| Fine ceramic has superior mechanical, thermal, magnetic,
chemical, and insulative characteristics such as light weight, extreme hardness, high temperature strength,
high friction strength, high corrosion resistance.
They are used in a wide variety of areas including mechanical equipment, electrical parts, medical parts, aerospace and atomic parts.
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Types and Characteristics of Ceramic Balls |
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Almina balls (AI2O3)
Popular fine ceramic which has high electric insulation, strength under regular temperature
and is corrosion resistant. |
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Zirconia balls (ZrO2)
Zircona has a high melting point, is chemically stable and has low heat conductivity. |
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Silicon Nitride balls (Si3N4)
Silicon Nitride has a low thermal expansion coefficient and is excellent at bending strength, fracture toughness and heat impact resistance. |
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Silicon Carbide balls (SiC)
Silicon Carbide has a low declining mechanical strength under high temperature (more than 1000℃) and high friction resistance. |
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We believe that the fine ceramic balls will respond to the customer's expectation as a mechanical component of the new age.
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Table: Characteristics of Ceramics Materials (Generic Data)
| Item/Form |
Oxide |
Non-Oxide |
|---|
| Almina |
Zirconia |
Silicon Nitride |
Silicon Carbide |
| AI2O3 |
ZrO2 |
Si3Ｎ4 |
SiC |
| Density |
g/cmm3 |
3.60 - 3.90 |
6.00 - 6.08 |
3.22 - 3.35 |
3.10 - 3.15 |
| Thermal Expansion Coefficient |
deg-1 |
7 - 8 |
8 - 12 |
3.2 - 3.6 |
4 - 5 |
| Thermal Conductivity |
W/(m•deg) |
17 -25 |
2 - 4 |
17 - 29 |
40 - 80 |
| Elastic Coefficient |
x105MPa |
3.0 - 3.8 |
2 |
2.3 - 2.7 |
3.7 - 3.8 |
| Bending Strength |
MPa RT |
340 - 780 |
780 - 1470 |
490 - 980 |
590 - 980 |
| Compressive Strength |
MPa |
1960 - 2940 |
3920 |
1960 - 3920 |
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| Hardness |
HV |
2000 - 2100 |
1300 - 1500 |
1600 - 2100 |
2000 - 2500 |
| Operational Temperature |
°C |
1700 |
2000 |
1200 |
1400 |
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