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A ferrite material with room temperature broadband large magnetocapacitance effect and preparation method thereof

A ferrite material and magnetocapacitance technology, which is applied in the field of ferrite material and its preparation, can solve the problem of small magnetocapacitance effect, and achieve the effect of easy operation and simple preparation method

Active Publication Date: 2021-11-30
SUZHOU UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

(Ni,Mn,Zn)Fe 2 o 4 It has a large magnetocapacitance effect near the low frequency and high frequency resonance point, but the magnetocapacitance effect in other frequency regions is small
Therefore, single-phase materials with large magnetocapacitance effect at room temperature and broadband characteristics have not been reported so far.

Method used

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  • A ferrite material with room temperature broadband large magnetocapacitance effect and preparation method thereof
  • A ferrite material with room temperature broadband large magnetocapacitance effect and preparation method thereof
  • A ferrite material with room temperature broadband large magnetocapacitance effect and preparation method thereof

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Embodiment Construction

[0032] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following examples are intended to illustrate the invention, but not to limit the scope of the invention.

[0033] Ferrite materials of the present invention have the formula: AFe 12-x M x O 19 Wherein A is at least one element of Ba or Sr in the element, the element M is Sc, Mg element or elements at least one of Cr, x is atomic ratio of M content: 0

[0034] Specific method of preparing the ferrite material of the present invention is as follows:

[0035] (1), according to the present invention in high purity BaCO 3 , SRCO 3 , Fe 2 O 3 , SC 2 O 3 , MgO and \ or Cr 2 O 3 Pharmaceutical powder as a raw material (raw material purity of 99.99%), molar ratio of the formula atomic ratio; for example, in x 1.6 = time, molar ratio of each component is BaCO 3 : SrCO 3 : Fe 2 O 3 : Sc 2 O 3 : MgO: Cr 2 O 3 = 80: 20: 520: 78: 3: 1;

[0036] (2), after hand mixing the drug was weighed out, placed into a ball mill jar, and mi...

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Abstract

The invention relates to a ferrite material with room temperature broadband large magnetocapacitance effect and a preparation method thereof. The ferrite material has the molecular formula: AFe 12‑x m x o 19 , wherein A is at least one of Ba element or Sr element, M is at least one of Sc element, Mg element or Cr element, x is the atomic ratio content of M, and 0<x≤4; BaCO 3 , SrCO 3 , Fe 2 o 3 , Sc 2 o 3 , MgO or Cr 2 o 3 The powder medicine is obtained by proportioning, mixing, ball milling, drying, pre-sintering, grinding, pressurizing and sintering according to the atomic molar ratio in the molecular formula of the ferrite material. The ferrite material of the present invention has higher purity, higher resistivity, and all presents remarkable magnetocapacitance effect in the frequency range of 20Hz to 2MHz, and the magnetocapacitance effect still presents certain increasing trend above 2MHz, has made up for The existing single-phase magnetocapacitance materials have the disadvantages of weak magnetocapacitance effect at room temperature and narrow frequency range.

Description

Technical field [0001] The present invention relates to a magnetic material having a capacitive effect, and more particularly to a method for preparing ferrite material having large magnetic rt broadband capacitive effect. Background technique [0002] Magnetic capacitive effect (Magnetocapacitance effect) material is a phenomenon in the external magnetic field, the dielectric constant or capacitance changes. A magnetic material having a capacitive effect may have important applications in the electromagnetic field detector device, smart field controller filters and the like. [0003] A magnetic material having a capacitive effect may be classified into two kinds of single-phase material and a composite material. Single-phase material which was first discovered, but so far, the vast majority of single-phase materials (such as BiMnO 3 Etc.) a magnetic coupling effect can obviously only be much lower than at room temperature (about 100K), requiring far less practical applications. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/26C04B35/40C04B35/622
CPCC04B35/2641C04B35/2683C04B35/622C04B2235/3206C04B2235/3224C04B2235/3241C04B2235/442C04B2235/602C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/96
Inventor 汤如俊周浩杨浩
Owner SUZHOU UNIV
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