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N38SH belongs to the high-temperature resistance grade of sintered neodymium iron boron (NdFeB) magnets, with a high magnetic energy product and a working temperature of 150 ℃. In addition to paying attention to its magnetic properties, some engineers also want to know its specific heat and thermal conductivity to improve calculation accuracy. Let's introduce it below.
The specific heat capacity of N38SH sintered neodymium iron boron is usually about 460 J/(kg · K), which means that for every 1 ℃ increase in temperature of a 1kg N38SH magnet, approximately 460 joules of heat need to be absorbed.
The following image shows the physical and mechanical properties of N38SH (tested at 20 ℃)
The typical thermal conductivity of N38SH sintered neodymium iron boron is about 7.6 W/(m · K), which is much lower than that of copper (about 400 W/(m · K)) and aluminum (about 237 W/(m · K)). Therefore, in high-speed motors or high-power equipment, it is usually necessary to use rotor cores, shafts, aluminum shells or heat dissipation structures to timely dissipate heat.
The above is the main content of the article. If your company needs to make samples, please consult 38SH magnet quotation. The delivery time is welcome to contact us through the online customer service of the website.
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