1K107 Premium Magnetic Material with High Permeability Nanocrystalline Core

 

Compared with other types of magnetic cores, nanocrystalline cores have the following characteristics:

 

Compared with silicon steel magnetic cores:

 

Magnetic properties: The initial permeability of nanocrystalline cores is much higher than that of silicon steel cores, reaching 60,000-150,000, while the initial permeability of silicon steel cores is usually between 1,000-5,000. The coercivity of nanocrystalline cores is also significantly lower than that of silicon steel cores, which results in less energy loss during magnetization and demagnetization. However, the saturation magnetic induction intensity of silicon steel cores is relatively high, generally 1.8-2.0T, which is higher than the 1.2-1.3T of nanocrystalline cores.

 

Frequency characteristics: Silicon steel magnetic cores are mainly suitable for power frequency (50/60Hz) scenarios. At high frequencies, their hysteresis loss and eddy current loss increase sharply, leading to severe heat generation and performance degradation. Nanocrystalline cores, on the other hand, can be used in a frequency range of 20kHz-1MHz and can still maintain excellent performance such as low loss and high permeability at high frequencies.

 

Loss: At high frequencies, the loss of nanocrystalline cores is much lower than that of silicon steel cores. Nanocrystalline materials have small grain sizes and many grain boundaries, which can effectively limit the eddy current path. In addition, their high resistivity ensures low eddy current loss. For silicon steel magnetic cores, due to their high electrical conductivity, large circular currents are induced in high-frequency alternating magnetic fields, resulting in high eddy current loss.

 

Cost: The production process of silicon steel magnetic cores is relatively simple, and the cost is low. Nanocrystalline cores have higher costs because their raw materials include precious metal elements such as niobium and their preparation process is complex.

 

 

Compared with amorphous magnetic cores:

 

Magnetic properties: The initial permeability of nanocrystalline cores is usually higher than that of amorphous magnetic cores, reaching 60,000-150,000, while the initial permeability of amorphous magnetic cores is generally between 20,000-50,000. Both have low coercivity, but the coercivity of nanocrystalline cores can be as low as below 0.5A/m, which is slightly lower than that of amorphous magnetic cores. The saturation magnetic induction intensity of amorphous magnetic cores is about 1.56T, which is slightly higher than that of nanocrystalline cores.

 

Frequency characteristics: The applicable frequency range of amorphous magnetic cores is usually 10kHz-100kHz, while that of nanocrystalline cores can reach 20kHz-1MHz. Nanocrystalline cores can maintain better performance at higher frequencies.

 

Temperature stability: The Curie temperature of nanocrystalline cores is about 570-600℃, and that of amorphous magnetic cores is about 415℃. Nanocrystalline cores have a wider operating temperature range and better performance stability at high temperatures.

 

Preparation process: Amorphous magnetic cores are mainly prepared by the rapid solidification method, in which molten metal is rapidly cooled to form an amorphous state. For nanocrystalline cores, it is necessary to first prepare amorphous alloy strips, and then perform precisely controlled crystallization annealing treatment to precipitate nanocrystalline grains in the amorphous matrix. The preparation process is more complex.

 

 

Compared with ferrite magnetic cores:

 

Magnetic properties: The saturation magnetic induction intensity of nanocrystalline cores is higher than that of ferrite magnetic cores. The saturation magnetic induction intensity of ferrite magnetic cores is generally 0.3-0.5T, while that of nanocrystalline cores can reach 1.2-1.3T. The permeability of nanocrystalline cores is also relatively high, enabling better storage and transfer of magnetic energy.

 

Frequency characteristics: Ferrite magnetic cores have good performance at high frequencies, with an applicable frequency range of 10kHz-100MHz, but their magnetic properties at low frequencies are not as good as those of nanocrystalline cores. Nanocrystalline cores perform well in the frequency range of 20kHz-1MHz, which can meet the application scenarios with high requirements for high-frequency performance.

 

Loss: At high frequencies, ferrite magnetic cores have low loss, but nanocrystalline cores also maintain a low loss level, and nanocrystalline cores have a more obvious loss advantage in the low-frequency band.

 

Temperature stability: Nanocrystalline cores have a high Curie temperature and good temperature stability, while ferrite magnetic cores are prone to demagnetization at high temperatures and have relatively poor temperature stability.

Nanocrystalline c Core specification

Core Build		Window Width		Core Height		Core Width		Core Length
a(mm)	±	b(mm)	c(mm)	d(mm)	±	e(mm)	±	f(mm)	±
9	0.5	10	32.8	15	0.5	28	1	50.8	1.25
10	0.5	11	33	20	0.5	31	1	53	2
11	0.5	13	30	20	0.5	35	1	52	2
11	0.5	13	40	20	0.5	35	1	62	2
11	0.5	13	40	25	0.5	35	1	62	2
11	0.8	13	50	25	0.5	35	1	72	2
11	0.8	13	50	30	0.5	35	1	72	2
13	0.8	15	56	25	0.5	41	1	82	2
13	0.8	15	56	30	0.5	41	1	82	2
13	0.8	15	56	35	0.5	41	1	82	2
16	0.8	20	70	25	0.5	52	1	102	3
16	1	20	70	30	0.5	52	1	102	3
16	1	20	70	40	0.5	52	1	102	3
16	1	20	70	45	1	52	1	102	3
19	1	25	83	35	1	63	1	121	3
19	1	25	83	40	1	63	1	121	3
19	1	25	83	50	1	63	1	121	3
19	1	25	90	60	1	63	1	128	3
22	1	35	85	50	1	79	1	129	4
22	1	35	85	65	1	79	1	129	4
25	1	40	85	55	1	90	1	135	4
25	1	40	85	70	1	90	1	135	4
25	1	40	85	85	1.5	90	1	135	4
30	1	40	85	85	1.5	100	1	155	4
33	1	40	105	85	1.5	106	1	171	5
Note: Additional sizes can be customized to meet specific customer requirements.