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Managementul datelor experimentale in investigarea materialelor electrotehnice

Managementul datelor experimentale in investigarea materialelor electrotehnice. 2. Tipuri de date experimentale pentru caracterizarea materialelor electrotehnice. Proprietati magnetice. Structura disciplinei. 2. Tipuri de date experimentale pentru caracterizarea materialelor electrotehnice.

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Managementul datelor experimentale in investigarea materialelor electrotehnice

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  1. Managementul datelor experimentale in investigarea materialelor electrotehnice 2. Tipuri de date experimentale pentru caracterizarea materialelor electrotehnice. Proprietati magnetice Managementul datelor experimentale in investigarea materialelor electrotehnice Prof.dr.ing.Florin Ciuprina Facultatea de Inginerie Electrica, 2009-2010, master NANO, anul I

  2. Structura disciplinei

  3. 2. Tipuri de date experimentale pentru caracterizarea materialelor electrotehnice • Conductivitatea electrica a materialelor • Rigiditatea dielectrica a izolatorilor • Permitivitatea electrica a dielectricilor • Proprietati magnetice ale materialelor • Pierderi in materialele electrotehnice

  4. 2. Tipuri de date experimentale pentru caracterizarea materialelor electrotehnice • Conductivitatea electrica a materialelor • Rigiditatea dielectrica a izolatorilor • Permitivitatea electrica a dielectricilor • Proprietati magnetice ale materialelor • Pierderi in materialele electrotehnice

  5. Proprietati magnetice ale materialelor Intensitatea campului magnetic: H [A/m] Inductia magnetica: B [T] Magnetizatia:

  6. Materiale: • diamagnetice – particule magnetic nepolare • paramagnetice • feromagnetice – particule magnetic polare • ferimagnetice • antiferomagnetice

  7. Materiale: • diamagnetice – materiale nemagnetice • paramagnetice • feromagnetice • ferimagnetice • antiferomagnetice

  8. Materiale: • diamagnetice • paramagnetice • feromagnetice – materiale magnetice • ferimagnetice • antiferomagnetice

  9. Camp magnetic activ (interior):

  10. Materiale Diamagnetice Materiale diamagnetice: Cu, Au, Ag, Zn, Pb, gaze nobile, etc. Joseph Larmor (1857-1942) matematician si fizician irlandez

  11. Materiale Paramagnetice Materiale paramagnetice: Al, Cr, Mn, Na, etc. Stefan Procopiu (1890-1972), fizician roman

  12. Materiale Feromagnetice Materiale feromagnetice: Fe, Co, Ni, Gd, aliaje. Pierre-Ernest Weiss (1865-1940) fizician francez Felix Bloch (1905-1983) fizician american nascut in Elvetia

  13. Materiale Feromagnetice Mecanismul magnetizarii: deplasarea peretilor Bloch Relatia Curie-Weiss: Pierre Curie (1859-1906) fizician francez

  14. Materiale Feromagnetice

  15. Materiale ferimagnetice si antiferomagnetice • Particule magnetic polare • Domenii magnetice & pereti Bloch • Momentele magnetice ale atomilor diferiti – antiparalele in acelasi domeniu • mx ≠ my – materiale ferimagnetice • mx = my – materiale antiferomagnetice

  16. Materiale ferimagnetice • mx ≠ my – materiale ferimagnetice

  17. Materiale antiferomagnetice • mx = my – materiale antiferomagnetice Louis Eugene Felix Neel(1904-2000), fizician francez

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