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This is a round hole magnet with an outer diameter of 70mm, an inner diameter of 32mm, and a thickness of 15mm. The material is sintered ferrite, anisotropic, and the surface is uncoated. It is mainly used for speakers, speakers, and thickness magnetization.
At present, the magnets on the speakers mainly include sintered neodymium magnets and ceramic ferrite magnets. The magnetic properties of ferrites are relatively poor, and a certain volume is required to meet the driving force of the speakers, so they are generally used in larger audio speakers.
Rare earth magnetic materials (such as NdFeB), the magnetizing flux is much larger than that of ferrite, so using NdFeB magnets does not require a large diameter, so NdFeB is mostly used for small volume speakers, such as automobiles Audio.
For the same magnetic material, the larger the diameter, the saturation of magnetization, the greater the magnetic field strength, the greater the power of the speaker, the higher the sensitivity of the speaker, and the better the transient response.
Speaker magnets of other sizes;
Introduction of relevant horn magnets;
Is the magnet used in the speaker sintered NdFeB or bonded NdFeB?
How to select horn speaker magnet? It will help you after reading
Ferrite grade, sintered ferrite magnetic property parameter table
NdFeB magnet grade, Sintered neodymium magnet performance grade parameter table
Neodymium(Ndfeb) Magnet Material Safety Data Sheet
Sintered Ferrite Material Safety Data Sheet Pdf
Magnetic properties grade parameters of smco rare earth magnets
This ferrite ring magnet is manufactured using high-temperature sintering technology, featuring an outer diameter of 8mm, a 3mm square center hole, and a thickness of 3mm....
To buy round ferrite magnets, welcome to contact Courage permanent magnet manufacturers in China, our company has many sizes of ceramic round, block, arc, hole ferrite magnets, factory direct sales, low price, welcome Inquiries from customers all over the world....
This is a radial 2-pole ferrite rotor magnet, the outer diameter is 9mm, the height is 10.4mm, the inner hole is oval, it has low cost, high temperature resistance, and the maximum surface magnetic field strength is about 1130 Gauss. Welcome to consult the sample and price....
7.4x6x5mm Ferrite Small Block Magnet Introduction，Material: Hard Ferrite (Ceramic)，Shape: Block / Rectangle / Bar，Coating: No Coating，Grade (Chinese Stardard): Y30，Operating temperature: -40°C to 250°C，Delivery time: 7-15 days，Magnetization direction: thickness....
The sample is a regular radial magnetized ferrite circular magnet with a diameter of 5mm, a thickness of 2mm, a black surface, and an anisotropic grade. It is magnetized radially and has strong side magnetism, with a surface magnetic field intensity of about 750 Gauss....
This product is a round ferrite magnet with a diameter of 10mm and a thickness of 5mm, produced in China, without any surface treatment, axial magnetization, performance level Y30. Single/double chamfering, spray painting and baking varnish can be customized according to customer requirements. Welcome to inquire about samples and prices....
This is a rectangular block magnet used on the door magnetic alarm. The material is ceramic ferrite. The size is 25mm in length, 6mm in width and thickness. It is magnetized in the length direction, and the strong magnetic surface is 6x6mm....
This is a ferrite bar magnet approximately 6 inches in length, with dimensions of 150×50×10mm. It is made from sintered ferrite material (Y30) and features excellent high-temperature resistance and stable magnetic properties....