Titanium dioxide-coated ferric oxide hollow microsphere composite material and its preparation method and application

A technology of triiron tetroxide and titanium dioxide, which is applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of high density and poor impedance matching characteristics, and achieves a simple preparation process, good electromagnetic wave absorption performance, and easy-to-obtain raw materials. Effect

Active Publication Date: 2022-03-11
SHANDONG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

However, they generally have shortcomings such as high density and poor impedance matching characteristics.

Method used

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  • Titanium dioxide-coated ferric oxide hollow microsphere composite material and its preparation method and application
  • Titanium dioxide-coated ferric oxide hollow microsphere composite material and its preparation method and application
  • Titanium dioxide-coated ferric oxide hollow microsphere composite material and its preparation method and application

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preparation example Construction

[0032] In a second aspect, the present invention provides a method for preparing the titanium dioxide-coated ferric oxide hollow microsphere composite material, comprising the following steps:

[0033] Disperse the hollow microspheres of iron ferric oxide nanometer in absolute ethanol, and disperse evenly to obtain a dispersion liquid;

[0034] Add tetrabutyl titanate dropwise to the dispersion, and mix evenly to obtain a mixed solution;

[0035] Add deionized water to the second container, place the first container containing the mixed solution in the deionized water, separate the mixed solution and the deionized water by the side wall of the first container, and separate the second container as a whole Transfer to the reaction kettle, heat treatment at high temperature, and carry out the reaction to obtain titanium dioxide-coated hollow ferric oxide microsphere composite material.

[0036] In some embodiments, the preparation method of nano ferric oxide comprises the follow...

Embodiment 1

[0056] A preparation method of an electromagnetic wave absorber filled with ferric oxide coated with titanium dioxide, comprising the steps of:

[0057] (1) Dissolve 0.64g of sodium dodecylbenzenesulfonate (SDBS) in 64mL of ethylene glycol, and stir continuously for 30min until a clear and transparent homogeneous solution is obtained.

[0058] (2) 2.16g of ferric chloride hexahydrate and 3.72g of sodium acetate were successively dissolved into the solution in step (1), and stirred continuously for 2 hours until a uniform solution was obtained.

[0059] (3) Transfer all the solution in step (2) to a polytetrafluoroethylene-lined steel reaction kettle, and heat to 180° C. for 24 h. The obtained solid product was centrifuged, washed several times with ethanol / water mixture, and then dried under vacuum at 60° C. for 8 h.

[0060] (4) Take 0.1 g of the sample obtained in step (3), add it into 25 mL of absolute ethanol, ultrasonicate for 5 min, and continuously stir for 30 min unti...

Embodiment 2

[0069] Compared with Example 1, the product obtained in step (7) is mixed with paraffin at a mass ratio of 1:2, and other conditions remain unchanged. After the solid paraffin is melted at a temperature above 75°C, it is stirred quickly and evenly After cooling to room temperature, it is compressed into an absorbent body.

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Abstract

The invention provides a titanium dioxide-coated ferric oxide hollow microsphere composite material and its preparation method and application. The titanium dioxide-coated ferric oxide hollow microsphere composite material has a nano-core-shell structure, and its core is nanometer trioxide Iron hollow microspheres, the shell of which is a titanium dioxide coating layer, the preparation method comprises the following steps: dispersing the hollow microspheres of iron ferric oxide nanometer into an ethanol solution, and dispersing evenly to obtain a dispersion liquid; adding tetratitanate dropwise into the dispersion liquid butyl ester, and mixed evenly to obtain a mixed solution; add deionized water to the second container, place the first container containing the mixed solution in the deionized water, and transfer the second container as a whole to the reaction kettle , high-temperature heat treatment, and reacting to obtain a titanium dioxide-coated hollow ferric oxide microsphere composite material, so that the prepared titanium dioxide-coated ferric oxide composite material has a uniform and controllable morphology.

Description

technical field [0001] The invention belongs to the field of electromagnetic wave absorbing materials, and in particular relates to a titanium dioxide-coated iron ferric oxide hollow microsphere composite material and a preparation method and application thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] In recent years, with the rapid development of modern electronic industry technology, all kinds of electronic and electrical equipment have become more and more popular, but it has also caused serious electromagnetic pollution problems. On the one hand, a large amount of electromagnetic pollution seriously interferes with the normal operation of communication signal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/00
CPCC09K3/00
Inventor 刘久荣孔令欣孔静刘伟汪宙王凤龙吴莉莉
Owner SHANDONG UNIV
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