Customization: | Available |
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Certification: | RoHS, CE |
Type: | Band Heater Materials |
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1. Material: Steatite ceramic
Performance | |||||
Item | Index | Unit | Steatite ceramic | 95 Al2O3 | 96 Al2O3 |
Physical Characteristics | Bulk density | g/cm3 | 2.7 | 3.6 | 3.6 |
Water absorption | % | 0 | 0 | 0 | |
Mechanical Characteristics | Flexural strength | Mpa | 145 | 320 | 340 |
Hardness Vickers | Gpa | 5.7 | 12.2 | 13.5 | |
Elastic modulus | Gpa | 120 | 280 | 320 | |
Poisson's ratio | - | 0.21 | 0.22 | 0.23 | |
Thermal Characteristics | Linear expansion coefficient | 20-5000C 10-6/0C | 7.9 | 7.1 | 7.2 |
Thermal conductivity | w/(m.k) | 2.5 | 16 | 24 | |
Specific Heat | *10-3J/(kg*K) | 0.75 | 0.78 | 0.78 | |
Electrical Characteristics | Dielectric constant(1MHZ) | - | 6.2 | 9 | 9.4 |
Dielectric loss angle | *10-4 | 18 | 15 | 5 | |
Dielectric strength | *106V/m | 18 | 12 | 15 |
2. Properties:
Higher density, higer surface finish and unifomity than heat press cast method, excellent thermal condictivity and heat transfer, resistance against thermal shock and mechanical abuse.
3. Application:
As ceramic parts of flexible pad and channel heaters at operations of pre and postweld heat treatment; Welding process, stress-relieving, pre-heating & post heating, ship-building, other resistance-heating environment.
Item |
Unit | Steatite ceramic | 95 Al2O3 | 96 Al2O3 | 99 Al2O3 | |
Physical Characteristics | Heat resistance | 0C | 1100 | 1500 | 1550 | 1800 |
Bulk density | g/cm3 | 2.7 | 3.6 | 3.6 | 3.9 | |
Water absorption | % | 0 | 0 | 0 | 0 | |
Mechanical Characteristics |
Flexural strength | Mpa | 145 | 320 | 340 | 360 |
Hardness vickers | Gpa | 5.7 | 12.2 | 13.5 | 15.6 | |
Elastic modulus | Gpa | 120 | 280 | 320 | 370 | |
Poisson's ratio | 0.21 | 0.22 | 0.23 | 0.23 | ||
Thermal Characteristics | Linear expansion coefficient | (20-5000C) 10-6/0C | 7.9 | 7.1 | 7.2 | 8 |
Thermal conductivity | w/(m.k) | 2.5 | 16 | 24 | 32 | |
Specific Heat | *10-3J/(kg*K) | 0.75 | 0.78 | 0.78 | 0.9 | |
Electrical Characteristics | Dielectric constant (1MHZ) | - | 6.2 | 9 | 9.4 | 9.9 |
Dielectric loss angle | *10-4 | 18 | 15 | 5 | 1 | |
Dielectric strength | *106V/m | 18 | 12 | 15 | 15 | |
Processing technology | ||||||
Process range (mm) | ||||||
Outside Diameter | 1---300 | |||||
Inside Diameter | 0.5---300 | |||||
Length | 0.5---600 | |||||
Accuracy of working (mm) | ||||||
Perpendicularity | 0.001 | |||||
Concentricity | 0.001 | |||||
Roundness | 0.0005 | |||||
Straightness | 0.005 | |||||
Parallelism | 0.01 | |||||
Planeness | 0.005 | |||||
Roughness | 0.005 | |||||
Fit clearance | 0.005 |