CuZn ferrite material and preparation method thereof

A technology of ferrite material and pre-sintered material, applied in the field of electronic ceramic material production, can solve the problems of inconsistent sintering characteristics, difficult matching and co-firing, etc., and achieve the effect of small dielectric loss

Inactive Publication Date: 2019-04-23
谢柠帆
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the crystal structure of these non-magnetic dielectric materials is completely different from that of low-temperature sintered NiCuZn ferrite ceramics, and the sintering characteristics are also inconsistent, it is very difficult to achieve matching co-firing, and it is necessary to design material doping schemes and matching co-firing processes. Make a lot of attempts to get better results

Method used

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  • CuZn ferrite material and preparation method thereof
  • CuZn ferrite material and preparation method thereof

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preparation example Construction

[0034] A preparation method of CuZn ferrite material, comprising the steps of:

[0035] Step S1, with Fe 2 o 3 , CuO, and ZnO are the initial raw materials, and the mass ratio is 48% Fe 2 o 3 , 9% CuO and 43% ZnO were weighed, mixed and ball milled, and then dried to obtain a ball milled drying material;

[0036] Step S2: Sieve the primary ball-milled drying material, compact and punch holes in the crucible, raise the temperature to 800-900°C at a rate of 3°C / min-5°C / min for pre-firing, and keep warm for 2-3 hours , and then cooled to room temperature with the furnace to obtain pre-fired material;

[0037] Step 3. Take the calcined material out of the crucible and put it into a mortar for coarse powdering, and then add 1.25 wt% to 1.5 wt% Bi in the calcined material 2 o 3 and 1.5wt%~2.0wt% Nb 2 o 5 and 0.2wt%~0.4wt% SiO 2 After the three kinds of dopants, carry out secondary ball milling in the ball mill, and then dry to obtain secondary ball milling dry material;

...

Embodiment 1

[0045] Step 1, with Fe 2 o 3 , CuO, ZnO as initial raw materials, molar ratio Fe 2 o 3 , CuO, ZnO=48+x:9+y:43-x-y (x=0~1; y=-0.5~1) ratio to convert Fe 2 o 3 , CuO, ZnO mass ratio, weighing, mixing, drying after a ball mill;

[0046] Step 2. Sieve the primary ball mill drying material obtained in step 1, compact and punch holes in the crucible, raise the temperature up to 800°C at a rate of 3°C / min for pre-burning, keep the temperature for 2 hours, and cool to room temperature with the furnace to obtain Pre-fired material;

[0047] Step 3. Take out the calcined material obtained in step 2 from the crucible and put it into a mortar for coarse pulverization, and then add Bi 2 o 3 and 1.5~2.0wt% Nb 2 o 5 and 0.2~0.4wt% SiO 2 After the three kinds of dopants, perform secondary ball milling in the ball mill, the average particle size of the powder after the secondary ball milling is controlled below 1 micron, and then the secondary ball milling material is dried;

[0048...

Embodiment 2

[0052] Step 1, with Fe 2 o 3 , CuO, ZnO as initial raw materials, molar ratio Fe 2 o 3 , CuO, ZnO=48:9:43 ratio to convert Fe 2 o 3 , CuO, ZnO mass ratio, weighing, mixing, drying after a ball mill;

[0053] Step 2. Sieve the primary ball mill drying material obtained in step 1, compact and punch holes in the crucible, raise the temperature up to 800°C at a rate of 3°C / min for pre-burning, keep the temperature for 2 hours, and cool to room temperature with the furnace to obtain Pre-fired material;

[0054] Step 3, taking out the calcined material obtained in step 2 from the crucible and putting it into a mortar for coarse pulverization, then adding Bi 2 o 3 and 1.5wt% Nb 2 o 5 and 0.3wt% SiO 2 After the three kinds of dopants, perform secondary ball milling in the ball mill, the average particle size of the powder after the secondary ball milling is about 0.9-1 micron, and then dry the secondary ball milling material;

[0055] Step 4, adding PVA solution equivalent ...

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Abstract

The invention relates to the technical field of producing electronic ceramic materials, in particular to a CuZn ferrite material and a preparation method thereof; the main crystal phase of the CuZn ferrite material refers to a spinel structure, which comprises a first component and a second component; the first component is composed of, by mass, 48% of Fe2O3, 9% of CuO and 43% of ZnO; the second component is composed of, by weight, 1.25%-1.5% of Bi2O3, 1.5%-2.0% of Nb2O5 and 0.2%-0.4% of SiO2. The CuZn ferrite material has the same spinel crystal structure as the low-temperature sintered NiCuZn ferrite material, the sintering characteristics of the CuZn ferrite material matches NiCuZn ferrite very well, and dielectric loss is low. The CuZn ferrite material is a very good non-magnetic material suitable for matching and co-firing with low temperature sintered NiCuZn ferrite.

Description

technical field [0001] The invention relates to the technical field of producing electronic ceramic materials, in particular to a CuZn ferrite material and a preparation method thereof. Background technique [0002] (Low temperature co-fired ceramics) technology is currently the most mainstream passive packaging and integration technology. Various magnetic devices and modules developed based on LTCC technology have the advantages of small size, low cost, good magnetic shielding performance, high reliability, and easy realization. It has been widely used in mobile communication, computer, automotive electronics, television, radio satellite and other fields. [0003] In recent years, with the continuous improvement of LTCC integration, many application fields require the integration of LTCC magnetic devices with electronic circuits or other non-magnetic modules; for example, in an LTCC power integrated substrate, not only the inductor is required to be packaged in the or tran...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622
CPCC04B35/265C04B35/622C04B2235/3251C04B2235/3272C04B2235/3281C04B2235/3284C04B2235/3298C04B2235/3418C04B2235/602C04B2235/656C04B2235/6562C04B2235/6565C04B2235/6567
Inventor 谢柠帆
Owner 谢柠帆
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