Alumina ceramic plates
Alumina ceramic plates can withstand high temperature and maintain high strength and hardness. And it also has superb performances in electrical insulation, high chemical resistance, good were resistance and heat resistance, and low thermal expansion.
Advantage1) A variety of specifications available. 2) Satisfy various technical request 3) Lower medium spoilage 4) Good insulation performance and high temperature resistance 5) Stiffness texture
Technical Parameters
Property | Units | ||||
Al2O3 Content | % | 96 | 98 | 99.5 | 99.7 |
Density | g / cm3 | 3.70 | 3.80 | 3.90 | 3.92 |
Color | - | White | White | Ivory | Ivory |
Compressive Strength at 25 C | Mpa | 2229 | 2091 | 2512 | 2350 |
Tensile Strength at 25 C | MPa | 200 | 200 | 248 | 252 |
Flexural Strength at 25 C | MPa | 331 | 276 | 324 | 320 |
Elastic Modulus at 25 C | GPa | 290 | 331 | 366 | 380 |
Hardness : Knoop Rockwell | (Gpa) Kg/mm2 R45N | (11.7) 1196 79 | (12.5) 1276 77 | (14) 1428 85 | (15) 1510 90 |
Thermal Conductivity at 25 C | W / m-Deg K | 20.8 | 28.1 | 30.7 | 31.6 |
Coefficient of Thermal Expansion at 25-1000 C | 1 X 10-6 / Deg C | 7.9 | 8.5 | 8.1 | 8.0 |
Specific Heat at 25 C | cal / g / Deg C | .184 | .184 | .182 | .180 |
Maximum Working Temp. | Deg C | 1650 | 1650 | 1700 | 1700 |
Volume Resitivity at 25C at 700 C | ohm-cm ohm-cm | 1 X 10-13 1 X 10-8 | 1X 10-13 2.2 X 10-9 | 1 X 10-13 6 x 10-7 | 1 X 10-13 6 x 10-7 |
Dielectric Strength (at Thickness) 100Mils | ac volts per mil | 350 | 340 | 335 | 330 |
Dielectric Constant 1Mhz at 25C | e' / eo | 8.6 | 9.4 | 9.7 | 10.0 |
Dissipation Factor 1 Mhz at 25C | Tan Delta | .0004 | .0003 | .0003 | .0002 |
