Revealing the Magnetic Performance Testing of NdFeB: A Key to Enhancing Product Quality
Zhejiang Innuovo Magnetics Co.,Ltd
NdFeB & SmCo , together with Ferrite magnet, they are widely used in Automotive, ,elevator, home Electronics, etc.
After producing the final NdFeB products, various tests are usually required to objectively assess the applicability and quality of the magnets, meeting the different requirements in various fields. Generally, we categorize the testing content into three aspects:
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In the previous sections, we discussed the inspection of size appearance and primary magnetic performance, which are the areas of most concern to our customers. Actually, we also conduct other auxiliary testing projects to examine whether the product performance during production meets expectations, verify whether there are any defects in the production process, and analyze and confirm the product's composition and appearance when there are anomalies or during the development of new products. Below are some common auxiliary testing projects for NdFeB:
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Density: This test measures the density of the NdFeB blank to evaluate whether the material composition and sintering process are normal, and an abnormal production process can lead to decreased density. We typically use a solid density meter for this test, based on the principle of the Archimedes displacement method.
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ICP (Inductively Coupled Plasma Spectrometer): ICP is used to detect elements such as Pr, Nd, Fe, Tb, Dy, Al, and Cu in the product. The primary aim is to determine the composition of the formula, check the raw material composition, and assess the elemental content during the production process. These elements are crucial in sintered NdFeB; understanding their concentrations can indicate whether the product is being produced correctly and guide the development of new processes. The ICP principle involves exciting sample atoms in the device, which release energy, allowing us to identify the types and concentrations of elements by comparing the detected characteristic energy with standard values.
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Content of O, C, N, H, and S Elements: This test primarily aims to determine the concentrations of O, C, N, H, and S elements in raw materials and during the production process. Abnormal levels of these elements can lead to decreased material performance. We use O, C, H analyzers to test O, N, and H elements, where samples are converted into CO, CO?, N?, and H? at high temperatures for analysis. C and S elements are analyzed using infrared sulfur-carbon analyzers, where high temperatures combust the carbon and sulfur in the samples to produce oxides for examination.
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Microstructure: The inspection of NdFeB also employs common scientific methods, such as scanning electron microscopy and energy dispersive spectroscopy. A high-energy electron beam strikes the sample, allowing us to observe surface morphology at magnifications ranging from 1,000 to 100,000 times or analyze the microcomposition of the samples.
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INNUOVO can provide you with all the above auxiliary testing projects for product performance. If you have any questions, feel free to reach out to us.
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