Highly saturated magnetic flux density and low loss NiMnZn power ferrite and method for preparing the same

Abstract

The invention relates to a Ni-Mn-Zn ferrite and the preparation method, in particular to a high saturation magnetic flux density low Ni-Mn-Zn power loss ferrite and the preparation method. The main technical proposal of the invention is: the ferrite comprises components with the following molar percentage: Fe2O3:53 to 55mol%, MnO:35 to 37mol%, ZnO:5 to 8mol%, NiO:2 to 4mol%. The invention has an advantage of providing a high saturation magnetic flux density low Ni-Mn-Zn power loss ferrite with reasonable design, high saturation magnetic flux density, high frequency and low power loss.

Description

technical field

[0001] The invention relates to a nickel-manganese-zinc ferrite and a preparation method thereof, in particular to a NiMnZn power ferrite with high saturation magnetic flux density and low loss and a preparation method thereof. Background technique

[0002] With the popularization of portable mobile electronic devices, the rapid development of multimedia communications and digital networks, and the needs of electromagnetic compatibility and anti-electromagnetic interference, higher and newer requirements are put forward for power ferrite materials. Switching power supplies require high saturation magnetic flux density, good DC superposition characteristics and low power loss for transformer output choke cores, while automotive power supply cores require high temperature cores due to the high temperature in the engine compartment. Under the high Bs, with the expansion of emerging application fields, the power MnZn ferrite requires not only low loss, but also h...

Examples

Embodiment 1

[0030] Embodiment 1: (1) batching, compounding: adopt main component to be Fe by mole weight percent 2 o 3 : 53~55mol%, MnO: 35~37mol%, ZnO: 2~4mol% for weighing, after weighing, add deionized water in the mixer for mixing and crushing, the particle size of the mixed material is controlled at 0.6~1.5 μm; (2) Spray granulation: The mixed slurry is sprayed and granulated to make the slurry reach a certain water content, and then prepared into granules; 750°C to 980°C, and the calcining time is 0.2 to 3 hours; (4) Pulverization: Add two or more of the following auxiliary components by weight percentage to the above calcined material: CaCO 3 : 0.03~0.1wt%, V 2 o 5 : 0.005~0.04wt%, TiO 2 : 0.005~0.07wt%, Nb 2 o 5 : 0.005~0.04wt%, ZrO 2 : 0.005~0.05wt%, Co 2 o 3 : 0.05~0.2wt%, then put the powder into the pulverizer after adding deionized water to pulverize, and prepare into a slurry, the average particle size of the solid suspended matter in the slurry is 0.9~1.15μm; (5) S...

technical field

[0001] The invention relates to a nickel-manganese-zinc ferrite and a preparation method thereof, in particular to a NiMnZn power ferrite with high saturation magnetic flux density and low loss and a preparation method thereof. Background technique

[0002] With the popularization of portable mobile electronic devices, the rapid development of multimedia communications and digital networks, and the needs of electromagnetic compatibility and anti-electromagnetic interference, higher and newer requirements are put forward for power ferrite materials. Switching power supplies require high saturation magnetic flux density, good DC superposition characteristics and low power loss for transformer output choke cores, while automotive power supply cores require high temperature cores due to the high temperature in the engine compartment. Under the high Bs, with the expansion of emerging application fields, the power MnZn ferrite requires not only low loss, but also h...

Examples

Embodiment 1

[0030] Embodiment 1: (1) batching, compounding: adopt main component to be Fe by mole weight percent 2 o 3 : 53~55mol%, MnO: 35~37mol%, ZnO: 2~4mol% for weighing, after weighing, add deionized water in the mixer for mixing and crushing, the particle size of the mixed material is controlled at 0.6~1.5 μm; (2) Spray granulation: The mixed slurry is sprayed and granulated to make the slurry reach a certain water content, and then prepared into granules; 750°C to 980°C, and the calcining time is 0.2 to 3 hours; (4) Pulverization: Add two or more of the following auxiliary components by weight percentage to the above calcined material: CaCO 3 : 0.03~0.1wt%, V 2 o 5 : 0.005~0.04wt%, TiO 2 : 0.005~0.07wt%, Nb 2 o 5 : 0.005~0.04wt%, ZrO 2 : 0.005~0.05wt%, Co 2 o 3 : 0.05~0.2wt%, then put the powder into the pulverizer after adding deionized water to pulverize, and prepare into a slurry, the average particle size of the solid suspended matter in the slurry is 0.9~1.15μm; (5) S...