Ultralow-high-frequency-loss-power MnZn ferrite and preparation method thereof
A high-frequency loss and ferrite technology, which is applied in the advanced preparation and application of high-performance ferrite soft magnetic materials, to achieve the effects of promoting uniformity, reducing high-frequency resonance bandwidth, and improving sintering kinetics
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Embodiment 1
[0024] Utilize the method provided by the present invention to prepare high-frequency ultra-low loss MnZn power ferrite ring core, the preparation steps are as follows:
[0025] A. With high purity Fe 2 o 3 , MnCO 3 and ZnO as raw materials, according to The metering of the component raw materials was carried out with x=0.76, y=0.14, δ=0.10. First to Fe 2 o 3 , MnCO 3 Raw materials such as ZnO and ZnO are firstly ground separately until the average particle size reaches 0.8 μm, and then a uniformly mixed powder is obtained after 2.5 hours of ball milling. Furthermore, the mixed powder was pressed into a block (10x10x10mm) at 50MPa, and pre-fired in a nitrogen furnace. The pre-fired temperature was 850°C, and the synthesis time was 3.5 hours. The pre-fired product was determined to be a single-phase spinel structure MnZn by XRD. Ferrite;
[0026] B. Grind the pre-calcined material in an ethanol medium and perform secondary wet ball milling, and sort the secondary ball ...
Embodiment 2
[0037] Utilize the method provided by the present invention to prepare high-frequency ultra-low loss MnZn power ferrite ring core, the preparation steps are as follows:
[0038] A. Fe 2 o 3 , MnCO 3 and ZnO as raw materials, according to Dosing of the component raw materials is carried out, where x=0.72, y=0.22, δ=0.06. First to Fe 2 o 3 , MnCO 3 Raw materials such as ZnO and ZnO are firstly ground separately until the average particle size reaches 1.0 μm, and then a uniformly mixed powder is obtained through a ball milling process for 3.5 hours. Furthermore, the mixed powder was pressed into a block (10x10x10mm) at 80MPa, and pre-fired in a nitrogen furnace. The pre-fired temperature was 900°C, and the pre-fired time was 2.5 hours. The calcined product was determined to be a single-phase spinel structure by XRD MnZn ferrite;
[0039] B. Grinding and secondary ball milling the pre-fired synthetic materials, and sorting the secondary ball milling powder particles throu...
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