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High-temperature absorbent and preparation method thereof, and ultrathin high-temperature wave-absorbing material and preparation method thereof

A technology of absorbing material and absorbing agent, applied in chemical instruments and methods, other chemical processes, inorganic chemistry, etc., can solve the problems of large thickness and large thickness of absorbing materials.

Active Publication Date: 2020-03-31
XIAN AERONAUTICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a high-temperature absorbent to solve the problem that the thickness of the wave-absorbing material prepared by the existing absorbent is relatively large
[0006] The third purpose of the embodiment of the present invention is to provide an ultra-thin high-temperature absorbing material to solve the problem of large thickness of existing ceramic absorbing materials

Method used

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  • High-temperature absorbent and preparation method thereof, and ultrathin high-temperature wave-absorbing material and preparation method thereof
  • High-temperature absorbent and preparation method thereof, and ultrathin high-temperature wave-absorbing material and preparation method thereof
  • High-temperature absorbent and preparation method thereof, and ultrathin high-temperature wave-absorbing material and preparation method thereof

Examples

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Embodiment 1

[0053] This embodiment proposes an ultra-thin high-temperature wave-absorbing material made of titanium dioxide (TiO 2 ), strontium carbonate (SrCO 3 ), gadolinium oxide (Gd 2 o 3 ) and alumina (Al 2 o 3 ) composition, among them, TiO 2 , SrCO 3 and Al 2 o 3 All are analytically pure, Gd 2 o 3 The purity is greater than or equal to 99.999%.

[0054] This embodiment also proposes a method for preparing the ultra-thin high-temperature wave-absorbing material, the specific process is:

[0055] The first step is to prepare Sr 1-x Gd x TiO 3 Absorbent, where x=0.05:

[0056] (1) Weighing: Weigh TiO according to the stoichiometric ratio of 1:0.95:0.025 2 , SrCO 3 and Gd 2 o 3 .

[0057] (2), ball milling: the weighed TiO 2 , SrCO 3 and Gd 2 o 3 Pour into a stainless steel ball mill jar, and add stainless steel grinding balls, stainless steel grinding balls and TiO 2 and SrCO 3 The ball-to-material ratio of the mixed material is 20:1; add absolute ethanol to ...

Embodiment 2

[0069] This embodiment proposes an ultra-thin high-temperature wave-absorbing material made of titanium dioxide (TiO 2 ), strontium carbonate (SrCO 3 ), gadolinium oxide (Gd 2 o 3 ) and alumina (Al 2 o 3 )composition. Among them, TiO 2 , SrCO 3 and Al 2 o 3 All are analytically pure, Gd 2 o 3 The purity is greater than or equal to 99.999%.

[0070] This embodiment also proposes a method for preparing the ultra-thin high-temperature wave-absorbing material, the specific process is:

[0071] The first step, preparation of Sr 1-x Gd x TiO 3 Absorbent, where x=0.1:

[0072] (1) Weighing: Weigh TiO according to the stoichiometric ratio of 1:0.9:0.05 2 , SrCO 3 and Gd 2 o 3 .

[0073] (2), ball milling: the weighed TiO 2 , SrCO 3 and Gd 2 o 3 Pour into a nylon ball mill jar, and add zirconia balls, zirconia balls and TiO 2 , SrCO 3 and Gd 2 o 3 The ball-to-material ratio of the mixed material is 25:1; add absolute ethanol to submerge the TiO 2 , SrCO 3 ...

Embodiment 3

[0085] This embodiment proposes an ultra-thin high-temperature wave-absorbing material made of titanium dioxide (TiO 2 ), strontium carbonate (SrCO 3 ), gadolinium oxide (Gd 2 o 3 ) and alumina (Al 2 o 3 )composition. Among them, TiO 2 , SrCO 3 and Al 2 o 3 All are analytically pure, Gd 2 o 3 The purity is greater than or equal to 99.999%.

[0086] This embodiment also proposes a method for preparing the ultra-thin high-temperature wave-absorbing material, the specific process is:

[0087] The first step, preparation of Sr 1-x Gd x TiO 3 Absorbent, where x=0.2:

[0088] (1) Weighing: Weigh TiO according to the stoichiometric ratio of 1:0.8:0.1 2 , SrCO 3 and Gd 2 o 3 .

[0089] (2), ball milling: the weighed TiO 2 , SrCO 3 and Gd 2 o 3 Pour into the zirconia ball mill jar, and add zirconia balls, zirconia balls and TiO 2 , SrCO 3 and Gd 2 o 3 The ball-to-material ratio of the mixed material is 30:1; add absolute ethanol to submerge the TiO 2 , SrCO...

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Abstract

The invention discloses a high-temperature absorbent and a preparation method thereof, and an ultrathin high-temperature wave-absorbing material and a preparation method thereof. The preparation method of the high-temperature absorbent comprises the following steps of: weighing TiO2, SrCO3 and Gd2O3 according to a stoichiometric ratio, sequentially carrying out ball milling, drying, grinding and sieving after mixing, heating the materials to a temperature of 1200-1350 DEG C, performing heat preservation treatment for 2-3.5 hours, performing presintering, and carrying out furnace cooling to obtain the absorbent with the molecular formula of Sr1-xGdxTiO3; Al2O3 and the Sr1-xGdxTiO3 absorbent are weighed according to a mass ratio of (1:9)-(4:6), and are mixed to sequentially perform ball milling, drying, grinding and sieving, and the materials are heated to a temperature of 1250-1400 DEG C, high-temperature pressure maintaining treatment is performed for 1.5-3h for vacuum hot pressing sintering, and furnace cooling is performed to prepare the absorbent with the molecular formula of Sr1-xGdxTiO3 / Al2O3, wherein, 0.05<=x<=0.3. The problem that an existing ceramic wave-absorbing materialis large in thickness is solved.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing material preparation, and relates to a high-temperature absorber, an ultra-thin high-temperature wave-absorbing material and a preparation method thereof. Background technique [0002] With the development of electromagnetic technology, weapons and equipment systems, especially large-scale combat weapons, such as fighter planes and missiles, are facing more and more threats. countries attach great importance to. There are two main technical ways to achieve stealth: one is to minimize the radar wave scattering cross-section through shape design, but due to the limitations of tactical technical indicators and environmental conditions, it is quite difficult to achieve an ideal design; the other is to apply wave-absorbing materials. Because it is relatively easy to develop and implement wave-absorbing materials, research on wave-absorbing materials has always been a research "hot spot" in stea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/47C04B35/622C01G23/00C09K3/00
CPCC01G23/003C04B35/47C04B35/622C04B2235/3217C04B2235/3284C09K3/00
Inventor 周影影文琴龙杨超群任朝闻谢辉李兆
Owner XIAN AERONAUTICAL UNIV
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