What is the Difference Between Neodymium and Ceramic Magnets?

Neodymium and ceramic magnets are both types of permanent magnets, but they have several differences in terms of composition, strength, durability, and cost:

Composition: Neodymium magnets are made from an alloy of neodymium, iron, and boron, while ceramic magnets are made from a type of iron oxide known as ferrite.
Strength: Neodymium magnets are much stronger than ceramic magnets, with a maximum energy product that can reach up to 52 MGOe. In comparison, ceramic magnets have a maximum energy product of up to about 5 MGOe. The weakest grade of neodymium magnets can be 5-6 times stronger than the strongest grade of ceramic magnets.
Durability: Neodymium magnets are more resistant to corrosion and can withstand higher temperatures than ceramic magnets. However, they can become brittle and crack under stress. Ceramic magnets are less brittle and more resistant to demagnetization by external fields, but they are more susceptible to corrosion and can become demagnetized at high temperatures.
Cost: Neodymium magnets are generally more expensive than ceramic magnets due to their higher strength. Ceramic magnets are less costly and are often considered the most cost-effective choice when high-strength magnets are not required.

In summary, neodymium magnets are stronger and more resistant to thermal stress, making them suitable for a wide variety of applications. However, they can be more brittle and expensive than ceramic magnets. Ceramic magnets are more affordable and corrosion-resistant, but they have lower strength and can become demagnetized at high temperatures. The choice between neodymium and ceramic magnets depends on the specific requirements and constraints of the application.