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Single-phase multiferroic microwave absorbing material and preparation method thereof

A microwave absorbing material, single-phase technology, applied in the direction of electrical components, magnetic field/electric field shielding, etc., to achieve the effect of wide absorption frequency band, high absorption intensity and short experimental period

Active Publication Date: 2018-09-21
XINYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, studies on the microwave absorption properties of magnetoelectric multiferroic materials have only focused on ferroelectric and antiferromagnetic bismuth ferrite (BiFeO 3 ) material

Method used

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  • Single-phase multiferroic microwave absorbing material and preparation method thereof
  • Single-phase multiferroic microwave absorbing material and preparation method thereof
  • Single-phase multiferroic microwave absorbing material and preparation method thereof

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preparation example Construction

[0032] The embodiment of the present application provides a preparation method of a single-phase multiferroic microwave absorbing material shown in formula (I), the preparation method comprising the following steps:

[0033] (1) Mix n-butyl titanate, bismuth-containing compound, neodymium-containing compound, iron-containing compound, cobalt-containing compound and complexing agent in dilute nitric acid solution according to the stoichiometric ratio to obtain a mixed solution; wherein n-butyl titanate , the molar ratio of titanium, bismuth, neodymium, iron and cobalt in the bismuth-containing compound, neodymium-containing compound, iron-containing compound and cobalt-containing compound is 3:6:1:(3-3x):3x, and x is 0.25-0.3; And the bismuth-containing compound is bismuth nitrate pentahydrate, the neodymium-containing compound is neodymium nitrate hexahydrate, the iron-containing compound is iron nitrate nonahydrate, the cobalt-containing compound is cobalt nitrate hexahydrate,...

specific Embodiment 1

[0041] Follow the steps below to prepare NdBi 6 Ti 3 (Fe 1-x co x ) 3 o 21 (x=0.25) Single-phase multiferroic microwave absorbing materials.

[0042] Step 1: Weigh (0.05 / 7) mol sample raw material according to Nd:Bi:Ti:Fe:Co stoichiometric ratio 1:6:3:2.25:0.75, namely take 7.442g n-butyl titanate (purity is 98 %), 2.163g neodymium nitrate hexahydrate (purity is 99%), 20.998g bismuth nitrate pentahydrate (purity is 99%), 6.592g ferric nitrate nonahydrate (purity is 98.5%), 1.575g cobalt nitrate hexahydrate (purity 98.5%) dissolved in nitric acid solution (take 20mL from the nitric acid solution with a concentration of 65-68%, add it to a beaker of about 500mL distilled water, then add 100ml distilled water), add ethylenediaminetetraacetic acid (EDTA) with a purity of 98% ) 18.616g and purity are 98% citric acid 19.123g as complexing agent, obtain mixed solution after stirring.

[0043] Step 2: adjust the pH value of the mixed solution to neutral with ammonia water, stir...

specific Embodiment 2

[0049] Follow the steps below to prepare NdBi 6 Ti 3 (Fe 1-x co x ) 3 o 21 (x=0.3) Single-phase multiferroic microwave absorbing materials.

[0050] Step 1: Weigh (0.05 / 7) mol sample raw materials according to Nd:Bi:Ti:Fe:Co stoichiometric ratio 1:6:3:2.1:0.9, that is, weigh 7.442g n-butyl titanate (purity is 98 %), 2.163g neodymium nitrate hexahydrate (purity is 99%), 20.998g bismuth nitrate pentahydrate (purity is 99%), 6.153g ferric nitrate nonahydrate (purity is 98.5%), 1.899g cobalt nitrate hexahydrate (purity 98.5%) dissolved in nitric acid solution (take 20mL from the nitric acid solution with a concentration of 65-68%, add it to a beaker of about 500mL distilled water, then add 100ml distilled water), add ethylenediaminetetraacetic acid (EDTA) with a purity of 98% ) 18.616g and purity are 98% citric acid 19.123g as complexing agent, obtain mixed solution after stirring.

[0051] Step 2: adjust the pH value of the mixed solution to neutral with ammonia water, sti...

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Abstract

The invention discloses a single-phase multiferroic microwave absorbing material NdBi6Ti3 (Fe1-xCox) 3O21(x=0.25-0.3) and a preparation method thereof. Because of the symbiotic structure of layered perovskite and the chemical modification of neodymium, the microwave absorbing material exhibits excellent multiferrous properties due to the interaction between ferrite octahedron and cobalt-oxygen octahedron. Based on these physical characteristics, the material exhibits good microwave absorbing property in the microwave range of 2-18GHz, has high absorption intensity and wide absorption band, andis far superior to the microwave absorption performance of the partial carbon / ferrite composite material; and the preparation method has the advantages of simple operation, short experiment period, favorable for large-scale production and wide application prospect.

Description

technical field [0001] The invention relates to a microwave absorbing material and a preparation method thereof, in particular to a multiferroic microwave absorbing material with a single-phase layered perovskite symbiotic structure and a preparation method thereof, belonging to the technical field of functional materials. Background technique [0002] With the development of the electronics industry, issues such as electromagnetic interference, information security, and personnel safety have become more and more prominent. Among them, electromagnetic interference shielding and microwave absorption have attracted the attention of scientists because of their novel physical properties and potential commercial value. Ideal microwave absorbing materials usually require good thermal stability, oxidation resistance, low density, wide absorption band and high absorption strength. The most widely studied materials in this field are magnetic ferrite system materials, because such mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/40C04B35/622H05K9/00
CPCC04B35/2608C04B35/2666C04B35/2675C04B35/622C04B2235/3232C04B2235/3275C04B2235/3298C04B2235/656C04B2235/6585C04B2235/768C04B2235/96H05K9/0081
Inventor 孙书杰王文燕张林田永尚肖振宇李彦磊赵志强程念房良訾威孙柱柱
Owner XINYANG NORMAL UNIVERSITY
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