SAS Offers for Commercial Sphere
MAGLAB - The Laboratory of Magnetism
The MAGLAB facilitates experimental material research of metallic soft-magnetic materials. The measuring setups are adapted for samples of toroidal and ribbon (tape) form. The range of methods in function now (November 1999) comprises:
- Automated (PC control) setup "ac amplitude permeability" enables it to investigate: -- permeability μor susceptibility x variation with exciting field H (H ranging from 1E-2 to 5E3 A/m). Measurements on toroids enable yet lower H-limit 1E-3 A/m and also sinusoidal flux conditions. -- μ or x vs frequency f variation (f ranges from 2 to 1E5 Hz where f- and H- ranges limit each other above certain level) -- aftereffects (e.g. disaccommodation of μ or x) can be measured as well at room temperature (small toroids up to 120°C). -- response of x to bi-axial, in-plane stressing can be measured on potted thin ribbons /strips. (The stress range depends on samples" cross section - ±±50 MPa is achieved for cross section of ~2E-7 m2). The influence of the potting material can be tested too by this method.
- "Hysteresisgraph" provides: --automatic recording of (digitized) ac repetitive or single-shot hysteresis loops with numeric or analog integration of induced signal. (f ranges from 1E-2 to 1E5 Hz; the need of magnetic saturation can lower the upper limit). -- response of the loop to stressing as for "ac amplitude permeability"
The methods are supported by standard sample preparation technology inclusive toroidal core construction (thin ribbon-wound cores under controlled ribbon tension), encapsulation, potting of straight strips etc.. Thermal treatment up to 700°C in Ar or N2 atmosphere is also provided.
There are also "idling" methods that can be adapted and exploited if requested. Non-destructive continuous homogeneity test of continuous ribbon-shaped materials with 0.5 cm site-to-site resolution along the ribbon exploiting eddy-current excitation (indicates not only all the above magnetic parameters, but chemical/structural heterogeneity of even non-magnetic, poorly conductive materials). Thermo-magnetic treatment of toroids up to 7.5 cm o.d. in circumferential field (up to 700 A/m, 700°C) and axial field (up to 14 kA/m, 450°C).
The MAGLAB staff is continuously engaged in applied research too and has acquired plenty of experience surpassing the limits of in-house experimental base. We are ready to apply also this experience to help to solve your problems.