MELT-TEXTURED SUPERCONDUCTORS
for magnetic bearing, trapped field magnets
The standard form of our bulk HTS are cylinders and bars (see Standard Geomertry). Bespoke geometries and shapes, e.g. segments, rings, squares, are possible upon customer needs.
| Y-Ba-Cu-O / Geometry | Parameter | Metrics | T (K) | Conditions |
|---|---|---|---|---|
| 1.5-6.0×104 A/cm2 | 77 K | |||
| Critical current density | 1.0-3.0×105 A/cm2 | 4.2 K | Magnetization measurements in self-field | |
| Ø30 mm cylinder | Levitation force | 90 N | 77 K |
Standard NdFeB magnet Ø25mm*20 mm B=0.4 T (at surface) |
| Maximum trapped field | 1.2 T | 77 K | 1.4 T field cooling magnetization (FC) | |
| Ø30 mm mini-magnet | 16.9 T | 30 K | 18 T FC | |
| OD 30 mm ring x ID 6 mm | 9.8 T | 25 K | 10 T FC |
| Cylinder | Bar | ||
|---|---|---|---|
| Diameter (mm) | Thickness (mm) | Length x Width x Height (mm3) | Comment |
| 30 | >13 | L 40 x B 40 x H 10-13 | 1-seed |
| 33 | >13 | L 66 x B 33 x H 10-12 | 3-seeds |
| 40 | >13 | L 80 x B 40 x H 12 | 3-seeds |
| 45 | >13 | ||
| 55 – 60 | >13 |
| Property | Metric | Comment |
|---|---|---|
| Transition temperature | 90-92 K | |
| Resistivity | 0.6-0.7 mOhm/cm | at 300 K |
| Density | 6.38 g/cm3 | theoretical |
| 5.95 g/cm3 | experimental (93 %) | |
| Specific heat | 0.43 Ws/gK | at 300 K |
| Heat conductivity | 4-8 W/mK | average |
| Linear expansion | 5-12 x10-6 1/K | |
| Tensile strength | 25-30 MPa |
BULK HTS MASS PRODUCTION
SPECIAL SEEDING TECHNIQUE
Besides of large and multi-grain production, ATZ GmbH achieved special melt-textured techniques
Axial and radial ring seeding
Double seeding (top-bottom)
BULK MACHINING
- High-quality
- High precision ~ 0,1 mm
Reinforcement for high trapped field
Complex shape and form
