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A kind of high-temperature absorbent, ultra-thin high-temperature wave-absorbing material and preparation method thereof

A technology of microwave-absorbing materials and absorbents, applied in chemical instruments and methods, other chemical processes, titanium compounds, etc., can solve the problems of large thickness and large thickness of microwave-absorbing materials, and achieve temperature-resistant and microwave-absorbing properties and excellent microwave-absorbing properties Good performance and process stability

Active Publication Date: 2021-09-21
XIAN AERONAUTICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of high-temperature absorbent, ultra-thin high-temperature wave-absorbing material and preparation method thereof
  • A kind of high-temperature absorbent, ultra-thin high-temperature wave-absorbing material and preparation method thereof
  • A kind of high-temperature absorbent, ultra-thin high-temperature wave-absorbing material and preparation method thereof

Examples

Experimental program
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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, an ultra-thin high-temperature wave-absorbing material and a preparation method thereof. First, TiO is weighed according to the stoichiometric ratio 2 , SrCO 3 and Gd 2 o 3 After mixing, ball milling, drying, grinding and sieving are carried out in sequence, and the material is heated to 1200-1350 °C for 2-3.5 hours, pre-calcined and cooled with the furnace, and the molecular formula is Sr 1‑x Gd x TiO 3 absorbent. Then weigh Al according to the mass ratio of (1:9)~(4:6) 2 o 3 and Sr 1‑x Gd x TiO 3 Absorbent, after mixing, ball milling, drying, grinding, and sieving are carried out in sequence, and the material is heated to 1250-1400°C for 1.5-3 hours of high-temperature and pressure-holding treatment for 1.5-3 hours to carry out vacuum hot-pressing sintering, and the molecular formula is obtained after cooling in the furnace. 1‑ x Gd x TiO 3 / Al 2 o 3 , where 0.05≤x≤0.3. The problem of large thickness of the existing ceramic wave-absorbing material 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 Patents(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