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Mn-Zn ferrite material with wide temperature and high initial magnetoconductivity and preparation method thereof

A technology of initial magnetic permeability and ferrite material, applied in the field of Mn-Zn ferrite material and its preparation, can solve problems such as low magnetic permeability and device failure, and achieve strong adaptability of raw materials, simple process, and expansion. Application-wide effects

Active Publication Date: 2010-10-20
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For ferrite materials with high magnetic permeability in the past, in the low temperature range, especially in the range of [-60°C~-20°C], the problem of device failure due to low magnetic permeability

Method used

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  • Mn-Zn ferrite material with wide temperature and high initial magnetoconductivity and preparation method thereof
  • Mn-Zn ferrite material with wide temperature and high initial magnetoconductivity and preparation method thereof
  • Mn-Zn ferrite material with wide temperature and high initial magnetoconductivity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The ratio is Fe 2 o 3 The three main component materials of 51.5mol%, ZnO17.5mol%, and MnO31.0mol% are weighed, mixed in a ball mill, and then pre-fired at 750°C for 4 hours, and the auxiliary component CaO is added based on the total weight of the three main components. (450ppm), Bi 2 o 3 (950ppm), through 2 hours of sand grinding, and then spray granulation to obtain ferrite powder. Press the powder into blank samples of H25×15×10 with a fully automatic dry press machine, divide 100 samples into 5 groups, and keep warm at 1380°C for 8 hours under the protection of nitrogen to obtain the desired magnetic core. The sample number is 1. The test data of each group takes 10 samples to calculate the average value, and the test results of magnetic permeability μi are shown in Table 1. The magnetic permeability μ i of embodiment 1 product and temperature T curve figure such as figure 1 , figure 2 , image 3 , Figure 4 or Figure 5 shown.

Embodiment 2

[0043] The ratio is Fe 2 o 3 The three main component materials of 55.5mol%, ZnO17.5mol%, and MnO27.0mol% are weighed, mixed in a ball mill, and then pre-fired at 950°C for 1.5 hours, and the auxiliary component CaO is added based on the total weight of the three main components. (450ppm) and MoO 3 (750ppm), through 2 hours of sand grinding, and then spray granulation to obtain ferrite powder. Press the powder into blank samples of H25×15×10 with a fully automatic dry press machine, divide 100 samples into 5 groups, and keep warm at 1320°C for 14 hours under the protection of nitrogen to obtain the desired magnetic core. The sample number is 2. The test data of each group takes 10 samples to calculate the average value, and the test results of magnetic permeability μi are shown in Table 1.

Embodiment 3

[0045] The ratio is Fe 2 o 3 The three main components of 51.5mol%, ZnO25.5mol%, and MnO23.0mol% are weighed, mixed in a ball mill, and then pre-fired at 1000°C for 1 hour, and the auxiliary component CaO is added based on the total weight of the three main components. (50ppm) and V 2 o 5 (750ppm), through 2 hours of sand grinding, and then spray granulation to obtain ferrite powder. Use a fully automatic dry press to press the powder into H25×15×10 blank samples, divide 100 samples into 5 groups, and keep warm at 1400°C for 4 hours under the protection of nitrogen to get the desired magnetic core. The sample number is 3. The test data of each group takes 10 samples to calculate the average value, and the test results of magnetic permeability μi are shown in Table 1.

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Abstract

The invention belongs to the field of soft magnetic ferrite, particularly relates to a Mn-Zn ferrite material and provides a Mn-Zn ferrite material with a high initial magnetoconductivity in a wide temperature scope. The Mn-Zn ferrite material is prepared by main components and auxiliary components. The main components are as follows: 51-56 mol% of ferric oxide, 16-26 mol% of zinc oxide and the balance manganese oxide; the auxiliary components comprise one or a combination of more of 50-500ppm of calcium oxide, 50-1000ppm of bismuth oxide, 50-800ppm of molybdenum oxide, 50-800ppm of vanadium oxide or 50-800ppm of indium oxide based on the total weight amount of the main components. In a preferred proposal, one or a combination of more of zirconium oxide, titanium oxide, cobalt oxide or niobium oxide is further added in the auxiliary components. The Mn-Zn ferrite material of the invention is prepared according to a production process of a conventional drying method, and has the characteristic that the initial magnetoconductivity mui is above 5000 within a temperature zone of minus 60 DEG C-130 DEG C, thereby meeting the requirement of electronic devices on a magnetic core with high magnetoconductivity at a lower temperature.

Description

technical field [0001] The invention belongs to the field of soft magnetic high magnetic permeability, and specifically relates to a Mn-Zn ferrite material with high initial magnetic permeability in a wide temperature range (ie -60°C to 130°C) and a preparation method thereof. Background technique [0002] Mn-Zn ferrite soft magnetic materials have been widely valued and applied due to their high initial permeability, good frequency characteristics, and low loss. Mn-Zn ferrite materials are mass-produced into transformer cores, noise filters, LAN isolation transformers and digital network transformer cores. Magnetic cores are mainly used in broadband and pulse transformers, choke coils and DSL transformers. [0003] In recent years, the global climate has been abnormal, and weather with extremely low temperatures often occurs. For example, in January 2010, the temperature in the Russian Far East dropped sharply, reaching a minimum of -55°C. This climate puts forward highe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/38C04B35/622
Inventor 毕建国王朝明严正信金鑫
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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