Preparation method of transparent camouflage material

A stealth material and transparent technology, applied in the field of laser catalytic sintering transparent stealth materials, to achieve high transmittance, high transparency, and dense sintered samples

Pending Publication Date: 2019-10-25
CHONGQING INST OF EAST CHINA NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although zirconia transparent ceramics have been studied for many years, there is still a lack of a low-cost, high-efficiency, suitable for large-scale industrial application preparation methods and corresponding high-quality transparent ceramic products in terms of material performance innovation and material process development.

Method used

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  • Preparation method of transparent camouflage material
  • Preparation method of transparent camouflage material
  • Preparation method of transparent camouflage material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The raw material ZrO 2 Powder, LiF and Yb with a mass fraction of 5% 2 o 3 Powder mixing, wherein the molar ratio of Yb and Zr elements is 1:1, the raw materials are put into a zirconia ball mill tank for ball milling, with ethanol as the ball milling medium, the speed is 400rpm, the ball milling time is 24 hours, and the particle size after high energy ball milling is between 500nm-1μm During the milling process, the mixture after ball milling is granulated to obtain a product with smaller microscopic particle size and high density. The binder with a mass fraction of 8% is added to the uniformly mixed powder in two to three times, ground for 5 hours, sieved, and the mesh number of the sieve is 500 mesh, and the sieved compaction is performed at 500 ° C. 10 hours to remove air bubbles, and grind again after natural cooling. The ground powder is formed by a hydraulic press, and then compacted by isostatic pressing at 100MPa for 3 minutes. After the pressure is release...

Embodiment 2

[0031] The raw material ZrO 2 Powder, LiF and Yb with a mass fraction of 0.5% 2 o 3 Powder mixing, wherein the molar ratio of Yb and Zr elements is 1:1, the raw materials are put into a zirconia ball mill tank for ball milling, with ethanol as the ball milling medium, the speed is 400rpm, the ball milling time is 24 hours, and the particle size after high energy ball milling is between 500nm-1μm During the milling process, the mixture after ball milling is granulated to obtain a product with smaller microscopic particle size and high density. The binder with a mass fraction of 8% is added to the uniformly mixed powder in two to three times, ground for 5 hours, sieved, and the mesh number of the sieve is 500 mesh, and the sieved compaction is performed at 500 ° C. 12 hours to remove air bubbles, and grind again after natural cooling. The ground powder is formed by a hydraulic press, compacted under isostatic pressure at 150MPa, and kept for 5 minutes. After the pressure is r...

Embodiment 3

[0033] The raw material nano ZrO 2 Powder and Nano Yb 2 o 3 Powder mixing, wherein the molar ratio of Yb and Zr elements is 1:1, the raw materials are put into a zirconia ball mill tank for ball milling, with acetone as the ball milling medium, the speed is 400rpm, and the ball milling time is 12 hours. After high-energy ball milling, the particle size is between 50-200nm During the milling process, the mixture after ball milling is granulated to obtain a product with smaller microscopic particle size and high density. The binder with a mass fraction of 7% is added to the uniformly mixed powder in two to three times, ground for 3 hours, sieved, compacted after sieving, and debonded at 500°C for 12 hours to remove air bubbles. After natural cooling, grind again evenly. The ground powder is molded by a hydraulic press at 15MPa, held for 3s, and placed in a copper crucible after pressure relief. Select a semiconductor laser with a laser wavelength of 980nm and a laser power of...

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Abstract

The invention discloses a preparation method of a transparent camouflage material. The preparation method comprises the following steps: S1, adding lithium fluoride and metal oxides into zirconium dioxide, and carrying out ball milling until the average particle size does not exceed 1 mu m to obtain mixed powder; and S2, compacting the mixed powder, and carrying out reactive sintering under the irradiation of laser to obtain the transparent camouflage material. According to the preparation method, zirconia-based transparent ceramic is sintered under laser catalysis, the laser input energy is absorbed by utilizing the sintering activity of the material to catalyze a reaction process, and a sample is synthesized by sintering in a laser-catalyzed high-heat environment, not only is the sintered sample compact and high in transmittivity, but also the preparation method is simple, capable of saving time and materials, clean, pollution-free and suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of laser processing technology and the development of transparent ceramic materials, in particular to a laser catalytic sintering transparent stealth material and a method. Background technique [0002] Ceramic materials are difficult to be as transparent as glass because of the presence of light-absorbing impurities and light-scattering pores inside, but if suitable high-purity raw materials are selected and the pores are removed by technological means, transparent ceramics can be obtained, such as transparent oxides. Ceramics not only have high transmittance in the visible light or near-infrared region, but also have high mechanical strength, high hardness, high temperature resistance, electrical insulation and chemical stability. Transparent ceramics have a wide range of uses. In the mechanical industry, they can be used to manufacture high-hardness, high-temperature-resistant, and corrosion-resistant parts. In the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/50C04B35/48C04B35/64
CPCC04B35/50C04B35/48C04B35/64C04B2235/445C04B2235/3224C04B2235/3225C04B2235/3206C04B2235/3217C04B2235/3251C04B2235/665C04B2235/9653
Inventor 曾和平黄延伟贺嘉杨
Owner CHONGQING INST OF EAST CHINA NORMAL UNIV
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