Physical Properties
Al2MO3(99.5% Alumina) | |
---|---|
Specific Gravity | 3.9 - 3.939 |
Flexural Strength(N/mm2) | 360 |
Volume Resistivity(Ω・m) | >1012 |
Thermal Conductivity(W/(m・K)) | 32(20℃) |
Linear Expansion Coefficient(K-1) | 7.2×10-6(40 - 400℃) |
Vickers Hardness(GPa) | 15.5 |
Maximum Duty Temperature(℃)(GPa) | 1500 |
- Values in chart are for reference only. They are not guaranteed values.
Chemical Resistance of Ceramic Screws
Chemical Name | Temperature | Hour | Effect |
---|---|---|---|
35% Hydrochloric Acid | Boiling | 30 minutes | ◎ |
70% Nitric Acid | Boiling | 30 minutes | ◎ |
98% Sulfuric Acid | Boiling | 30 minutes | ◎ |
90% Phosphoric Acid | Boiling | 30 minutes | 〇 |
60% Hydrofluoric Acid | 20℃ | 24 hours | △ |
10% Potassium Hydroxide | 80℃ | 7 Days | ◎ |
Potassium Hydroxide | 500℃(Boiling) | 24 hours | △ |
Sodium Hydroxide | 500℃(Boiling) | 24 hours | 〇 |
Sodium Carbonate | 900℃(Boiling) | 24 hours | 〇 |
Sodium Sulfate | 1000℃(Boiling) | 24 hours | ◎ |
Potassium Fluoride | 90℃(Boiling) | 4 hours | × |
- ◎:No Corrosion
- 〇:Slight Corrosion
- △:Moderate Corrosion
- ×:Heavy Corrosion
- When tightening ceramic screws, use a torque driver or torque wrench and do not exceed the torsional torque.The recommended torque is 50% of the torsional torque.
M | Torsional Torque (N・m) |
---|---|
M3 | 0.04 |
M4 | 0.05 |
M5 | 0.10 |
M6 | 0.15 |
M8 | 0.30 |
M10 | 0.50 |