Tool for measuring magnetic properties at high temperatures

Details Tool for measuring magnetic properties at high temperatures Tool for measuring magnetic properties at high temperatures

2008-05-06

2008-05-06

Aurora, Reena (Department: 2862)

Electricity: measuring and testing

Magnetic

With temperature control of material or element of test circuit

Reexamination Certificate

active

07368906

ABSTRACT:
The present invention relates to a measuring tool for measuring magnetic properties of a magnetic sample in a closed loop, comprising an electromagnet in a closed loop arrangement with two pole pieces connected to a yoke, said pole pieces forming a gap for the placement of the sample, a search coil for the measurement of a flux density B of the sample and a magnetic field sensor for the measurement of a magnetic field strength H in the gap between said pole pieces. The pole pieces comprise heater elements for heating the pole pieces to temperatures of at least 400° C. and are thermally insulated against the yoke of the electromagnet. The pole pieces, the search coil and the magnetic field sensor are made of materials which resist said high temperatures. The measuring tool allows the non-destructive measurement of magnetic properties of magnetic samples in closed circle up to 500° C.

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patent: 890 286 (1981-12-01), None
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British Standards Institution, “Magnetic Materials”, Part 5. Methods of measurement of the magnetic properties of magnetically hard (permanent magnet) materials, BS 6404: Part 5: 1986, IEC 404-5: 1982.
McGann D W: “Development of a Low Loss, High Precision Permeameter for the Evaluation of High Energy Permanent Magnets” Journal of the Audio Engineering Society, Audio Engineering Society. New York, US, vol. 10, No. 3, Jul. 1962, pp. 194-199, XP000796480 ISSN: 0004-7554.
J.P. Barranger: “Very High Temperature Permeameter” Journal of Applied Phisics, vol. 42, No. 4, Mar. 15, 1971, pp. 1796-1797, XP002279210.

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