Fe-doped CuAlO2 high-temperature wave-absorbing ceramic and preparation method thereof

A high-temperature, ceramic technology, which is applied in the field of Fe-doped CuAlO2 high-temperature microwave-absorbing ceramics and its preparation, can solve the problems of reduced microwave-absorbing performance, high price, and oxidation of carbon materials, and achieve control of investment, good application and promotion, and good industrialization The effect of applying value

Inactive Publication Date: 2020-08-28
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the absence of external coating protection, the general application temperature of carbon absorbing materials is below 400°C, and the increase in temperature will cause the oxidation of carbon materials and reduce the absorbing performance.
Generally, the purpose of increasing the application temperature can be achieved by preparing an anti-oxidation layer on the surface of carbon materials, but the preparation process of such aspects is complicated and expensive

Method used

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  • Fe-doped CuAlO2 high-temperature wave-absorbing ceramic and preparation method thereof
  • Fe-doped CuAlO2 high-temperature wave-absorbing ceramic and preparation method thereof
  • Fe-doped CuAlO2 high-temperature wave-absorbing ceramic and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The purpose of the embodiments of the present invention is to provide a high-temperature wave absorbing ceramic with cheap raw materials and low preparation cost and a preparation method thereof, the chemical formula of which is CuAlO 2 .

[0038] Step 1: Preparation of CuAlO 2 high temperature absorbent

[0039] First, the stoichiometric ratio of 0.5:1 Cu 2 O, Al(OH) 3 The raw materials are thoroughly mixed and uniform, then pre-fired at high temperature and cooled with the furnace.

[0040] CuAlO 2 The preparation method of high temperature absorbent is carried out according to the following steps:

[0041] S1, Weighing: Weigh Cu according to the stoichiometric ratio 2 O, Al(OH) 3 ;

[0042] S2, ball milling: the weighed Cu 2 O, Al(OH) 3 Pour it into a ball mill jar and add grinding balls, deionized water and anhydrous ethanol, and then ball-mill;

[0043] S3, drying: after the ball milling is completed, the absolute ethanol of the mixed slurry in the ball ...

Embodiment 2

[0053] The purpose of the embodiments of the present invention is to provide a high-temperature wave absorbing ceramic with cheap raw materials and low preparation cost and a preparation method thereof, the chemical formula of which is CuAl 0.97 Fe 0.03 O 2 .

[0054] Step 1: Preparation of CuAl 0.97 Fe 0.03 O 2 high temperature absorbent

[0055] First, the Cu with a stoichiometric ratio of 0.5:0.97:0.03 2 O, Al(OH) 3 , Fe(OH) 3 The raw materials are thoroughly mixed and uniform, then pre-fired at high temperature and cooled with the furnace.

[0056] CuAl 0.97 Fe 0.03 O 2 The preparation method of high temperature absorbent is carried out according to the following steps:

[0057] S1, Weighing: Weigh Cu according to the stoichiometric ratio 2 O, Al(OH) 3 and Fe(OH) 3 ;

[0058] S2, ball milling: the weighed Cu 2 O, Al(OH) 3 and Fe(OH) 3 Pour it into a ball mill jar and add grinding balls, deionized water and anhydrous ethanol, and then ball-mill;

[0059]...

Embodiment 3

[0069] The purpose of the embodiments of the present invention is to provide a high-temperature wave absorbing ceramic with cheap raw materials and low preparation cost and a preparation method thereof, the chemical formula of which is CuAl 0.91 Fe 0.09 O 2 .

[0070] Step 1: Preparation of CuAl 0.91 Fe 0.09 O 2 high temperature absorbent

[0071] First, put Cu with a stoichiometric ratio of 0.5:0.91:0.09 2 O, Al(OH) 3 , Fe(OH) 3 The raw materials are thoroughly mixed and uniform, then pre-fired at high temperature and cooled with the furnace.

[0072] CuAl 0.91 Fe 0.09 O 2 The preparation method of high temperature absorbent is carried out according to the following steps:

[0073] S1, Weighing: Weigh Cu according to the stoichiometric ratio 2 O, Al(OH) 3 and Fe(OH) 3 ;

[0074] S2, ball milling: the weighed Cu 2 O, Al(OH) 3 and Fe(OH) 3 Pour it into a ball mill jar and add grinding balls, deionized water and anhydrous ethanol, and then ball-mill;

[0075]...

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Abstract

The invention discloses Fe-doped CuAlO2 high-temperature wave-absorbing ceramic and a preparation method thereof, and belongs to the technical field of wave-absorbing material preparation. According to the preparation method, Fe is used for doping CuAlO2 to change the conductivity and electromagnetic parameters of CuAlO2 and to generate CuAl<1-x>Fe<x>O2 powder with x smaller than or equal to 0.2,and firing is further performed to form the ceramic. By adopting a Cu source substance, an Al source substance and a Fe source substance as reactants, a ball-milling grinding process and a pre-sintering sintering glue discharging process are matched, and finally the Fe-doped CuAlO2 high-temperature wave-absorbing ceramic is prepared. The preparation method is good in process stability, wide in rawmaterial application range and low in cost, and can be popularized to macro production of the material. The Fe-doped CuAlO2 high-temperature wave-absorbing ceramic prepared by the preparation methodhas a chemical formula of CuAl<1-x>Fe<x>O2, wherein x is smaller than or equal to 0.2, and due to introduction of Fe, the CuAl<1-x>Fe<x>O2 ceramic has relatively large dielectric loss, magnetic property and high-temperature resistance, so that the finally prepared Fe-doped CuAlO2 high-temperature wave-absorbing ceramic has high temperature resistance and excellent wave-absorbing property, and canbe widely applied to high-tech industries such as space flight and aviation.

Description

technical field [0001] The invention belongs to the technical field of preparation of wave absorbing materials, and relates to a Fe-doped CuAlO 2 High temperature wave absorbing ceramics and preparation method thereof. Background technique [0002] The study of absorbing materials first started in the military aspect, which is called "stealth material". At present, with the rapid development of information technology today, along with the rapid development of electromagnetic technology such as computers, substations, and wireless communications, the electromagnetic pollution problem brought by it has been paid more and more attention by people. How to prevent and control electromagnetic pollution has become an inevitable major problem in this century. At present, absorbing materials have been widely used in the fields of anti-electromagnetic interference, electromagnetic compatibility, stealth technology and other fields of communication and navigation systems. [0003] Fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/45C04B35/64C04B35/626
CPCC04B35/45C04B35/6261C04B35/64C04B2235/3217C04B2235/3272
Inventor 苏进步李萍王成兵王维科赵霞霖张鹏奎
Owner SHAANXI UNIV OF SCI & TECH
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