세라믹 물성표
표
| Item | Alumina(Al₂O₃) | ||||
|---|---|---|---|---|---|
| Product No. | KNM_A-11 | KNM_A-32 | |||
| Appearance | Dence | ||||
| Color | Ivory | Ivory | |||
| Contents （％） | 99.7 | 99.7 | |||
| Applications | Atmosphere sintered | Atmosphere sintered | |||
| Density | kg/m3 | 3.9↑ | 3.9↑ | ||
| Water absorption | % | <0.01 | <0.01 | ||
| MECHANICAL | Vickers Hardness | 9.8N | ＧＰａ | 17.2 | 16.7 |
| 3-Point Bending Strength | ＲＴ | ＭＰａ | 380 | 350 | |
| 1000℃ | |||||
| 1200℃ | |||||
| 1400℃ | |||||
| Compression Strength | ＭＰａ | ||||
| Young's Modulus | ＧＰａ | 380 | 370 | ||
| Poisson's Ratio | 0.23 | 0.24 | |||
| Fracture Toughness | SEPB | ＭＰａ√ｍ | |||
| THERMAL | Linear Expension Coefficient | RT~100℃ | (×10-6/℃) | ||
| RT～400℃ | 7.2 | 7.0 | |||
| RT～800℃ | 8.0 | 8.0 | |||
| Thermal Conductivity | 20℃ | W/（m・K） | 32 | 32 | |
| Specific Heat | J/(kg・K) | 0.79×103 | 0.78×103 | ||
| Thermal Shock Resistance | (ΔT)℃ | 170 | 170 | ||
| ELECTRICAL | Volume Electrical Resistance | kＶ/mm | 15×10６ | ||
| Volume Resistance | 20℃ | Ω・cm | 1＞1014 | ＞1014 | |
| 300℃ | 1013 | ||||
| 500℃ | 1010 | ||||
| Dielectic constant | 1MHz | 9.9 | 9.9 | ||
| Dielectical Loss Angle | 1MHz | ×10-4 | 1.0 | ||
| Loss factor | ×10-4 | 10 | |||
| CHEMICAL | Acetic Acid | (60%)90℃ | WT Loss | 0.05 | |
| Sulphuric Acid | (95%)95℃ | 0.22 | |||
| Caustic Soda | (30%)80℃ | mg/cm2/day | 0.04 | ||
| OTHERS | Total Transmittance | % | |||
| Linear Transmittance | % | ||||