Ceramic Ring Magnet
A ceramic ring magnet has a ring-like shape and can vary in size with different diameters and thickness depending on the application. The ring-like shape is a design feature that makes systems integration straightforward by simplifying mounting.
- Outer Diameter: 23.5mm Inner Diameter: 18.5mm Thickness: 11.5mm
- Features high corrosion resistance.
- Dimensions: 32mm outdoor diameter, 18mm inner diameter, and 5.5 mm thicknesses.
- Provide high thermal resistance.
- The ceramic ring magnet measuring 60x4x8mm has a tolerance rate of +/-0.05mm.
- Great use for crafts, housework, and other projects.
- Dailymag ceramic ring magnets 72x30x12mm has optimum power, resistance, and reliability.
- It has an axial magnetic field.
- The ceramic ring magnets 72x39x10mm is strong and long-lasting.
- Designed and produced utilizing cutting-edge technology.
- Ceramic ring magnets 74x40x15mm have a wide range of uses.
- Excellent for use in any office, home, hobby, crafts, etc.
- Ceramic ring magnets 50 x 25 x 10mm features a hole cut straight through the middle.
- Its functions in moderate heat.
- The ceramic ring magnets 76 x 150 x 105mm is extensively used in speaker, phone, ammeter, etc.
- Inexpensive, strong holding capabilities.
- Dailymag ceramic ring magnets 100 x 60 x 20mm is a deep charcoal gray.
- Applicable in high temperatures (over 250° C).
Ceramic Ring Magnet Features
There are several features that make the ceramic ring magnet outstanding from other ceramic magnets. Some of these features are discussed below:
Inner and Outer Diameters
Given the shape of ceramic ring magnets, they feature an inner and outer diameter. The outer diameter covers the measurement from one edge to the other making it the larger of the two diameters. It typically determines the fit of a magnet when integrating in a system.
The inner diameter refers to the measurement of the hole that gives the magnet the ring shape. It is especially useful where the application constitutes a part required to go through the magnet like a shaft. Where it is much smaller than the outer diameter, it can affect overall magnetic properties.
When talking about thickness, it refers to the magnet’s depth or height. It is the distance between its parallel and flat faces i.e. perpendicular to the magnet’s surface. Thickness defines a ceramic ring magnet’s size and can significantly influence magnetic properties and consequently performance.
For two similar magnets in all aspects but thickness, the thicker magnet will generate a stronger magnetic field compared. You need to consider the thickness of the ceramic ring magnet when fabricating its intended application to ensure it fits.
Ceramic ring magnets feature dimensional tolerance which alludes to allowable size variation from the nominal dimensions. The measurements bound by provided tolerances are the inner diameter, outer diameter and thickness.
Understanding dimensional tolerance is useful especially in the design process to ensure a standard fit and alignment. In expressing dimensional tolerance, it is provided as a deviation from the nominal dimensions usually in millimeters.
How a Ceramic Ring Magnet is Made
Ceramic ring magnets are essentially ceramic magnets shaped to look like a ring. This process is essentially conducted after the powder preparation involving iron oxide and carbonates of either strontium or barium.
After obtaining the homogenous mixture that makes the ceramic magnet material, the fine powder is pressed into a ring-like shape. This is done in a die system featuring a design in the desired magnet shape. The powder material is allowed into the die system before a punch compacts it into shape.
The formed material is thereafter dried and sintered in a furnace with controlled atmosphere eliminating moisture and fusing the particles together. At this point, you can machine the magnet material to achieve the desired dimensions.
Magnetization of a Ceramic Ring Magnet
During magnetization, you determine the orientation of the magnetic domains within the material. To do this, you subject the magnet to a massive external magnetic field in the desired direction of magnetization.
There are different methods of magnetization you can use as follows:
i. Axial Magnetization Through Thickness
In this method, you magnetize the ceramic ring magnet along its height, that is, from one flat surface to the other. The magnetic field lines therefore run perpendicular to the magnet’s flat faces forming a bipolar configuration.
This means that one face becomes the north pole while the other becomes the south pole. This method is best used where you require a strong magnetic field across the magnet surface.
ii. Radial Magnetization
This magnetization process has the magnetic field lines in the ceramic ring magnet radiating in one of two ways. This could be outward from the ring center toward the magnet’s outer diameter edge or inward from the edge.
Radial magnetization also results in a bipolar configuration with the outer edge and inner wall as the pole centers. This magnetization method is especially useful where you require a strong magnetic field at the center or edge of the ring.
Why Use Ceramic Ring Magnets
There are several ups to using ceramic ring magnets making them a perfect fit in your applications. The following list captures some of these reasons why you should consider using ceramic ring magnets:
Compared to other permanent ring magnets like NIB and SmCo, ceramic ring magnets are more affordable. You find this is due to their manufacture from readily available materials, unlike their equivalents’ rare earth materials.
Can Withstand Corruption
When using ceramic ring magnets, you are confident of their performance against corrosion. These magnets are made from materials that can withstand corrosive elements such as humidity.
Ceramic ring magnets exhibit magnetic stability capable of maintaining a magnetic field over time. You can therefore use these magnets where a persistent magnetic field is desired for optimal performance e.g. in electric motors and speakers.
Different Sizes Available
The availability of ceramic ring magnets in different sizes allows varied applications making them easy to integrate into systems.
Can Withstand High Temperature
You can utilize ceramic ring magnets in relatively high-temperature applications without fearing a loss of magnetic properties. This is in part thanks to their high coercivity making them resistant to demagnetization.
Where to Use Ceramic Ring Magnets
The design of ceramic ring magnets allows for their implementation in magnetic couplings like those used in pump systems. In this application, their magnetic force is utilized in torque transmission devoid of physical contact between the rotating and stationary parts.