Dailymag Ceramic Disc Magnet
Ceramic disc magnets are typically flat and round-shaped magnets made from ceramic materials. They are usually made by combining iron oxide with either strontium or barium compounds. They can be made in various thicknesses and are durable with strong magnetic properties.
The round black flat ferrite ceramic disc magnet is used for phones, audio, ammeter, speaker, TV, DC permanent magnet on motors or in cars and etc.
Our neodymium round ceramic disc magnets is used for wind generators, medical equipment, sensors, motors, loudspeakers, file automobiles, and more.
The strontium power barium round ceramic magnet is available in sizes and shapes. Its material is made in sintered neodymium magnets.
Dailymag offers customized ring block arc ceramic disc magnets that are used for magnetic holders, wind generators, medical equipment, etc. Its magnetization is available in thickness, radial, and axial.
We provide permanent ferrite ceramic disc magnets that offer good resistance and a high relatively operation. It has a shape of a trapezoid, counters sunk, block, cylinder, disc, and ring.
Our neo ceramic disc magnet offers anti-corrosion, and survival ability and has small tolerance. It is made with magnet coatings like copper, gold, silver, nickel, etc.
Our isotropic speaker ceramic disc magnet is made of different types of metal oxides such as zinc oxides, etc. It is widely used for industrial magnets.
The ferrite strong round block fridge ceramic disc magnets have a standard tolerance usually +/- 0.05mm or 0.1mm. It is processed by welding, cutting, molding, punching, decoiling, and bending.
Making a Ceramic Disc Magnet
Ceramic disc magnets are typically made by pressing the blended ceramic powder into flat disc shapes in die molds. This is made possible via a hydraulic or mechanical press which compacts the powder into a solid shape of desired dimensions.
The pressed green magnets are then sintered in a high temperature furnace eliminate any porosity fusing and densifying. This process also serves to align the magnetic domains within the ceramic material that is the source of its high magnetism.
After the sintering process, you gradually cool the ceramic magnets to room. Machine the disc magnet for precise dimensions.
Benefits of Ceramic Disc Magnet
There are several benefits derived from using ceramic disc magnets in your applications. Some of the key advantages are discussed below:
- Ceramic disc magnets cost much less than other permanent magnet types like neodymium and SmCo disc magnets. This makes them an economical choice in various applications.
- While their magnetic strength pales in comparison with that exhibited by rare-earth counterparts, ceramic disc magnets still offer strong magnetic performance. Considering their size, they can generate significant magnetic fields.
- The high coercivity of ceramic disc magnets means they display high resistance to demagnetization. As such, they can maintain their magnetism to certain elevated temperatures and external magnetic fields.
- The corrosion resistance displayed by ceramic magnets makes them durable suitable for industrial and outdoor environments. As a matter of fact, these magnets do not usually require protective coatings.
- Ceramic disc magnets are available in various sizes featuring different diameters and thicknesses. This allows for their use in different applications as small as magnetic closures in bags to as large as magnetic separators.
- It is possible to machine ceramic disc magnets to achieve a desired surface finish that suits your application needs. Since they are brittle and hard you need highly abrasive tools to achieve precise dimensions.
- Ceramic magnets do not conduct electricity making them ideal here electrical isolation is necessary. Furthermore, they exhibit low eddy current losses allowing use where minimal energy losses are critical.
Magnetizing a Ceramic Disc Magnet
magnetic domains within the material. There are several magnetization methods you can use by utilizing specialized equipment thanks in part to ceramic magnets’ high coercivity.
Some common magnetization methods used for ceramic disc magnets include:
· Electromagnetic Coil Magnetization
An external electromagnetic coil generates a strong magnetic field as current passes through it. You can achieve this using a ceramic disc with a coil. By controlling the magnetic field you can achieve the desired magnetization.
· Pulse Magnetization
Using a high-intensity magnet with a pulsating field, you can magnetize ceramic disc magnet. This is a common practice for high-performance ceramic magnets. The magnetizing current has high energy with pulsating effect.
· Rotating Field Magnetization
You will use a rotating magnetic field to magnetize ceramic disc magnet. By rotating in different directions, it helps align the magnetic domains. Usually, it is a perfect technique when you wish to achieve a multiple poles in a magnet.
Features of a Ceramic Disc Magnet
Ceramic disc magnets possess several distinct features making them suitable for various applications. Some of these are:
Availability in Different Sizes
Ceramic disc magnets come in various diameters and thicknesses depending on their design and application requirements. These dimeters and thicknesses can vary from a few millimeters to several centimeters.
There are two pole configurations popularly used on ceramic disc magnets: bipolar and multipole configurations. Most ceramic disc magnets are bipolar with two magnetic poles (north pole and south pole).
On the other hand, multipole ceramic disc magnets have alternating north and south poles configured around the magnet circumference. Multipole ceramic disc magnets are less common since the manufacturing process is highly complex and expensive.
A ceramic disc magnet’s pull rating defines its pull strength or holding force. It is the maximum force you need to pull the magnet away from the attracted material. Pull strength is affected by factors like magnet size, thickness, material being attracted, surface finish, temperature, and magnetic orientation.
Pull strength is determined through laboratory testing under controlled conditions and measured in pounds or kilograms. A ceramic disc magnet’s pull strength will determine if it can securely hold objects and perform its intended function.
This refers to the alignment of the magnetic domains within the ceramic disc magnet along a specific axis or direction. Ceramic disc magnets can be uniaxially magnetized, axially magnetized or diametrically magnetized.
- Uniaxial Magnetization: The magnetic domains are aligned along a single axis creating a distinct north pole and south pole.
- Axial Magnetization: The magnetic field lines run perpendicular to the magnet faces. This results in one face as the north pole and the opposite other as the south pole.
- Diametric Magnetization: The magnetization axis is aligned along the ceramic disc’s diameter rather than through its thickness. The result is that the north and south poles are located on the curved surfaces of the magnet.
Uses of a Ceramic Disc Magnet
They are widely available and affordable offering strong magnetic properties. Some common uses of ceramic disc magnets are discussed below:
Ceramic disc magnets can be used in making magnetic closures or latches for furniture like cabinets, doors, drawers, and jewelry boxes.
Used as Sensors
When used in proximity sensors and reed switches, ceramic disc magnets detect magnetic field presence. This allows for their use in security systems and automotive applications like window and door sensors.
Motors and Generators
These magnets are utilized in electromechanical devices such as small electric motors and generators. Ceramic disc magnets provide a magnetic field for running the motor.
Headphones and Loudspeakers
The use of ceramic disc magnets in headphones and loudspeakers is useful in the conversion of electrical signals into sound.
Magnetic Coupling Applications
Magnetic couplings utilize ceramic disc magnets to transmit torque between rotating components such as in pumps and other fluid-handling systems.
Magnetic Separations Applications
These magnets are employed in magnetic separation equipment aiding in the removal of ferrous contaminants from liquid and/or solid mixtures. A typical example of such use is in food processing and recycling.
Many sensors used in vehicles such as throttle position sensors and speed sensors can be fashioned from ceramic disc magnets.
DIY and Craft Projects
These magnets are utilized by hobbyists in personal projects such as making crafts and DIY. These magnets can be used to make art installations, jewelry, and sculptures.