YBCO Levitation Disks
Characteristics
Material: Melt textured YBa2Cu3O7-x with Y2BaCuO5 excess
Basic formula: Y1.8Ba2.4Cu3.4Ox + additives
Preparation method: Seeded melt growth
Critical temperature: ~ 90 K
Shape Cylindrical: (rectangular or other requested shapes also available)
Diameter tolerance: 5 %
Trapped field profile for CSYL 28, CSYL 44
Superconducting single domain YBaCuO levitation disks with ability to trap magnetic field exhibit considerable levitation force. They are used (in combination with strong permanent magnets) in self-stabilizing frictionless magnetic bearings of very low friction. Other shapes can also be cut from the basic bulk.
| Temeperature dependence of trapped magnetic field of CSYL-21 levitation disc (21 mm diameter). | Dependence of levitation force at 77 K on levitation disc – permanent magnet distance. |
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Product range – YBCO Levitation Disks
| Levitation force1) (77 K) | 20 N - 200 N |
| Diameter | 14 mm - 75 mm |
| Height | 6 mm - 16 mm |
| Type | Diameter | Height | Levitation force1) (77 K) |
|---|---|---|---|
| CSYL-14 | 14 mm | 6 mm | 20 N |
| CSYL-21 | 21 mm | 8 mm | 40 N |
| CSYL-25 | 25 mm | 9 mm | 60 N |
| CSYL-28 | 28 mm | 10 mm | 70 N |
| CSYL-35 | 35 mm | 12 mm | 100 N |
| CSYL-44 | 44 mm | 14 mm | 150 N |
| CSYL-50 | 50 mm | 15 mm | 200 N |
| CSYL-56 | 56 mm | 16 mm | N/A |
| CSYL-75 | 75 mm | 16 mm | N/A |
1) Measured with combination of NdFeB permanent magnet of 0.5 T surface magnetic field. Magnets diameters and heights: 15 mm (CSYL-14, CSYL-21), 20 mm (CSYL-25, CSYL-28), 25 mm (CSYL-35), and 30 mm (CSYL-44, CSYL-50). The levitation force is extrapolated to zero distance.