, etc.;
2. Forming plates, headboxes, table plates, water-stripping plates, vacuum dewatering plates, etc.;
3. Applications such as pulp concentration, solid-liquid separation, and sludge dewatering.
