Aerospace Grade Ceramic Lead Grinding Media Silicon Nitride Media Balls
Product Description
Aerospace-Grade Silicon Nitride Balls for Bearings in Jet Engines & Turbines: A Game-Changer in Aerospace Engineering
Introduction
The Superiority of Silicon Nitride Balls
Unmatched Compressive Strength
Lightweight Advantage
Thermal Resistance
Wear and Corrosion Resistance
Applications of Silicon Nitride Balls in Aerospace
Satellites and Space Missions
Jet Engines and Turbines
Mars Rovers and Deep-Space Exploration
Broader Impact and Industry Adoption
| Property | Silicon Nitride (Si3N4) | Steel (440C) | Zirconia (ZrO2) | Alumina (Al2O3) |
|---|---|---|---|---|
| Density (g/cm³) | 3.2 | 7.8 | 6.0 | 3.9 |
| Hardness (HV) | 1,400–1,600 | 700–900 | 1,200–1,300 | 1,500–1,800 |
| Fracture Toughness (MPa·m½) | 6–7 | 15–20 | 7–10 | 3–4 |
| Compressive Strength (GPa) | 2.5–3.5 | 2.0–2.5 | 2.0–2.3 | 2.0–3.0 |
●Description:
Silicon Nitride Ceramic Ball is the most ideal bearing ball for bearing applications, due to the excellent properties of silicon nitride ceramics, it has many irreplaceable advantages comparing to traditional steel materials, such as: high mechanical strength, low wear loss, good self-lubrication, low density, high corrosion resistance, good electrical insulation etc.
Therefore, Silicon Nitride Balls are mostly used for some harsh working conditions: high speed/super speed bearings, high precision bearings, bearings in vacuum, high/low temperature bearings.
Moreover, Silicon Nitride Ceramic Balls can also used as valve ball or measurement balls in chemical pumps/high temperature pumps/metdering pumps.
●Physical Properties:
|
Chemical Composition: |
Si3N4≥95% |
|
Bulk Density: |
3.2±0.05g/cm3 |
|
Elastic Modulus: |
350GPa |
|
Hardness Vickers: |
1870HV |
|
Bending Strength: |
780MPa |
|
Fracture Toughness: |
7.2MPa·m1/2 |
|
Thermal Expansion Coefficient: |
3.2 10-6/K |
|
Thermal Conductivity: |
25W/(m·K) |
● Ball Sizes/Grade :
|
Size (mm) |
Φ0.8-180 |
|||
|
Grade |
Vdws |
SPH |
Vdwl |
Ra |
|
G3 |
0.05-0.08 |
≤0.08 |
<0.13 |
0.01 |
|
G5 |
0.08-0.13 |
≤0.13 |
<0.25 |
0.014 |
|
G10 |
0.15-0.25 |
≤0.25 |
<0.5 |
0.02 |
|
G16 |
0.2-0.4 |
≤0.4 |
<0.8 |
<0.025 |
|
G20 |
0.3-0.5 |
≤0.5 |
<1 |
<0.032 |
|
G100 |
0.4-0.7 |
0.4-0.7 |
<1.4 |
<0.0105 |
Exhibition & Partner
Case
Ship to South Korea
Ship to Spain
FAQ
1. What sizes and tolerances are available?
-
Diameter range: 0.5mm to 50mm (custom sizes possible).
-
Sphericity: As low as 0.1µm (Grade 5 for ultra-precision bearings).
-
Surface finish: Ra < 0.02µm (mirror polish for low friction).
2. Are silicon nitride balls FDA-approved for medical use?
Yes! Si3N4 is biocompatible (ISO 6474-1) and used in spinal implants, dental devices, and joint replacements due to its antibacterial properties.
3. How do I choose the right Si3N4 balls for my application?
Consider:
-
Load & speed requirements (dynamic/static stress).
-
Temperature range (Si3N4 excels in high heat).
-
Chemical exposure (resistant to most acids/alkalis).
-
Electrical insulation needs (non-conductive).
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.