If you heat up a magnet, it will lose its magnetism. –

If you heat up a magnet, it will lose its magnetism. –

https://www.apexmagnets.com/news-how-tos/magnet-experiments-what-happens-when-a-magnet-is-heated/

Magnet Experiments: What Happens When a Magnet is Heated

Magnet Experiments: What Happens When a Magnet is Heated

Magnets can be found in many everyday items and technologies such as cars, phones and computers. It is because of permanent magnets’ ability to create their own magnetic field that they are useful in various products and situations. However, they are not impervious. Magnet strength can be affected by certain environmental changes like temperature. The effect of temperature on neodymium magnets is one of the most interesting phenomenons to observe and evaluate. In this magnet experiment, we specifically explore how magnets react when exposed to extreme heat.

Safety Caution: Because this experiment involves potentially dangerous high temperatures and magnets, it is not intended for children and should not be conducted without the proper safety wear.

Supplies

  • Thermometer (212°F or 100°C)
  • Plastic tongs
  • Bar neodymium magnets
  • Safety goggles and gloves
  • Water
  • Stove
  • Pan
  • Plastic bowl
  • 100 ferrous paper clips

Steps

Part 1: Room Temperature Test

  1. Do a room temperature magnet test first. Pour the paper clips into a plastic bowl.
  2. Submerse one of the neodymium bar magnets into the bowl of clips and remove it, recording the number collected.
  3. Remove the paper clips from the magnet and set it aside. Replace the paper clips in the bowl.

Part 2: Hot Magnet Test

  1. Hot water and metals can cause serious burns, so it is important to take necessary safety measures. Put on safety goggles and gloves.
  2. Heat about ¾ cup water in a small pan until it reaches somewhere between 185°-212°F or  85°-100°C. At boiling point the water should be close to or within this temperature range. Use your thermometer to check that the degree is appropriate.
  3. Using the plastic tongs, gently place the neodymium magnet in the water. Be extremely careful to avoid splashing the hot water.
  4. Let the magnet heat in the water for about 15 minutes.
  5. Carefully remove the magnet from the water with the plastic tongs and place it in the bowl of paper clips.
  6. Observe and record how many paper clips are collected.
  7. Wait until the magnet is fully cooled before attempting to handle it without tongs.

Results

The heated magnet will not pick up the paper clips, or it will pick up very few depending on the temperature and time it was heated. When heated above 176° Fahrenheit (80° Celsius), magnets will quickly lose their magnetic properties. The magnet will become permanently demagnetized if exposed to these temperatures for a certain length of time or heated at a significantly higher temperature (Curie temperature).

Heat demagnetization is also dependent on what types of materials make up a magnet. Some types of magnets such as Samarium-cobalt (SmCo) have higher heat resistance. There are also other types of Neodymium-iron-boron (NdFeB) magnets that are not as susceptible to heat induced flux degradation.

The Science Behind It

Magnets are made up of atoms. In normal environmental conditions, these atoms align between the poles and foster magnetism. When exposed to hotter conditions, the particles within the magnet are moving at an increasingly faster and sporadic rate. This jumbling confuses and misaligns the particles, causing the magnetism to be lost.

Now that you have tested how heat affects magnets how do you think extreme cold will affect a magnet? Check out our other experiment on how magnets are affected by cold temperatures. Feel free to visit our magnet inventory for supplies or contact us with any magnet questions!

Photo by Aney

Categories: Magnet Experiments

Tags: magnet experiment & magnets in science

Posted On: June 10, 2014

Posted By:Leave a Reply

Sorry, you must be logged in to post a comment.Login

SearchSearch

Archives

  •   Select Month    April 2022     March 2022     February 2022     January 2022     December 2021     November 2021     October 2021     September 2021     August 2021     July 2021     June 2021     May 2021     April 2021     March 2021     February 2021     January 2021     December 2020     November 2020     October 2020     September 2020     August 2020     July 2020     June 2020     May 2020     April 2020     March 2020     February 2020     January 2020     December 2019     November 2019     October 2019     September 2019     August 2019     July 2019     June 2019     May 2019     April 2019     March 2019     February 2019     January 2019     December 2018     November 2018     October 2018     September 2018     August 2018     July 2018     June 2018     May 2018     April 2018     March 2018     February 2018     January 2018     December 2017     November 2017     October 2017     September 2017     August 2017     July 2017     June 2017     May 2017     April 2017     March 2017     February 2017     January 2017     December 2016     November 2016     October 2016     September 2016     August 2016     July 2016     June 2016     May 2016     April 2016     March 2016     February 2016     January 2016     December 2015     November 2015     October 2015     September 2015     August 2015     July 2015     June 2015     May 2015     April 2015     March 2015     February 2015     January 2015     December 2014     November 2014     October 2014     September 2014     August 2014     July 2014     June 2014     May 2014     April 2014     March 2014     February 2014     January 2014     December 2013     November 2013     October 2013     September 2013     August 2013  

Sign Up for Our Newsletter:

Receive Our NewsletterSubscribe

Copyright © 2022 Apex Magnets. All rights reserved.

Ancient Rome was eight times more densely populated than modern New York.

Leave a Reply

%d bloggers like this: