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A kind of multi-band laser protection transparent ceramic material and preparation method thereof

A technology for transparent ceramics and laser protection, applied in multi-band laser protection transparent ceramic materials and their preparation, in the field of high-energy blinding laser protection, can solve the problems of poor chemical stability, limited use range, difficult to control dispersion, etc. Simple process, overcoming the problem of component segregation, and good uniformity

Active Publication Date: 2017-03-01
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these materials can form a good absorption of laser light, these protective materials are mostly aimed at the protection of a specific wavelength of laser light, which limits their scope of use; at the same time, these materials have poor physical and chemical stability at high temperatures, and are prone to aging. High-energy laser irradiation is prone to structural damage and permanent failure
In addition, it is difficult to control the dispersion of organic dyes and semiconductor powders in plastics, glass materials are prone to component segregation during the preparation process, and it is difficult to construct composite protective materials

Method used

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  • A kind of multi-band laser protection transparent ceramic material and preparation method thereof
  • A kind of multi-band laser protection transparent ceramic material and preparation method thereof
  • A kind of multi-band laser protection transparent ceramic material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0025] A kind of anti-laser material of the present invention, according to Dy 3 Al 5 o 12 The general chemical formula, accurately weigh α-Al 2 o 3 12.2352g, Dy 2 o 3 26.8560g, and add 0.0390g of MgO powder and 0.1955g of high-purity TEOS reagent as composite sintering aids, and use a planetary mill for thorough mixing. The ball-milled slurry was dried in a constant temperature oven at 60° C. for 24 hours, then ground and passed through a 200-mesh sieve. Weigh 7.5 g of the ground ceramic powder, and perform cold isostatic pressing after pre-pressing at a pressure of 300 MPa to obtain a dense green body. The green body is sintered by vacuum reaction technology, heated to 1840 ° C, kept for 10 hours, and the vacuum degree is 10 -3 Pa. After cooling with the furnace, it is annealed in an annealing furnace at 1540 ° C for 10 hours. After double-sided polishing, high-quality transparent ceramics are obtained. The transparent ceramic has an absorption rate of more than 99...

Embodiment 2

[0027] A kind of dual-band laser protective transparent ceramic material of the present invention, according to (Er 0.5 Dy 0.5 ) 3 Al 5 o 12 The general chemical formula, accurately weigh α-Al 2 o 3 3.5686g, Dy 2 o 3 3.9165g, Er 2 o 3 4.0165g, and add 0.0035g MgO powder and 0.0920g high-purity TEOS reagent as a composite sintering aid, and use a planetary mill to fully mix after blending. The ball-milled slurry was dried in a constant temperature oven at 60° C. for 24 hours, then ground and passed through a 200-mesh sieve. Weigh 2 g of the ground ceramic powder, and perform cold isostatic pressing after pre-pressing at a pressure of 150 MPa to obtain a dense green body. The green body is sintered by vacuum reaction technology, heated to 1780 ° C, kept for 6 hours, and the vacuum degree is 10 -4 Pa. After cooling with the furnace, it was annealed in a 1450°C annealing furnace for 4 hours. After double-sided polishing, high-quality transparent ceramics are obtained....

Embodiment 3

[0029] A kind of dual-band laser protective transparent ceramic material of the present invention, according to (Er 0.995 Dy 0.005 ) 3 Al 5 o 12 The general chemical formula, accurately weigh α-Al 2 o 3 10.1960g, Er 2 o 3 22.8364g, Dy 2 o3 0.1119g, and add 0.0165g MgO powder and 0.1988g high-purity TEOS reagent as a composite sintering aid, and use a planetary mill to fully mix after blending. The ball-milled slurry was dried in a constant temperature oven at 60° C. for 24 hours, then ground and passed through a 200-mesh sieve. Weigh 4 g of the ground ceramic powder, pre-press and then perform cold isostatic pressing at a pressure of 200 MPa to obtain a dense green body. The green body is sintered by vacuum reaction technology, heated to 1720 ° C, kept for 12 hours, and the vacuum degree is 10 -4 Pa. After cooling with the furnace, it was annealed in a 1400°C annealing furnace for 5 hours. After double-sided polishing, high-quality transparent ceramics are obtained...

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Abstract

The invention provides a multiband laser protection transparent ceramic material and a preparation method thereof. The multiband laser protection transparent ceramic material has an expression formula of (Er1-xDyx)3Al5O12, wherein x is greater than or equal to 0.005 and less than or equal to 1. The multiband laser protection transparent ceramic material is prepared by vacuum solid phase sintering. Through adjustment of a value of x in the expression formula of (Er1-xDyx)3Al5O12, the multiband laser-prevention transparent ceramic material has special absorption capabilities at wavelengths of 525-540nm, 808nm, 880-920nm, 970nm and 1064nm, and satisfies people and equipment requirements on laser protection wavelength.

Description

technical field [0001] The invention relates to a multi-band laser protective transparent ceramic material and a preparation method thereof, which can absorb lasers of different wavelengths in the ultraviolet, visible light and near-infrared regions, and is mainly used in the field of laser protection, especially for the protection of high-energy blinding lasers. Background technique [0002] Satellites, spacecraft, space stations, etc. often become the targets of attack in the mode of modern warfare without gunpowder. When it is attacked by laser weapons, if it is not effectively protected, it will lead to unstable working performance and even damage to the equipment. In the existing laser protection technology, most of the protection materials including glass, phase change film and organic dyes are used. Although these materials can form a good absorption of laser light, these protective materials are mostly aimed at the protection of a specific wavelength of laser light,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/44C04B35/50C04B35/622
Inventor 陆春华胡松倪亚茹许仲梓周国红王士维
Owner NANJING TECH UNIV
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