China Neodymium And Ferrite Magnets Manufacturer & Supplier 
Is the higher the magnetic flux of a magnet, the less fragile it is? This is a commonly misunderstood question in magnet selection. They believe that high magnetic flux means strong magnetic force, which is "more robust". Is this really the case?
The answer is not necessarily, high magnetic flux does not mean that the magnet is less fragile, and there is no direct causal relationship between the two.
Firstly, let's talk about the magnetic flux of a magnet. It is an indicator of magnetic performance and has no direct relationship with mechanical strength. The magnetic flux is mainly affected by the residual magnetism (Br), volume, and magnetic circuit design of the magnet, and is used to measure the ability of the magnet to output a magnetic field. The fragility is related to the physical properties of the material, such as tensile strength, bending strength, and fracture toughness.
Whether a magnet is fragile mainly depends on the material and process. For example, sintered neodymium iron boron magnets have high magnetic flux and strong magnetic force, but their crystal structure is brittle and their impact resistance is poor. They belong to typical high magnetic performance and low toughness materials, and are more prone to breakage. The magnetic flux of bonded neodymium iron boron and injection molded neodymium iron boron is relatively low, but due to the presence of polymer binders, the overall toughness is better and less prone to cracking.
The picture shows a gold-plated circular small magnet
In practical applications, high magnetic flux magnets often have stronger suction force, and are more prone to rapid attraction and collision during assembly or use, leading to cracking.
So high magnetic flux does not mean it is not fragile. If impact resistance is required in applications, some composite materials can be selected, or high magnetic flux magnets (such as neodymium iron boron) can be encapsulated and protected with cushioning materials to solve the problem.
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