What are the differences between ceramic magnets and alnico magnets in terms of their magnetic properties and applications?

Ceramic magnets are made of ferrite material and are brittle but have good resistance to corrosion. They are relatively weak in magnetic strength but are cost-effective and widely used in applications like refrigerator magnets and speakers. Alnico magnets, on the other hand, are made of aluminum, nickel, and cobalt alloys and are stronger in magnetic strength but more expensive. They are used in applications requiring high temperature stability, such as sensors and electric motors.