Wide temperature rang, low temperature coefficient, high magnetic permeability NiZn ferrite material and its preparing method

A technology of ferrite material and low temperature coefficient, which is applied in the field of NiZn ferrite material and its preparation, can solve the problems of reducing pre-sintering and sintering temperature, large energy consumption, and increasing steel ball loss, etc., to achieve lower sintering temperature, Effect of low temperature coefficient and cost reduction

Active Publication Date: 2006-11-08
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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Problems solved by technology

[0006] The present invention is also aimed at the high sintering temperature and high energy consumption for manufacturing NiZn ferrite materials, which is not conducive to environmental protection and causes the grains of ferrite to grow abnormally, and the grains become uneven, resulting in loss and deterioration of the temperature coefficient. The disadvantage is to provide a production process of NiZn ferrite that reduces the pre-sintering and sintering t

Method used

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  • Wide temperature rang, low temperature coefficient, high magnetic permeability NiZn ferrite material and its preparing method

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[0035] Example 1

[0036] 1. Selection of raw materials: The raw materials of the low-temperature sintered Ni-Zn ferrite materials provided by the present invention are selected from industrially pure Fe 2 O 3 , ZnO, NiO and CuO.

[0037] 2. Composition design and weighing: Weigh 49mol% Fe according to mole percentage 2 O 3 , 31mol% ZnO, 9mol% NiO and 11mol% CuO.

[0038] 3. Mixing of raw materials: Put the weighed raw materials into a ball mill, add an equal weight of deionized water, and ball mill for 7 hours to make the average particle size of the raw materials 1.0μm.

[0039] 4. Pre-burning: Dry the mixed and ground raw materials and put them into the furnace for pre-burning. The pre-sintering temperature is 750℃, the pre-sintering time is 4h, the atmosphere is air, and the furnace is cooled after the pre-sintering.

[0040] 5. Secondary ball milling: Weigh the auxiliary component Cr into the pre-fired material 2 O 3 0.2wt%, MoO 3 Add 0.05wt% of the same weight of deionized w...

Example Embodiment

[0043] Example 2

[0044] 1. Selection of raw materials: The raw materials of the low-temperature sintered Ni-Zn ferrite materials provided by the present invention are selected from industrially pure Fe 2 O 3 , ZnO, NiO and CuO.

[0045] 2. Composition design and weighing: Weigh 49mol% Fe according to mole percentage 2 O 3 , 30mol% ZnO, 11mol% NiO and 10mol% CuO.

[0046] 3. Mixing of raw materials: Put the weighed raw materials into a ball mill, add an equal weight of deionized water, and ball mill for 6 hours to make the average particle size of the raw materials 1.2μm.

[0047] 4. Pre-burning: Dry the mixed and ground raw materials and put them into the furnace for pre-burning. The calcining temperature is 790℃, the calcining time is 2h, the atmosphere is air, and the furnace is cooled after calcining.

[0048] 5. Secondary ball milling: Weigh the auxiliary component Cr into the pre-fired material 2 O 3 0.1wt%, MoO 3 0.03wt%, WO 3 0.04wt% is added with equal weight of deionize...

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Abstract

The present invention relates to akind of low temperature sintered NiZn ferrite. The low temperature sintered NiZn ferrite has Fe2O3 40-50 mol%, NiO 5-10 mol%, ZnO 25-40 mol% and CuO 5-15 mol% as main components and one or several of Cr2O3, MoO3, WO3, SnO2 and V2O5 as supplementary material. The present invention has low sintering temperature and low power consumption, and the material has the features of high magnetic permeability, low specific loss and low temperature coefficient in wide temperature range, etc.

Description

technical field [0001] The invention relates to a NiZn ferrite material with a low temperature coefficient and an initial magnetic permeability of more than 1500 in the temperature range of -40°C to 85°C and a preparation method thereof. Background technique [0002] An important application of high permeability NiZn material is to prepare radio frequency broadband devices. The application of radio frequency broadband devices in television, communication, radar, instrumentation and automatic control is very common. Especially in recent years, with the continuous popularization of digital TV network and gradually replacing the existing cable TV network, a large number of new radio frequency broadband components are required in the process of network transformation. This provides a large market for RF broadband components. An important development direction of RF broadband devices is to have a wider operating frequency and be able to adapt to different working environments, ...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622
Inventor 何时金包大新张涛葛蕴刚
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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