Novel ferroelectric-ferromagnetic composite material and preparation method thereof

A composite material and ferroelectric technology, which is applied in the field of low temperature sintering to prepare composite materials and ferroelectric-ferromagnetic composite materials, can solve the problems of increased material defects, performance deterioration, and cost increase, and achieves a reduction in magnetic properties and dielectric properties. Losses, high permeability and permittivity, avoiding negative effects

Inactive Publication Date: 2015-10-21
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, a higher sintering temperature will not only increase the energy consumption and cost of material production, but also bring unnecessary side reactions, resulting in the decomposition or loss of active ingredients in the mixed system, increasing material defects and deteriorating properties.
[0003] In recent years, the development of microelectronic devices and integrated devices has put forward higher requirements for the miniaturization and light weight of electronic equipment. The integration of a single active device can no longer meet the production application, and the miniaturization of passive devices has become inevitable.

Method used

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  • Novel ferroelectric-ferromagnetic composite material and preparation method thereof
  • Novel ferroelectric-ferromagnetic composite material and preparation method thereof
  • Novel ferroelectric-ferromagnetic composite material and preparation method thereof

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preparation example Construction

[0020] A preparation method of a novel ferroelectric-ferromagnetic composite material, comprising the following steps:

[0021] Step 1: According to the composition and content of the ferromagnetic phase: iron oxide 65-68wt%, nickelous oxide 7-10wt%, zinc oxide 17-19wt%, copper oxide 6-8wt%, lithium carbonate 0.5-1.5wt%, five The proportion of vanadium oxide is 2-4wt%, weighing and mixing, and then wet ball milling for 10-14 hours to fully mix the raw materials evenly, wherein the ball mill speed is 250-350 rpm, the ball milling medium is ethanol aqueous solution, the concentration 2~6mol / L;

[0022] Step 2: Dry the mixed powder obtained after ball milling in Step 1 at 80-120°C, and then put it into a sintering furnace for pre-firing at a temperature of 800-850°C for 2-4 hours. Cool to room temperature, obtain calcined material;

[0023] Step 3: Add ferroelectric phase ceramics to the calcined material obtained in step 2, mix them, and then place them in a ball mill for dry ...

Embodiment 1

[0027] A preparation method of a novel ferroelectric-ferromagnetic composite material, comprising the following steps:

[0028]Step 1: According to the composition and content of the ferromagnetic phase: 66.2wt% iron oxide, 7.2wt% nickel oxide, 18.1wt% zinc oxide, 6wt% copper oxide, 0.5wt% lithium carbonate, 2wt% vanadium pentoxide , weighing and mixing, and then wet ball milling each raw material in a planetary ball mill for 10 hours to fully mix the raw materials evenly, wherein the ball mill rotating speed is 250 rpm, the ball milling medium is ethanol aqueous solution, and the concentration is 3mol / L;

[0029] Step 2: Dry the mixed powder obtained after ball milling in Step 1 at 90°C, and then put it into a sintering furnace for pre-calcination at a temperature of 800°C for 3 hours. burning material;

[0030] Step 3: Add Bi to the calcined material obtained in Step 2 2 TiO 6 Ferroelectric phase ceramics, mixed, and then placed in a vibrating ball mill for dry grinding f...

Embodiment 2

[0035] A preparation method of a novel ferroelectric-ferromagnetic composite material, comprising the following steps:

[0036] Step 1: According to the composition and content of the ferromagnetic phase: 66.2wt% iron oxide, 7.2wt% nickel oxide, 18.1wt% zinc oxide, 6wt% copper oxide, 0.5wt% lithium carbonate, 2wt% vanadium pentoxide , carrying out weighing and mixing, and then wet ball milling each raw material in a planetary ball mill for 12 hours to fully mix the raw materials evenly, wherein the ball mill rotating speed is 250 rpm, the ball milling medium is ethanol aqueous solution, and the concentration is 3mol / L;

[0037] Step 2: Dry the mixed powder obtained after ball milling in Step 1 at 100°C, and then put it into a sintering furnace for pre-calcination. burning material;

[0038] Step 3: Add Bi to the calcined material obtained in Step 2 2 TiO 6 Ferroelectric phase ceramics, mixed, and then placed in a vibrating ball mill for dry grinding for 0.5h, with an interv...

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Abstract

The invention discloses a novel ferroelectric-ferromagnetic composite material and a preparation method thereof and belongs to the technical field of electronic materials. The novel ferroelectric-ferromagnetic composite material comprises a ferromagnetic phase and a ferroelectric phase, wherein the content of the ferromagnetic phase is 30-99 wt%, and the content of the ferroelectric phase is 1-70 wt%; the ferromagnetic phase is modified NiCuZn ferrite, and the main ingredients and the content of each ingredient comprise 65-68 wt% of ferric oxide, 7-10 wt% of nickel protoxide, 17-19 wt% of zinc oxide, 6-8 wt% of copper oxide, 0.5-1.5 parts of lithium carbonate and 2-4 wt% of vanadium pentoxide; the ferroelectric phase is bismuth-based perovskite ferroelectric ceramics, and the general formula is An-1Bi2BnO3n+3, wherein A is one or two of Bi, Nd, Sm and W, B is one or two of Ti and V, and n is in the range of from one to five. By means of the novel ferroelectric-ferromagnetic composite material and the preparation method thereof, under the condition that no sintering aid is needed to be added, the high densification of the material at a low temperature is achieved, the LTCC technology can be well adapted, and the loss of magnetic property and dielectric property can also be reduced to some extent.

Description

technical field [0001] The invention belongs to the technical field of electronic materials, and in particular relates to a ferroelectric-ferromagnetic composite material and a method for preparing the composite material by low-temperature sintering. Background technique [0002] Ferroelectric-ferromagnetic composite materials are a kind of multiferroic composite materials obtained by combining traditional ferroelectric materials and ferromagnetic materials in different proportions and methods. Because of their excellent magnetic and dielectric properties, they can be It is used to make anti-electromagnetic interference filters and miniature antennas, and can also be used as electromagnetic wave absorbing materials in the field of communication. In the existing composite system, magnesium, nickel or cobalt ferrite is typically used as the ferromagnetic phase material, and BaTiO 3 A two-phase material system obtained by compounding ferroelectric ceramics as ferroelectric pha...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/495C04B35/475C04B35/462C04B35/622
Inventor 李颉张怀武李元勋廖宇龙李强郁国良
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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