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Lanthanum-zirconium codoped rare-earth sesquioxide transparent ceramic and preparation method thereof

A technology of sesquioxide and transparent ceramics, which is applied in the field of lanthanum-zirconium co-doped rare earth sesquioxide transparent ceramics and its preparation, and can solve problems such as questioning the practical effect of sintering aids, affecting the performance of transparent ceramics, and affecting the laser performance of ceramics. , to achieve the effect of inhibiting the excessive growth of grains, reducing the driving force of sintering, and promoting the discharge of pores

Inactive Publication Date: 2011-08-31
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

As proposed in U.S. Patent 6,825,144 of the above-mentioned Hideki et al. application, use a very small amount of Al 2 o 3 Sesquioxides with good transparency can be obtained as a sintering aid, but the practical effect of the sintering aid has been questioned; U.S. Patent 4115134 and the Chinese patent with publication number CN101148357A propose to use La 2 o 3 As a sintering aid, yttrium oxide matrix ceramics with good transparency can be obtained. The ceramics have extremely low porosity and high transmittance, but the crystal grains are too large and the particle size distribution is uneven, which affects the laser performance of the ceramics; the publication number is Propose to adopt ZrO in the Chinese patent of CN101665356A 2 As a sintering aid, through Zr 4+ The method of ion suppression sintering controls the grain growth, and can obtain transparent ceramics with high transmittance, moderate grain size and uniform distribution, but there are pores in the microstructure that cannot be completely eliminated, which affect the performance of transparent ceramics

Method used

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  • Lanthanum-zirconium codoped rare-earth sesquioxide transparent ceramic and preparation method thereof
  • Lanthanum-zirconium codoped rare-earth sesquioxide transparent ceramic and preparation method thereof
  • Lanthanum-zirconium codoped rare-earth sesquioxide transparent ceramic and preparation method thereof

Examples

Experimental program
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Effect test

no. 1 example

[0023] Choose R to be the Y element, and Ln is the Nd element, and the molecular formula of the transparent ceramic of the present embodiment is Y (2-2X-2Y-2Z) La 2x Zr 2y Nd 2z o 3 , where x=0.01, select the values ​​of z and y in the range of 0≤z≤0.1, 0.001≤y≤0.06, and use Y with a purity greater than 99.9% 2 o 3 , La 2 o 3 , ZrO 2 、Nd 2 o 3 Powder as raw material, according to molecular formula Y (2-2X-2Y-2Z) La 2x Zr 2y Nd 2z o3 Weigh the ingredients, use absolute ethanol as the ball milling medium, polyethylene glycol 400 as the dispersant, ball mill for 24 hours (hereinafter expressed by h), place in a drying oven to dry for 24 hours, grind, sieve, and put into a muffle furnace Calcinate at 650°C for 2 hours, sieve again, press 250MPa cold isostatic pressure into a green sheet, take it out, put it in a vacuum furnace, raise it to 1700-1950°C, and keep it for 15 hours to obtain the required transparent ceramics. Specific implementation methods can refer to t...

no. 2 example

[0027] Compared with the first embodiment group, the difference between the implementation process is that Ln is selected as a combination of Yb and Ho, and, in terms of molar ratio, the doping amount of Yb is 2.5at%, and the doping amount of Ho is 2.5at%. (ie z=0.025+0.025=0.05). Specific implementation methods can refer to the following table:

[0028]

[0029]

[0030] Using the above preparation process, if R selects any element from Y, Lu, Sc, Gd, and Ln selects any combination of any two elements from Nd, Tm, Ho, Er, Yb, Tb, and Pr, transparency can be obtained high ceramic.

no. 3 example

[0032] Compared with the first embodiment group, the difference between the implementation process is that Ln is selected as a combination of Yb, Tm, and Ho, and, in terms of molar ratio, the doping amount of Yb is 1 at%, and the doping amount of Tm is 1 at%. The amount of Ho is 2at%, and the doping amount of Ho is 2at% (ie, z=0.01+0.02+0.02=0.05). The specific real-time mode can refer to the following table:

[0033]

[0034] Using the above preparation process, if R selects any element of Y, Lu, Sc, and Gd, and Ln selects a combination of any three elements of Nd, Tm, Ho, Er, Yb, Tb, and Pr, transparency can be obtained high ceramic.

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Abstract

The invention discloses lanthanum-zirconium codoped rare-earth sesquioxide transparent ceramic and a preparation method thereof. The chemical formula of the lanthanum-zirconium codoped rare-earth sesquioxide transparent ceramic is R(2-2X-2Y-2Z)La2xZr2yLn2zO3, wherein x is more than or equal to 0.01 and less than or equal to 0.2; y is more than or equal to 0.001 and less than or equal to 0.06; z is more than or equal to 0 and less than or equal to 0.1; R refers to one of rare-earth elements such as Y, Lu, Sc and Gd which are usually taken as doping substrates; and Ln refers to one or the combination of a plurality of lanthanum-series elements such as Nd, Tm, Ho, Er, Yb, Tb and Pr which are usually taken as activated ions. Due to the adoption of lanthanum-zirconium codoping in the method for preparing transparent ceramic with a lanthanum-zirconium codoping method, the growth of crystal grains is suppressed to a certain degree while sintering is facilitated, and transparent ceramic with fine crystal grains, a single size and low porosity is finally obtained.

Description

technical field [0001] The invention relates to special optical functional ceramics, in particular to a lanthanum-zirconium co-doped rare earth sesquioxide transparent ceramic and a preparation method thereof. Background technique [0002] Sesquioxide materials of rare earth elements such as Y, Lu, Sc, Gd, etc. have excellent mechanical properties, high chemical stability, high thermal conductivity, low phonon energy, wide transmission spectrum, and optical properties. Isotropy has always been considered as a new type of laser working medium material, infrared window material and arc discharge lamp material with great potential. Especially when used as a laser working medium, its low phonon energy and high thermal conductivity can greatly improve the working stability and quantum efficiency of the laser. However, these oxides have high melting points, and some are prone to high-temperature phase transformation, so high-quality single crystals cannot be obtained by tradition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/50C04B35/505C04B35/622
Inventor 易庆周圣明林辉侯肖瑞滕浩
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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