Fe-Based Nanocrystalline Ribbon

Product Detail

Application Fields:
• Transformer cores for high frequency switch mode power supplies
• Current transformer cores for electric industry
• Transformer cores for ground-fault-interrupters
• Cores for filters, storage inductors, and reactors
• EMC common mode chokes
• Sensor cores
• Cores for saturable reactors, magnetic amplifiers, beads, and pulse compressors




Characteristics:
• High saturate induction—minimize transformer volume
• High permeability and low coercivity—promote efficiency of transformers and reduce distributional capacitance
• Low core loss—minimize temperature rise of transformers
• Excellent stability—with the highest serving temperature of 130?for long time
• Relatively low cost compared to permalloys




Properties:
Physical properties:

Saturate induction	1.25 T	Saturate magnetostriction	2´10-6
Curie temperature	560 °C	Density	7.2 g/cm3
Crystallization temperature	510 °C	Resistivity	130µO-cm
Hardness Hv	880kg/mm2




Magnetic properties:

Product type	Transverse field annealed	No field annealed	Longitudinal field annealed
Initial permeability	>3×104	>8×104	>1×104
Maximum permeability	>5×104	>45×104	>50×104
Remanace	<0.2 T	0.6 T	>0.85 T
Coercivity	<1.8A/m	<0.8A/m	<1.8A/m
Core loss (20kHz, 0.5T)	<50W/kg	<25 W/kg	<90W/kg
Core loss (100kHz, 0.3T)	<150W/kg	<150 W/kg	<300W/kg
Variation of core loss (-55 °C—125 °C)	<15%	<15%	<15%




Comparison of nanocrystalline alloy with other materials:

Material	Nanocrystalline	Permalloy	Ferrite
Saturate induction (T)	1.25	0.75	0.5
Magnetostriction (×10-6)	<2	<2	4
Resistivity (µO-cm)	80	56	106
Curie temperature (°C)	570	400	<200
Remanace (T)	0.20-1.0	-	0.20
Initial permeability (Gs/Oe)	>80,000	>80,000	-
Maximum permeability (Gs/Oe)	>200,000	600,000	<20,000
Coercivity Hc (A/m)	<2	<1	6
Core loss (20KHz,0.5T) (W/Kg)	<35	-	-
Core loss (50KHz,0.3T) (W/Kg)	<60	-	-




Specifications:

Part No.	Width, mm	Thicknes, µO	Processing status
RN1-0080	8±0.2	30±5	Cast ribbon
RN1-0100	10±0.5	30±5	Cast ribbon
RN1-0150	15±0.5	30±5	Cast ribbon
RN1-0180	18±0.5	30±5	Cast ribbon
RN1-0200	20±0.5	30±5	Cast ribbon
RN1-0250	25±1	30±5	Cast ribbon
RN1-0300	30±1	30±5	Cast ribbon
RN1-0350	35±1	30±5	Cast ribbon
RN1-0400	40±1	30±5	Cast ribbon
RN1-0080	8±0.2	26±2	Slit ribbon
RN1-0100	10±0.5	26±2	Slit ribbon
RN1-0150	15±0.5	26±2	Slit ribbon
RN1-0200	20±0.5	26±2	Slit ribbon

Ribbons with other specifications can be provided according to customer's demand.




Typical characteristic curves:



Fig.1 Hysteresis loops
Fig.2 Core loss after no-field-annealing



Fig.3 Core loss after transverse-field-annealing (left) and longitudinal-field-annealing (right)