JFE Chemical produces iron oxide powders, including nanoscale iron oxide, in a wide range of grades, up to the highest quality. We also supply soft ferrite powders and soft ferrite cores for electrical and electronic components. Furthermore, we strive to offer comprehensive technical services relating to magnetic materials.
Soft ferrite cores
JFE Chemical is a pioneer in supplying a variety of industries with low-loss materials for electric power supplies, high-magnetic permeability materials, as well as high-magnetic flux density materials, wide-temperature range materials, and high-frequency capable materials. From general applications to embedded implementation, we have always earned acclaim for our materials in fields including power supply transformers, choke coils, noise filters, and antennas.
Typical product shapes
|Typical characteristics of
Mn-Zn ferrite cores
|Initial magnetic permeability||Core loss
flux density (23°C) (mT)
|Curie temperature (°C)||Resistance (Ωm)|
|High-frequency capable, low-loss materials||2100||300(*)||520||≧215||10|
|High-frequency capable, low-loss materials||1250||65(**)||510||≧260||15|
|Low-loss, low-temperature coefficient materials||3300~3400||300~340||510~530||≧215~230°C||4|
|Low-loss, high-magnetic flux density materials||1600~2000||380~420||510~540 420~460(***)||≧215||6|
|High-magnetic permeability materials||5000~12000||400~434||≧115~140||0.02~0.8|
|Low-temperature coefficient, high-magnetic permeability materials||5000~7000||480||≧180|
|High-frequency capable, high-resistance materials||3800||390||≧120||50|
*300kHz,100mT,100°C **500kHz,50mT,101°C ***100°C
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|Primary grain diameter(μm)||Bulk density (g/cm3)||Initial magnetic permeability (μi)||Core loss (kW/m3)||Saturation magnetic flux density (mT)||Curie temperature (°C)|
|Mn-Zn low-loss materials||1.5-2.0||1.3||2200 – 4500||300-600||490-500||>210|
|Mn-Zn high-μ materials||1.3||1.3-1.8||6000 -12000||–||460-350||100-150|
|Ni-Zn||1.5-1.8||1.5||5 – 2000||–||220-450||80-250|
|Mean grain diameter (μm)||Cl (ppm)||SiO2 (ppm)||Ca (ppm)||Na (ppm)|