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A method of doping to realize the integrated regulation of transition metal oxygen/sulfide magnetoelectricity

A technology of transition metals and oxides, applied in the fields of magnetic/electric field shielding, chemical/physical/physicochemical fixed reactors, electrical components, etc., can solve the problem of demanding precise control of key growth parameters and the preparation process of multi-component materials Complexity and other issues to achieve the effect of overcoming the complexity of the process

Active Publication Date: 2021-06-08
ZHEJIANG UNIV
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  • Description
  • Claims
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Problems solved by technology

Although the combination of magnetic phase and dielectric phase provides a platform to adjust the magnetoelectric parameters of composite materials by adjusting the ratio of magnetic and dielectric components, the preparation process of multicomponent materials is often complicated, and the magnetoelectric parameters are easily affected by composite materials. Influenced by factors such as morphology, magnetic and dielectric phase combination states, the requirements for precise control of key growth parameters are more stringent

Method used

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  • A method of doping to realize the integrated regulation of transition metal oxygen/sulfide magnetoelectricity
  • A method of doping to realize the integrated regulation of transition metal oxygen/sulfide magnetoelectricity
  • A method of doping to realize the integrated regulation of transition metal oxygen/sulfide magnetoelectricity

Examples

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Effect test

Embodiment 1

[0018] Example 1: Fe ion doped MoSe 2 Magnetoelectric integrated control

[0019] (1) Put 10ml of hydrazine hydrate into 100ml of polytetrafluoroethylene reaction liner, then add selenium powder (0.474g) into it, and stir until the selenium powder is completely dissolved.

[0020] (2) Dissolve sodium molybdate dihydrate (0.726g) in a mixed solution of 50ml of absolute ethanol and deionized water (the volume ratio of absolute ethanol and deionized water is 3:2), stir until dihydrate Sodium molybdate was completely dissolved. The solution was poured into a reaction kettle, mixed with hydrazine hydrate, and stirred for 20 minutes.

[0021] (3) According to the doping amount of ferrous ions (the doping amount is based on the molar ratio of the doping element to the metal element in the final product, the same below) 6% and 12% respectively take ferrous chloride and dissolve it in two groups of mixed solution and stirred for 10 minutes.

[0022] (4) React the reactor at 200°C f...

Embodiment 2

[0025] Example 2: Mn ion doped MoS 2 Magnetoelectric integrated control

[0026] (1) Weigh 14.0mmol of sodium molybdate dihydrate and 60.0mmol of H 2 NCSNH 2 Dissolve in deionized water and stir for 30 minutes to mix well.

[0027] (2) According to the doping amount of manganese ions of 2% and 4%, the corresponding manganese sulfate was weighed and dissolved in the mixed solution of two groups of steps (1), and stirred for 30 minutes.

[0028] (3) The reactor was reacted at 220°C for 6 hours, then cooled to room temperature naturally, the samples were collected by centrifugation, and then washed with deionized water and ethanol respectively to obtain a black powder sample, which was placed in a vacuum drying oven Dry at 60°C for 6 hours.

[0029] (4) Mix the obtained sample with paraffin, press it into a ring sample (7.00mm in outer diameter, 3.04mm in inner diameter, and 2.00mm in height), and measure its electromagnetic parameters (ε′, ε ", μ' and μ"). And use the form...

Embodiment 3

[0031] Example 3: Co ion doped WSe 2 Magnetoelectric integrated control

[0032] (1) Weigh 1.32g of sodium tungstate and 0.64g of selenium powder into deionized water, stir for 20 minutes until the raw materials are dissolved and dispersed evenly.

[0033] (2) Add 25ml of HCl and 10ml of hydrazine hydrate solution into the above solution, and stir at room temperature for 2 hours until the solution is evenly mixed.

[0034] (3) Weigh cobalt nitrate hexahydrate according to the doping amount of cobalt ions of 4% and 8%, and place them in the mixed solutions of two groups of steps (2), and stir for 30 minutes to completely dissolve them. The mixed solution was then transferred to a reaction kettle.

[0035] (4) The reaction kettle was reacted at 200°C for 24 hours, then naturally cooled to room temperature, the samples were collected by centrifugation, and then washed with deionized water and ethanol respectively to obtain black powder samples, and the samples were placed in a ...

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Abstract

The invention discloses a method for realizing integrated regulation and control of magnetoelectric parameters of transition metal oxides and chalcogenide compounds by doping, which is used to simultaneously obtain magnetic loss and electrical loss in a single-component material, and improve the absorption and conversion efficiency of electromagnetic waves. The invention induces room temperature magnetism by doping one or more ions of Fe, Co, Ni, Mn and Cr in the transition metal oxide or chalcogenide. The dopant ions also have a good control effect on the dielectric coefficient of the transition metal oxide / sulfide, and then achieve the purpose of material magnetoelectric integration control. This method can introduce the adjustment mechanism of electrical loss and magnetic loss in the single-component material by changing the type and content of dopant atoms, obtain better impedance matching and enhance the electromagnetic wave attenuation characteristics, and has a good application prospect.

Description

technical field [0001] The invention relates to a method for realizing integrated regulation and control of magnetoelectric parameters of transition metal oxides or chalcogenide compounds by doping, which is closely related to the application in the field of electromagnetic wave absorption and conversion. Background technique [0002] With the rapid development of electronic information and the upgrading of communication technology, electromagnetic waves are more and more widely used in daily life. Not only the increasingly complex electromagnetic environment is easy to interfere with the electromagnetic control system and cause equipment failure, but the electromagnetic radiation generated by various electronic equipment can also endanger human physical and mental health. In terms of national defense security, the rapid development of advanced radar detection technology has brought a severe test to the survivability of weapons and equipment. The above challenges not only s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00B01J19/18
CPCB01J19/18H05K9/0081
Inventor 吴琛王晖严密
Owner ZHEJIANG UNIV
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