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Magnetic Materials and Electromagnets

Magnetic Materials and Electromagnets. Purpose Background Equipment List Procedure Data Discussion Conclusion. Purpose. The purpose of this experiment was to investigate the magnetic properties of matter.

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Magnetic Materials and Electromagnets

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  1. Magnetic Materials and Electromagnets Purpose Background Equipment List Procedure Data Discussion Conclusion

  2. Purpose The purpose of this experiment was to investigate the magnetic properties of matter. This investigation included evaluating the properties of various permanent magnets, as well as measuring the variations of an electromagnet as a function of coil current.

  3. Equipment List • Neodymium-Iron-Boron Disk Magnet • Ceramic Permanent Magnets • Cardboard Spacers • Cenco Electromagnet • Power Supply • Multimeter • F.W. Bell Guass/Tesla Meter

  4. Background information • The beginning of Magnets • Domain Theory • Permanent Magnets • Electromagnets • Magnets as we know them in the world today.

  5. Materials Commonly Used to Make Permanent Magnets • Neodymium Iron Boron • NeoForm-B Bonded NdFeB • Samarium Cobalt • Alnico • Ceramic Ferrite

  6. Neodymium Iron Boron • Became Available in mid-1980 • most commonly Produced Magnet • Maximum Magnetic Energy - 26-28 MGOe’s • Maximum Operating Temperature is 1500 C • Less Brittle than other magnets • High resistance to Demagnetization

  7. Ceramic Ferrite Magnets • Have been around since the mid 1950’s • Have a very Low relative cost • Maximum Magnetic Energy - 4 MGOe’s • Maximum Operating Temperature - is 3000 C • Moderate Resistance to Demagnetization • Small Cracks and Chips are common

  8. Convert Electrical Energy to Physical Motion

  9. Convert Physical Motion to Electrical Energy

  10. Produce Mechanical Energy

  11. Control, Shape or Direct an Object or Substance

  12. Procedure • Measured the Gap Length for Neodymium-Iron-Boron Magnets and for Ceramic Magnets • Measured how the Flux density changed as a function of magnet volume. • Measured the Flux Density as a function of current for an electromagnet

  13. Data - NdFeB Permanent Magnet

  14. Data - NdFeB Permanent Magnet

  15. Data - Ceramic Permanent Magnet

  16. Data - Ceramic Permanent Magnet

  17. Data - Electromagnet

  18. Discussion • Problems I encountered with the experiment • Possible Sources of Error • Interpretation of Data • Possible Methods of Improving this experiment for accuracy. • Other interesting Experiments that could be done on this subject.

  19. Discussion • Problems I encountered with the experiment • Possible Sources of Error • Interpretation of Data • Possible Methods of Improving this experiment for accuracy. • Other interesting Experiments that could be done on this subject.

  20. Conclusion • NdFeB magnets vs. Ceramic Magnets • Electromagnets

  21. References History was provied by The National Museum of Science and Technology at http://www.science-tech.nmstc.ca/engine.cfm?function=link&idx=1367&language=english#whatare Information about magnets was provided by Dexter Magnet Technologies at http://www.dextermag.com/

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