95% High Purity Aluminum Oxide Ceramic Substrate 200*200*1mm For Insulation Material
1. Description
Alumina ceramic is kind of structural ceramics, with insulation resistance, voltage resistance, high strength, good thermal conductivity, dielectric loss, stable electrical performance characteristics. Used in electronic ceramic substrates, ceramic electrical insulation, vacuum devices, devices porcelain, spark plugs and other products. We can make the part by hot injection pressing, dry pressing, isostatic pressing and extrusion productive technology etc
2.Advantages:
3.Performance
| Item | | Unit | 95 Al2O3 | 99 Al2O3 |
| Physical Characteristics | Bulk density | g/cm3 | 3.6 | 3.9 |
| Water absorption | % | 0 | 0 |
| Mechanical Characteristics | Flexural strength | Mpa | 320 | 360 |
| Hardness Vickers | Gpa | 12.2 | 15.6 |
| Elastic modulus | Gpa | 280 | 370 |
| Poisson’s ratio | - | 0.22 | 0.23 |
| Thermal Characteristics | Linear expansion coefficient | (200C-5000C) 10-6/0C | 7.1 | 8 |
| Thermal conductivity | w/(m.k) | 16 | 32 |
| Specific Heat | *10-3J/(kg*K) | 0.78 | 0.9 |
| Electrical Characteristics | Dielectric constant (1MHZ) | - | 9 | 9.9 |
| Dielectric loss angle | *10-4 | 15 | 1 |
| Dielectric strength | *106V/m | 12 | 15 |
| Processing technology |
| Process range (mm) |
| Outside Diameter | 1---300 |
| Inside Diameter | 0.5---300 |
| Length | 0.5---1200 |
| Accuracy of working (mm) |
| Perpendicularity | 0.01 |
| Concentricity | 0.01 |
| Roundness | 0.005 |
| Straightness | 0.005 |
| Parallelism | 0.01 |
| Planeness | 0.005 |
| Roughness | 0.05 |
| Fit clearance | 0.005 |
