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Amorphous & Nanocrystalline
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Amorphous & Nanocrystalline
Metglas® is an amorphous metal, Amorphous metals do not have crystalline structure like other magnetic materials. All the atoms in an amorphous metal are randomly arranged, thus giving it a higher resistivity (about three times) value than that for crystalline counterparts. Amorphous alloys are prepared by cooling the melt at about million degrees per second. This fast cooling does not give the atoms enough time to rearrange into stable crystalline form. As a result one gets metastable amorphous structure. Because of the absence of crystalline structure amorphous alloys are magnetically soft (lower coercivity, lower core loss, higher permeability). High resistivity gives lower loss at higher frequencies. The losses are among the lowest of any known magnetic materials.Get more news about Nanocrystalline core,you can vist our website!
Nanocrystalline or Finemet® Nanocrystalline - The precursor of FINEMET® Nanocrystalline is amorphous ribbon (non-crystalline) obtained by rapid quenching at one million °C/second from the molten metal consisting of Fe, Si, B and small amounts of Cu and Nb. These crystallized alloys have grains which are extremely uniform and small, "about ten nanometers in size". Amorphous metals which contain certain alloy elements show superior soft magnetic properties through crystallization. It was commonly known that the characteristics of soft magnetic materials are "larger crystal grains yield better soft magnetic properties". Contrary to this common belief, soft magnetic material consisting of a small, "nano-order", crystal grains have excellent soft magnetic properties.
It is well known that the higher CT core permeability, the lower measurement error & higher measurement accuracy. The silicon steel CT core can’t meet measurement accuracy under the situation of low Ampere-tums or small turn ratios. And the Fe-Ni Permalloy core’s application are limited because of their low Saturate induction and high cost. Nano-crystalline cores are getting wider usage for the 0.2，0.2s, 0.1 accuracy grade precious current transformers because of its high permeability, high magnetization and lower cost in the field of power supply systems, power energy measurement and controlling systems, dynamical system, relay protection, etc.