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Infrared transparent ceramic and preparation method thereof

A technology of infrared-transparent and transparent ceramics, which is applied in the field of preparation of Y2O3-based visible cut-off, transparent ceramics, and infrared-transparent ceramics. It can solve the problems of laser damage in optical systems and urgent laser protection, and achieve the effect of low thermal radiation coefficient.

Active Publication Date: 2017-03-15
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional infrared detectors are susceptible to interference from various heat sources and visible light sources, and special filters need to be added to the irradiation surface; the human eye is most sensitive to blue-green light at 530nm, and the optical systems of various optical devices are also easily damaged by laser light. It is urgent to protect the laser from damage, and the traditional optical glass can only protect one or several wavelengths of laser by doping colored ions or coatings. The reduction of the transmittance of the infrared window in the non-infrared band will inevitably affect the Advantageous laser protection of optical components

Method used

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  • Infrared transparent ceramic and preparation method thereof
  • Infrared transparent ceramic and preparation method thereof
  • Infrared transparent ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1、2、3、4、5

[0023]

[0024] According to (Y 1-x Zr x ) 2 o 3+x The ratio of selected x of the molecular formula, embodiment 1~5 is respectively 0.01,0.025,0.05,0.08,0.10 (doping concentration increases gradually), the atomic percent content x is converted into ZrO 2 and Y 2 o 3 The weight, as shown in the table above, weighs Y with a purity of 99.99% 2 o 3 Micron powder and ZrO 2 Nanoscale powder, ball milled with absolute ethanol for 48 hours, dried at 70°C for 20 hours, sieved with a 200-mesh sieve, calcined at 1000°C for 2 hours, and pressurized by double-sided pressing , the molding pressure is 3MPa, and the size of the compact is The ceramic sheet is formed by cold isostatic pressing under a pressure of 210MPa to obtain a dense green body; the green body obtained in Examples 1-5 is sintered in a vacuum tungsten furnace at a sintering temperature of 1850°C and kept for 5 hours to obtain a brown-black infrared-transmitting ceramic . After double-sided polishing, adopt Lam...

Embodiment 6

[0026] According to (Y 1-x Zr x ) 2 o 3+x The ratio of selected x in the molecular formula is 0.06, and the atomic percentage content x is converted into ZrO 2 and Y 2 o 3 weight, then Y 2 o 3 93.42g, ZrO 2 6.58g, weighing Y with a purity of 99.99% 2 o 3 Micron powder and ZrO 2 Nanoscale powder, 80g of absolute ethanol, ball milled for 36h, dried at 70°C for 30h, sieved with a 200-mesh sieve, calcined at 1000°C for 2h, pressurized on both sides Compression molding, molding pressure 5MPa, the size of the compact is The ceramic sheet is formed by cold isostatic pressing under a pressure of 210MPa to obtain a dense green body; the obtained green body is sintered in a vacuum tungsten furnace at a sintering temperature of 1780-1860°C and kept for 30 hours to obtain a brown-black transparent ceramic. The final colorless and transparent ceramics were tested for UV / visible / near-infrared transmittance and mid-to-far infrared transmittance. The results are as follows figu...

Embodiment 7

[0028] According to (Y 1-x Zr x ) 2 o 3+x The ratio of selected x in the molecular formula is 0.15, and the atomic percentage content x is converted into ZrO 2 and Y 2 o 3 weight, then Y 2 o 3 83.40g, ZrO 2 16.60g, weighing Y with a purity of 99.99% 2 o 3 Micron powder and ZrO 2 Nanoscale powder, 85g of absolute ethanol, ball milled for 36h, dried at 70°C for 25h, sieved with a 200-mesh sieve, calcined at 1100°C for 2h, pressurized by double-sided pressure Forming, the forming pressure is 4MPa, and the size of the compact is The ceramic sheet is formed by cold isostatic pressing under a pressure of 210MPa to obtain a dense green body; the obtained green body is sintered in a vacuum tungsten furnace at a sintering temperature of 1800°C and kept for 10 hours to obtain a brown-black transparent ceramic, which is irradiated by IR-2 The rate measuring instrument measures the radiance in the 3-5μm band, and obtains image 3 The low radiation rate results shown, using t...

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Abstract

The invention discloses infrared-transmitted ceramic and a preparing method thereof. The host of the infrared-transmitted ceramic is Y2O3, and the molecular formula is (Y1-xZrx)2O3+x, wherein x represents the atom percentage composition of Zr replacing Y, and x is larger than or equal to 0.005 but smaller than or equal to 0.18. The prepared Y2O3 host transparent ceramic doped with zirconium is high in permeability, low in high-temperature infrared radiation coefficient and capable of blocking visible light and ultraviolet light and allowing medium-frequency wave infrared light to transmit; the prepared Y2O3 host transparent ceramic doped with the zirconium can be applied to vehicle-mounted forward impedance looking infrareds, night vision investigation, thermal imagers and other civil and military fields. A Z scanning result shows that the infrared-transmitted ceramic has the optical nonlinear absorption character and has potential application value in optoelectronic devices.

Description

technical field [0001] The present invention relates to transparent ceramics, especially a kind of Y doped with Zr 2 o 3 The invention discloses a preparation method of base-visible cut-off and infrared-transmitting ceramics, belonging to the technical field of preparation of special optical functional ceramics. Background technique [0002] With the progress of infrared technology, national defense technology and civilian fields are more widely used in infrared detection, infrared sensing and medical care. Traditional infrared detectors are susceptible to interference from various heat sources and visible light sources, and special filters need to be added to the irradiation surface; the human eye is most sensitive to blue-green light at 530nm, and the optical systems of various optical devices are also easily damaged by laser light. It is urgent to protect the laser from damage, and the traditional optical glass can only protect one or several wavelengths of laser by dop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/505C04B35/622C04B35/63
Inventor 毛小建李晓凯冯明辉姜本学张龙
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI