Strong magnetic magnet manufacturer (
The choice of shielding materials
Strong magnetic magnet manufacturer (
Shielding material selection for the shield, the choice of the type of material impact on its performance and cost greatly.
You have is important in the design of shield, is to have a thorough understanding of common used different characteristics of the shielding alloy.
Understanding of these different performance can make you to choose the appropriate materials, to meet the goals and objectives.
Magnetic shielding materials to choose according to their respective characteristics, especially the magnetic permeability and magnetic saturation performance.
Due to the change of low frequency magnetic field direction, so high permeability material (
Such as nickel alloys containing 80% Mumetal, this is a kind of high permeability iron nickel alloy)
Is often use shielding material.
These alloys to meet MIL - N - 14411 - c part 1 and ASTMA753-97 style 4 requirements.
It can get relatively thin thickness of 0.
002 to 0.
125 inches, and easy to be screened by experienced processors for processing.
In need in a tiny space to reduce magnetic field, the typical use of these alloys.
When need to provide higher than required shielding, or magnetic field intensity (
At higher field strength more typical)
Need to have a higher saturation value materials, these materials are often selected.
Only need to slightly reduce the field strength in shielding goals (
Reduced by 1 ~ 1/4)
, or strong enough to make high permeability on the spot shield saturated, ultra-low carbon steel (
May be the best choice.
The low cost material of carbon content is typically less than 0.
Compared with other steel, it has high magnetic permeability and excellent saturation performance.
These materials have smaller flexibility and than silicon steel is easy to manufacture, this allows easy to install in the large area of shield project and in the same way work out small components.
ULCS can be used with high permeability material, need to high saturation protection and high attenuation level to establish the best shield.
For cryogenic shield, Cryoperm 10 (
For the German Vaccumschmelze GmbHg company registered trademark)
As a best choice.
Like Mumetal, Cryoperm 10 is also a kind of high permeability nickel and iron, it is through special processing, and to provide the permeability increased in lower temperature.
Standard block alloy (
For example, Mumetal)
At low temperature has lost most of its permeability.
But Cryoperm10 available in 77.
3 to 4.
K of permeability increased 10 times.
Table 1 shows the most commonly used shielding material permeability saturated value comparison.
Because the material cost accounts for about half of the price of shield, so use thinner size can meet the required shielding characteristic and the structure performance is the best.
The thickness of 0.
002 to 0.
010 - inch foil is the lowest cost option.
These can foil at the same chemical composition and performance characteristics, and can be used as a standard based on nickel and ULCS materials.
Design is the most important step of low-cost shield, is the typical strong magnet material properties and its effect on the shielding performance.
Once a suitable material is selected, the focus should focus on the basic design consideration, so that it not only optimal performance, and the impact on the cost minimum.
Chemical composition: nd-fe-b materials is based on intermetallic compounds RE2FE14B permanent magnetic material.
Main ingredients for rare earth (
, iron (
, boron (
The rare earth ND for different performance available parts of dysprosium (
, praseodymium (
Other rare earth metals replace, iron can also be cobalt (
, aluminum (
And other metal parts to replace, the content of boron is small, but to form a square crystal structure between the metal compounds play an important role, yes compounds with high saturation magnetization, high uniaxial anisotropy and high Curie temperature.
Manufacturing process: sintered ndfeb permanent magnet materials using the powder metallurgy process, smelting metal powder and in the field of medium voltage after pressing, pressing in inert gas or vacuum sintering densification, in order to improve the magnet coercive force, usually need to be aging heat treatment.
Materials: sintered ndfeb permanent magnet materials have excellent magnetic, widely used in electronics, electricity, machinery, medical equipment, toys, packaging, hardware machinery, aerospace and other fields, is one of the more common permanent magnet motor, speaker, magnetic separator, computer disk drives, magnetic resonance imaging equipment instrument, etc.
Magnet company is the specialized production (
Powerful magnet company, has factories in dongguan city based wangniudun pier town.
Magnet products used in toys, jewelry, crafts gifts, handmade gift box, leather handbags invisible magnetic button, plastic hardware products, audio equipment and other industries.
Our company is located in dongguan city based wangniudun block cao beijiao town five chung village industrial zone, the company can provide customers 24 hours delivery, 36 hours to the customers specifications template.
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