阅读说明：本技术 基于居里温度和磁感应强度快速确定贫铁锰锌铁氧体成分的方法 (Method for rapidly determining components of iron-poor manganese-zinc ferrite based on Curie temperature and magnetic induction intensity ) 是由 刘国平 李斌 顾燮峰 彭春兰 黄子谦 周晓强 于 2019-11-26 设计创作，主要内容包括：本发明公开了基于居里温度和磁感应强度快速确定贫铁锰锌铁氧体成分的方法,其主成分组成及摩尔百分比为：Fe<Sub>2</Sub>O<Sub>3</Sub>占45％～52％,ZnO占18％～21％,余量为MnO的范围内,加入占总质量百分比为0.5％的Co<Sub>3</Sub>O<Sub>4</Sub>；该铁氧体的居里温度(Tc)满足Tc＝534×Fe<Sub>2</Sub>O<Sub>3</Sub>mol％-693×ZnOmol％-6.03,常温饱和磁感应强度(Bs)满足Bs＝1600×Fe<Sub>2</Sub>O<Sub>3</Sub>mol％-1300×ZnOmol％-142。本发明的方法可以快速确定贫铁锰锌铁氧体主体成分,用于指导贫铁锰锌铁氧体开发作为高频高磁导率抗EMI材料,使其满足电子设备小型化、高频化发展对高频高磁导率材料的精确需求。(The invention discloses a method for rapidly determining the components of a lean iron manganese zinc ferrite based on Curie temperature and magnetic induction intensity, which comprises the following main components in percentage by mole: fe 2 O 3 45-52 percent of ZnO, 18-21 percent of ZnO and the balance of MnO, and Co accounting for 0.5 percent of the total mass percent is added 3 O 4 (ii) a The ferrite has a Curie temperature (Tc) satisfying Tc 534 xFe 2 O 3 mol% -693 XZnOmol% -6.03, and the saturation magnetic induction intensity (Bs) at normal temperature meets the requirement that Bs is 1600 XFe 2 O 3 mol% -1300 xZnOmol% -142. The method can quickly determine the main body components of the lean iron manganese zinc ferrite, and is used for guiding the lean iron manganese zinc ferrite to be developed as a high-frequency high-permeability anti-EMI material, so that the method meets the accurate requirements of miniaturization and high-frequency development of electronic equipment on the high-frequency high-permeability material.)

1. The iron-poor manganese-zinc ferrite is characterized by comprising the following main components in percentage by mole: fe₂O₃45-52 percent of ZnO, 18-21 percent of ZnO and the balance of MnO, and Co accounting for 0.5 percent of the total mass percent is added₃O₄(ii) a Wherein:

the Curie temperature (Tc) of the iron-poor manganese-zinc ferrite satisfies the following formula (I):

Tc＝534×Fe₂O₃mol％-693×ZnOmol％-6.03 (Ⅰ)；

the normal temperature saturation magnetic induction (Bs) of the iron-poor manganese-zinc ferrite meets the following formula (II):

Bs＝1600×Fe₂O₃mol％-1300×ZnOmol％-142 (Ⅱ)。

2. the iron-depleted manganese-zinc ferrite of claim 1, wherein the iron-depleted manganese-zinc ferrite comprises the following main components in percentage by mole: fe₂O₃45.5 to 51 percent of ZnO, 19 to 20.2 percent of ZnO and the balance of MnO, and Co accounting for 0.5 percent of the total mass percent is added₃O₄(ii) a Wherein:

the Curie temperature (Tc) of the iron-poor manganese-zinc ferrite satisfies the following formula (I):

Tc＝534×Fe₂O₃mol％-693×ZnOmol％-6.03 (Ⅰ)；

the normal temperature saturation magnetic induction (Bs) of the iron-poor manganese-zinc ferrite meets the following formula (II):

Bs＝1600×Fe₂O₃mol％-1300×ZnOmol％-142 (Ⅱ)。

Technical Field

The invention relates to a method for determining ferrite components, in particular to a method for rapidly determining the components of a poor-iron manganese-zinc ferrite based on Curie temperature and magnetic induction intensity.

Background

With the rapid development of satellite communication, mobile communication, computer application and the like, the influence of electromagnetic interference (EMI) on the military and civil electronic information fields is more and more serious, communication obstacles, image distortion and data errors can be caused, thereby causing misoperation of electronic equipment and causing great harm to public environment, personal safety and information confidentiality. At present, an effective solution to solve or reduce electromagnetic pollution and to improve the anti-electromagnetic interference capability of electronic devices is to adopt an electromagnetic compatibility design, in which a large amount of anti-EMI materials are required, and common anti-EMI materials include MnZn ferrite and NiZn ferrite materials.

Due to the development of miniaturization and high frequency of electronic equipment, a high-frequency high-permeability material is urgently needed, common MnZn ferrite is difficult to adapt to the use of frequencies above 3MHz due to low resistivity and poor high-frequency characteristics, while NiZn ferrite has porosity and high resistivity (usually up to more than 104 omega. m), and can prevent domain wall displacement relaxation and resonance of the material under certain formula and process conditions, so that the NiZn ferrite is suitable for being used as a high-frequency soft magnetic material, but the NiZn ferrite is difficult to make high permeability, so that the low-frequency impedance is low, the nickel storage amount is small, and the price is high.

At present, the iron-poor manganese-zinc ferrite has obvious advantages as a high-frequency high-permeability anti-EMI material, but the conventional manganese-zinc ferrite (Fe)₂O₃Greater than 50% and less than 59%) compared to iron-depleted manganese-zinc ferrite, whose main formulation can be estimated based on various magnetic performance parameters, iron-depleted manganese-zinc ferrite (Fe)₂O₃Mole percent of not more than 50%) is not quickly estimated, a large number of repeated tests and calculations are required, and the workload is large and cumbersome.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a method for quickly determining the components of the lean iron manganese zinc ferrite based on the Curie temperature and the magnetic induction intensity, and solves the problem of the relationship between the main components of the lean iron manganese zinc ferrite and the Curie temperature and the saturation magnetic induction intensity.

The lean iron manganese zinc ferrite comprises the following main components in percentage by mole: fe₂O₃45-52 percent of ZnO, 18-21 percent of ZnO and the balance of MnO, and simultaneously adding 0.5 percent of Co by mass percent₃O₄(ii) a Wherein:

the Curie temperature (Tc) of the iron-poor manganese-zinc ferrite satisfies the following formula (I):

Tc＝534×Fe₂O₃mol％-693×ZnOmol％-6.03 (Ⅰ)；

the normal temperature saturation magnetic induction (Bs) of the iron-poor manganese-zinc ferrite meets the following formula (II):

Bs＝1600×Fe₂O₃mol％-1300×ZnOmol％-142 (Ⅱ)。

in certain embodiments, the iron-depleted manganese-zinc ferrite major component has a composition and mole percent of: fe₂O₃45.5 to 51 percent of ZnO, 19 to 20.2 percent of ZnO and the balance of MnO, and Co accounting for 0.5 percent of the total mass percent is added₃O₄Can be obtained by the manufacturing method of Chinese patent ZL 200510027797.5; wherein: the Curie temperature (Tc) of the iron-poor manganese-zinc ferrite satisfies the following formula (I):

Tc＝534×Fe₂O₃mol％-693×ZnOmol％-6.03 (Ⅰ)；

the normal temperature saturation magnetic induction (Bs) of the iron-poor manganese-zinc ferrite meets the following formula (II):

Bs＝1600×Fe₂O₃mol％-1300×ZnOmol％-142 (Ⅱ)。

in certain embodiments, the iron-depleted manganese-zinc ferrite may be obtained by the manufacturing process of chinese patent ZL 200510027797.5.

Compared with the prior art, the method can quickly determine the main body components of the lean iron manganese zinc ferrite serving as a high-frequency high-permeability anti-EMI material, and is used for guiding the development of the lean iron manganese zinc ferrite, so that the method meets the accurate requirements of the miniaturization and high-frequency development of electronic equipment on the high-frequency high-permeability material.

Detailed Description

The present invention will be described more fully with reference to the following examples: