A NiZnCu ferrite material and preparing method thereof

Abstract

The invention discloses a NiZnCu ferrite material, which is a ferrite material made by adding organic additives and inorganic oxide additives in the base raw material prescription of Fe[2] O [3], NiO, or Ni [2] O [3], CuO, ZnO. The reparing method includes: adding the raw material and the organic additives into the inorganic oxide additives, mixing with water, drying, sifting; presintering; joining the organic additives again, adding water for ball milling, mixing; drying and then sifting, to obtain the inventive NiZnCu ferrite material. Granulation, molding and sintering is required during manufacturing magnet ring. Compared with the existing technology, this invention adds organic additives twice to make the prescription and process simpler, reduce the cost and presintering temperature, improve the sintering activity of the presintering material so that the sintering temperature scope becomes wider, and obtain a NiZnCu ferrite material with a good consistency of production batches, suitability for industrial production, high magnetic permeability and Q value stability.

Description

technical field [0001] The invention relates to a magnetic material, and also to a production method of the magnetic material, in particular to a NiZnCu ferrite material and a preparation method thereof. Background technique [0002] In recent years, the rapid development of electronic equipment in the direction of miniaturization, networking and multimedia has opened up many new uses for ferrite ceramic materials. Among them, one of the chip components developed rapidly to adapt to the surface mount technology - the multilayer chip inductor uses soft ferrite as the magnetic medium. Soft ferrite materials can be divided into NiZn, MnZn, NiZnCu and other ferrites according to their composition. Soft ferrite material has high magnetic permeability, high resistivity, low loss and good wear resistance. Among them, the NiZnCu ferrite has the advantages of good density, which can greatly reduce the size of the device and realize the miniaturization of the ferrite device, so it h...

AI Technical Summary

Problems solved by technology

[0004] (1) Some technical solutions add various auxiliary materials to the formula to improve the magnetic properties, resulting in complex formulas and harsh process conditions, making it difficult to realize industrial production;

[0005] (2) Some schemes introduce a variety of auxiliary materials, and the weighing of ingredients in industrial production is difficult to control, which will cause obvious differences in each batch of materials;

[0006] (3) Due to the introduction of a variety of auxiliary materials, it is not easy to mix the powder raw materials uniformly in industrial production, resulting in unstable performance of the powder, which affects the stability and reliability of the devices made by ferrite powder users

[0007] (4) For NiZnCu ferrite, the smaller the particle size distribution of the powder, the better the performance, so the sol-gel method is used to prepare high-performance NiZnCu ferrite, the purpose is to prepare nano-scale ferrite raw powder for pre-production Burning; while the sol-gel method has high cost and complicated process control, which is not easy for industrialized mass production

[0008] (5) If ball milling is used, only increase the ball milling time to grind fine powder, which will increase power consumption and cost

The ball milling medium may also bring in impurities, which will make the performance of the powder worse.

[0009] (6) Some schemes have a higher pre-firing temperature, and the temperature range is not wide, and the pre-firing temperature holding time is also longer, which is not conducive to increasing production and reducing costs