ALUMINA CERAMIC
Alumina (Al2O3) in its various degrees of purity is a versatile material that offers a combination of good mechanical and electrical properties and probably the most important oxide ceramic for widely varying technical applications. Depending on the alumina purity, particular the purity ranging from 95% to >99.7%, these aluminum oxide ceramics have variety of properties:
The technical parameters of Suntek Alumina Ceramic is as follows:
Characteristics | Item | Unit | 99.7% Alumina | 99% Alumina | 95% Alumina |
Mechanical Characteristics | Colour | Iory | Light yellow | White | |
Density | g/cm3 | 3.91 | 3.80 | 3.60 | |
Bending Strength | MPa | 370 | 310 | 300 | |
Compressive Strength | MPa | 2,500 | 2,200 | 2,300 | |
Elastic Modulus | GPa | 390 | 340 | 320 | |
Fracture Toughness | MPam1/2 | 4 | 3~4 | 3~4 | |
Weber Coefficient | M | 12 | 12 | 12 | |
Vickers Hardness | HV0.5 | 1,800 | 1,600 | 1,400 | |
Thermal Characteristics | Coefficient of Line Thermal Expansion | 10-6K-1 | 7~8 | 7~8 | 7~8 |
Thermal Conductivity | W/mK | 32 | 29 | 20 | |
Thermal Shock Resistance (Put in Water) | ∆T°C | 280 | 200 | 250 | |
Max Working Temperature | °C | 1,700 | 1,600 | 1,500 | |
Electrical Characteristics | Volume Resistance at 20°C | Ωcm | >1014 | >1014 | >1014 |
Dielectric Strength | V/m | 15×106 | 15×106 | 15×106 | |
Dielectric Constant | εr | 10 | 10 | ||
One MHZ Dielectric Loss Angle at 20°C | tanδ | 0.0001 | 0.0002 | 0.0004 | |
Chemical Characteristics | Nitric Acid (60%) 90°C |
WTLossmg/cm2/day | 0.05 | 0.10 | 0.10 |
Sulphuric Acid (95%) 95°C | 0.22 | 0.34 | 0.30 | ||
Caustic Soda (30%) 80°C | 0.04 | 0.95 | 0.90 |
ALUMINA CERAMIC
Alumina (Al2O3) in its various degrees of purity is a versatile material that offers a combination of good mechanical and electrical properties and probably the most important oxide ceramic for widely varying technical applications. Depending on the alumina purity, particular the purity ranging from 95% to >99.7%, these aluminum oxide ceramics have variety of properties:
The technical parameters of Suntek Alumina Ceramic is as follows:
Characteristics | Item | Unit | 99.7% Alumina | 99% Alumina | 95% Alumina |
Mechanical Characteristics | Colour | Iory | Light yellow | White | |
Density | g/cm3 | 3.91 | 3.80 | 3.60 | |
Bending Strength | MPa | 370 | 310 | 300 | |
Compressive Strength | MPa | 2,500 | 2,200 | 2,300 | |
Elastic Modulus | GPa | 390 | 340 | 320 | |
Fracture Toughness | MPam1/2 | 4 | 3~4 | 3~4 | |
Weber Coefficient | M | 12 | 12 | 12 | |
Vickers Hardness | HV0.5 | 1,800 | 1,600 | 1,400 | |
Thermal Characteristics | Coefficient of Line Thermal Expansion | 10-6K-1 | 7~8 | 7~8 | 7~8 |
Thermal Conductivity | W/mK | 32 | 29 | 20 | |
Thermal Shock Resistance (Put in Water) | ∆T°C | 280 | 200 | 250 | |
Max Working Temperature | °C | 1,700 | 1,600 | 1,500 | |
Electrical Characteristics | Volume Resistance at 20°C | Ωcm | >1014 | >1014 | >1014 |
Dielectric Strength | V/m | 15×106 | 15×106 | 15×106 | |
Dielectric Constant | εr | 10 | 10 | ||
One MHZ Dielectric Loss Angle at 20°C | tanδ | 0.0001 | 0.0002 | 0.0004 | |
Chemical Characteristics | Nitric Acid (60%) 90°C |
WTLossmg/cm2/day | 0.05 | 0.10 | 0.10 |
Sulphuric Acid (95%) 95°C | 0.22 | 0.34 | 0.30 | ||
Caustic Soda (30%) 80°C | 0.04 | 0.95 | 0.90 |
