세라믹 물성표
| Item | Silicon Nitride(Si₃N₄) | Silicon Carbide(SiC) | |||
|---|---|---|---|---|---|
| Appearance | Dense | Dense | |||
| Color | Black | Gray | |||
| Contents （％） | 99.9 | 99.9 | |||
| Applications | High Toughness | High Temp. Strength | |||
| Wear Resistance | Wear Resistance | ||||
| Density | kg/m3 | 3.21 | 3.18 | ||
| Water absorption | % | <0.01 | <0.01 | ||
| MECHANICAL | Vickers Hardness | 9.8N | ＧＰａ | 17.5 | 23 |
| 3-Point Bending Strength | ＲＴ | ＭＰａ | 820 | 540 | |
| 1000℃ | |||||
| 1200℃ | |||||
| 1400℃ | 540 | ||||
| Compression Strength | ＭＰａ | ||||
| Young's Modulus | ＧＰａ | 290 | 400 | ||
| Poisson's Ratio | 0.27 | 0.17 | |||
| Fracture Toughness | SEPB | ＭＰａ√ｍ | 6.0 | 4.7 | |
| THERMAL | Linear Expension Coefficient | RT~100℃ | (×10-6/℃) | 2.6 | 3.5 ~ 4 |
| RT～400℃ | |||||
| RT～800℃ | 2.8 | 4.7 | |||
| Thermal Conductivity | 20℃ | W/（m・K） | 24.0 | 100 | |
| Specific Heat | J/(kg・K) | 700 | |||
| Thermal Shock Resistance | (ΔT)℃ | 700 | 550 | ||
| ELECTRICAL | Volume Electrical Resistance | kＶ/mm | |||
| Volume Resistance | 20℃ | Ω・cm | 1＞1012 | ＞104 | |
| 300℃ | |||||
| 500℃ | |||||
| Dielectic constant | 1MHz | ||||
| Dielectical Loss Angle | 1MHz | ×10-4 | |||
| Loss factor | ×10-4 | ||||
| CHEMICAL | Acetic Acid | (60%)90℃ | WT Loss | ||
| Sulphuric Acid | (95%)95℃ | ||||
| Caustic Soda | (30%)80℃ | mg/cm2/day | |||
| OTHERS | Total Transmittance | % | |||
| Linear Transmittance | % | ||||