阅读说明：本技术 Ni-Zn-Cu-Co系铁氧体材料及其制备方法、铁氧体烧结体 (Ni-Zn-Cu-Co ferrite material, preparation method thereof and ferrite sintered body ) 是由 周高峰 姚燕 于 2018-06-28 设计创作，主要内容包括：本发明公开了Ni-Zn-Cu-Co系铁氧体材料及其制备方法、铁氧体烧结体,该Ni-Zn-Cu-Co系铁氧体材料包括以重量百分数计的主成份：62～70％Fe<Sub>2</Sub>O<Sub>3</Sub>、15.58～19.07％ZnO、3.38～6.76％CuO、10.34～12.08％NiO和0.1～1％Co<Sub>2</Sub>O<Sub>3</Sub>。本发明的Ni-Zn-Cu-Co系铁氧体材料及烧结体的磁导率和磁损耗特性等性能指标较现有的铁氧体材料更为均衡,可以保证近场通讯的距离和灵敏度以及设备小型化等需求。(The invention discloses a Ni-Zn-Cu-Co ferrite material, a preparation method thereof and a ferrite sintered body, wherein the Ni-Zn-Cu-Co ferrite material comprises the following main components in percentage by weight: 62-70% Fe 2 O 3 15.58 to 19.07 percent of ZnO, 3.38 to 6.76 percent of CuO, 10.34 to 12.08 percent of NiO and 0.1 to 1 percent of Co 2 O 3 . Compared with the existing ferrite material, the Ni-Zn-Cu-Co ferrite material and the sintered body have more balanced performance indexes such as magnetic permeability, magnetic loss characteristic and the like, and can meet the requirements of distance and sensitivity of near field communication, equipment miniaturization and the like.)

1. A Ni-Zn-Cu-Co series ferrite material is characterized by comprising the following main components in percentage by weight: 62-70% Fe₂O₃15.58 to 19.07 percent of ZnO, 3.38 to 6.76 percent of CuO, 10.34 to 12.08 percent of NiO and 0.1 to 1 percent of Co₂O₃。

2. The Ni-Zn-Cu-Co ferrite material according to claim 1, wherein a sintering aid Bi is further added in an amount of 0.1 to 1% by weight based on the main component₂O₃。

3. A preparation method of a Ni-Zn-Cu-Co series ferrite material is characterized by comprising the following steps:

1) according to the weight percentage: 62-70% Fe₂O₃15.58 to 19.07 percent of ZnO, 3.38 to 6.76 percent of CuO, 10.34 to 12.08 percent of NiO and 0.1 to 1 percent of Co₂O₃Weighing the raw materials;

2) grinding the raw materials in the step 1) by using a ball mill;

3) drying the ground powder, and calcining at the temperature of 500-1600 ℃ for 0.5-5 hours;

5) mixing a binder and pressing the resulting powder into a predetermined shape;

6) sintering the pressed and formed sample at the temperature of 600 ℃ and 1500 ℃ for 0.5-5 hours to prepare the Ni-Zn-Cu-Co ferrite material.

4. The method of manufacturing a Ni-Zn-Cu-Co-based ferrite material according to claim 3, further comprising, between step 3) and step 5): step 4) mixing 0.1-1 percent of sintering aid Bi in percentage by weight into the calcined powder₂O₃And ground in a ball mill.

5. The method of manufacturing a Ni-Zn-Cu-Co-based ferrite material according to claim 3, wherein the step 5) includes: mixing 10-20 wt% of binder and pressing the obtained powder under 5-100MPa to obtain predetermined shape.

6. The method of manufacturing a Ni-Zn-Cu-Co-based ferrite material according to claim 3, wherein the step 5) includes: mixing 10-20 wt% of binder and pressing the obtained powder into a predetermined shape under normal pressure.

7. The method for producing an Ni-Zn-Cu-Co ferrite material according to claim 3, wherein the volume ratio of the deionized water to the powder in the ball mill is 2 to 3:1, and the weight ratio of the ball milling balls to the powder is 2 to 3: 1.

8. The method of manufacturing a Ni-Zn-Cu-Co-based ferrite material according to claim 3, wherein the binder is PVA glue or PVB glue.

9. A ferrite sintered body produced by the production method according to any one of claims 4 to 8.

10. The Ni-Zn-Cu-Co ferrite sintered body according to claim 9, wherein the ferrite sintered body has a permeability of 50 to 350 and a magnetic loss of 0 to 0.05 at 13.56 MHz.

Technical Field

The present invention relates to a Ni-Zn-Cu-Co ferrite material, a method for producing the same, and a ferrite sintered body, and particularly to a Ni-Zn-Cu-Co ferrite material having improved magnetic permeability and magnetic loss factor, a method for producing the same, and a ferrite sintered body produced by the same.

Background

Near Field Communication (NFC) is a technology operating at a frequency of 13.56MHz for short-range wireless communication and wireless charging. The NFC technology is combined with the intelligent terminal for use, and multiple functions of payment, communication, wireless near field charging and the like can be achieved.

The ferrite material is an NFC antenna material commonly used in NFC technology. However, the performance indexes of the existing ferrite material, such as magnetic permeability and magnetic loss, are not balanced, and the ferrite material has many problems of high magnetic permeability but high magnetic loss, low magnetic loss but low magnetic permeability, and the like, and cannot simultaneously guarantee the distance and sensitivity of near field communication and the practical requirements of equipment miniaturization, and the like.

Disclosure of Invention

In view of the problems of the prior art, an object of the present invention is to provide a Ni-Zn-Cu-Co ferrite material and a Ni-Zn-Cu-Co ferrite sintered body that can ensure the balance between magnetic permeability and magnetic loss.

In order to achieve the above object, the Ni-Zn-Cu-Co ferrite material of the present invention comprises the following main components in percentage by weight: 62-70% Fe₂O₃15.58 to 19.07 percent of ZnO, 3.38 to 6.76 percent of CuO, 10.34 to 12.08 percent of NiO and 0.1 to 1 percent of Co₂O₃。

Furthermore, a sintering aid Bi with the weight of 0.1 to 1 percent of the main component is added₂O₃。

The preparation method of the Ni-Zn-Cu-Co ferrite material comprises the following steps:

1) according to the weight percentage: 62-70% Fe₂O₃15.58 to 19.07 percent of ZnO, 3.38 to 6.76 percent of CuO, 10.34 to 12.08 percent of NiO and 0.1 to 1 percent of Co₂O₃Weighing the raw materials;

2) grinding the raw materials in the step 1) by using a ball mill;

3) drying the ground powder, and calcining at the temperature of 500-1600 ℃ for 0.5-5 hours;

5) mixing a binder and pressing the resulting powder into a predetermined shape;

6) sintering the pressed and formed sample at the temperature of 600 ℃ and 1500 ℃ for 0.5-5 hours to prepare the Ni-Zn-Cu-Co ferrite material.

Further, between step 3) and step 5), further comprising: step 4) mixing 0.1-1 percent of sintering aid Bi in percentage by weight into the calcined powder₂O₃And ground in a ball mill.

Further, step 5) comprises: mixing 10-20 wt% of binder and pressing the obtained powder under 5-100MPa to obtain predetermined shape.

Further, step 5) comprises: mixing 10-20 wt% of binder and pressing the obtained powder into a predetermined shape under normal pressure.

Furthermore, the volume ratio of the deionized water to the powder in the ball mill is 2-3: 1, and the weight ratio of the ball milling balls to the powder is 2-3: 1.

Further, the binder is PVA glue or PVB glue.

The ferrite sintered body of the present invention is produced by the above production method.

Further, the ferrite sintered body has a magnetic permeability of 50 to 350 and a magnetic loss of 0 to 0.05 at 13.56 MHz.

Compared with the existing ferrite material, the Ni-Zn-Cu-Co ferrite material and the sintered body have more balanced performance indexes such as magnetic permeability, magnetic loss characteristic and the like, and can meet the requirements of distance and sensitivity of near field communication, equipment miniaturization and the like.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1a is a graph showing the relationship between the frequency and the complex permeability of a sintered Ni-Zn-Cu-Co ferrite compact of example 1 of the present invention;

FIG. 1b is a graph showing the relationship between the frequency and the magnetic loss rate of the Ni-Zn-Cu-Co ferrite sintered body of FIG. 1 a;

FIG. 2a is a graph showing the relationship between the frequency and the complex permeability of a sintered Ni-Zn-Cu-Co ferrite compact of example 2 of the present invention;

FIG. 2b is a graph showing the relationship between the frequency and the magnetic loss rate of the Ni-Zn-Cu-Co ferrite sintered body of FIG. 2 a;

FIG. 3a is a graph showing the relationship between the frequency and the complex permeability of a sintered Ni-Zn-Cu-Co ferrite compact according to example 3 of the present invention;

FIG. 3b is a graph showing the relationship between the frequency and the magnetic loss rate of the Ni-Zn-Cu-Co ferrite sintered body of FIG. 3 a;

FIG. 4a is a graph showing the relationship between the frequency and the complex permeability of a Ni-Zn-Cu-Co ferrite sintered body according to example 4 of the present invention;

FIG. 4b is a graph showing the relationship between the frequency and the magnetic loss rate of the Ni-Zn-Cu-Co ferrite sintered body of FIG. 4 a;

FIG. 5a is a graph showing the relationship between the frequency and the complex permeability of a sintered Ni-Zn-Cu-Co ferrite compact of example 5 of the present invention;

FIG. 5b is a graph showing the relationship between the frequency and the magnetic loss rate of the Ni-Zn-Cu-Co ferrite sintered body of FIG. 5 a;

FIG. 6a is a graph showing the relationship between the frequency and the complex permeability of a sintered Ni-Zn-Cu-Co ferrite compact of example 6 of the present invention;

FIG. 6b is a graph showing the relationship between the frequency and the magnetic loss rate of the Ni-Zn-Cu-Co ferrite sintered body of FIG. 6 a;

FIG. 7a is a graph showing the relationship between the frequency and the complex permeability of a Ni-Zn-Cu-Co ferrite sintered body according to example 7 of the present invention;

FIG. 7b is a graph showing the relationship between the frequency and the magnetic loss rate of the Ni-Zn-Cu-Co ferrite sintered body of FIG. 7 a;

FIG. 8a is a graph showing the relationship between the frequency and the complex permeability of a sintered Ni-Zn-Cu-Co ferrite compact of example 8 according to the present invention;

FIG. 8b is a graph showing the relationship between the frequency and the magnetic loss rate of the Ni-Zn-Cu-Co ferrite sintered body of FIG. 8 a;

FIG. 9a is a graph showing the relationship between the frequency and the complex permeability of a sintered Ni-Zn-Cu-Co ferrite compact of example 9 of the present invention;

FIG. 9b is a graph showing the relationship between the frequency and the magnetic loss rate of the Ni-Zn-Cu-Co ferrite sintered body of FIG. 9 a;

FIG. 10a is a graph showing the relationship between the frequency and the complex permeability of a sintered Ni-Zn-Cu-Co ferrite compact of example 10 of the present invention;

FIG. 10b is a graph showing the relationship between the frequency and the magnetic loss rate of the Ni-Zn-Cu-Co ferrite sintered body of FIG. 10 a;

FIG. 11a is a graph showing the relationship between the frequency and the complex permeability of a Ni-Zn-Cu-Co ferrite sintered body in example 11 of the present invention;

FIG. 11b is a graph showing the relationship between the frequency and the magnetic loss rate of the Ni-Zn-Cu-Co ferrite sintered body of FIG. 11 a.

Detailed Description

The present invention will be described in detail with reference to specific examples.