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Yttrium oxide-based laser ceramics with core-shell structure and preparation method thereof

A technology of core-shell structure and laser ceramics, which is applied in the field of material science, can solve problems such as errors and losses, and achieve good sintering activity.

Inactive Publication Date: 2017-05-17
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the strong directionality of the laser, any small refraction will cause light refraction and cause errors and losses

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: (Y 0.995 Ce 0.005 ) 2 o 3 -0.01(Y 0.95 La 0.05 ) 2 o 3 (x=0.005, y=0.05, M=Ce, N=La)

[0026] Weigh 0.995 mol of yttrium nitrate and 0.005 mol of cerium nitrate into deionized water and mix evenly, then use zirconia balls as the grinding medium, ball mill and mix for 4 hours, dry and then calcined at 1550 °C for 2 hours to obtain (Y,Ce ) 2 o 3 phase powder. Weigh 0.0095 mol of yttrium nitrate and 0.0005 mol of lanthanum nitrate into deionized water and mix evenly, then add the above synthesized (Y, Ce) 2 o 3 phase powder, ball milled for 4 hours, and then the mixture was spray-dried to remove deionized water. Put the powder obtained after spray drying into a mold, shape it under a pressure of 10 MPa, then heat it up to 1050 °C for 4 hours, put it into an isostatic press after cooling, and perform isostatic pressing at 300 MPa; The product after isostatic pressing is placed in a vacuum furnace, kept at 1750°C for 4 hours, cooled and then anneal...

Embodiment 2

[0027] Embodiment 2: (Y 0.85 PR 0.15 ) 2 o 3 -0.2(Y 0.88 La 0.09 Zr 0.03 ) 2 o 3 (x=0.15, y=0.12, M=Pr, N=La, Zr)

[0028] Weigh 0.425 mol of yttrium oxide and 0.075 mol of praseodymium oxide into deionized water and mix evenly, then use zirconia balls as the grinding medium, ball mill and mix for 24 hours, dry and then calcined at 1250 °C for 8 hours to obtain (Y,Pr ) 2 o 3 phase powder. Weigh 0.176 mol of yttrium nitrate, 0.018 mol of lanthanum nitrate, and 0.006 mol of zirconium nitrate into deionized water and mix evenly, then use zirconia balls as the grinding medium, ball mill and mix for 24 hours, dry and then calcinate at 1050 °C for 1 hour , get (Y,La,Zr) 2 o 3 phase powder. The above-prepared (Y, Pr) 2 o 3 Phase powder and (Y, La, Zr) 2 o 3 Mix the phase powders, put them into a ball mill jar, use zirconia balls as the grinding medium, and ball mill and mix for 24 hours to obtain a mixed powder; the above mixed powder is dried and then pressed into ...

Embodiment 3

[0029] Embodiment 3: (Y 0.9 Dy 0.1 ) 2 o 3 -0.1(Y 0.8 La 0.1 Ti 0.05 Al 0.05 ) 2 o 3 (x=0.1, y=0.2, M=Dy, N=La, Ti, Al)

[0030] Weigh 0.3 mol of yttrium oxide, 0.15 mol of yttrium nitrate, 0.15 mol of yttrium acetate, and 0.1 mol of dysprosium acetate into deionized water and mix evenly, then use zirconia balls as the grinding medium, ball mill and mix for 12 hours, and then dry Calcined at 1500 °C for 6 hours to obtain (Y,Dy) 2 o 3 phase powder. Weigh 0.04 mol of yttrium nitrate, 0.04 mol of yttrium acetate, 0.01 mol of lanthanum acetate, 0.005 mol of tetrabutyl titanate, and 0.005 mol of aluminum nitrate into deionized water and mix well, then add the above synthesized (Y, Dy) 2 o 3 phase powder, ball milled for 12 hours, and then the mixture was spray-dried to remove deionized water. Put the powder obtained after spray drying into a mold, shape it under a pressure of 20 MPa, then heat it up to 1250 °C for 2 hours, put it into an isostatic press after cooling...

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PUM

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Abstract

The invention discloses yttrium oxide-based laser ceramics with a core-shell structure and a preparation method thereof, a core-layer of a crystalline grain of the laser ceramics is (Y, M) 2O3 phase, a shell-layer is (Y, N) 2O3 phase, wherein the M is a rare earth luminescent ion, and the N is a sintering assistant. The preparation process is as follows: first, mixing a yttrium compound with an M compound, calcining to obtain (Y, M) 2O3 powder, then mixing the yttrium compound with an N compound, calcining to obtain (Y, N) 2O3 powder, afterwards, mixing the two powder; or mixing the yttrium compound with the N compound and adding the (Y, M) 2O3 powder directly into the mixture to be mixed and calcined; performing isostatic pressure molding and vacuum sintering on the obtained mixed powder, then annealing after cooling. The preparation process provided by the invention is simple and controllable, a (Y, N) 2O3 thin layer with excellent sintering property is used to coat the (Y, M)2O3 phase, which can reduce crystal lattice distortion on the basis of ceramic sintering property improvement, thus obtaining excellent laser property.

Description

technical field [0001] The invention relates to a yttrium oxide-based laser ceramic and a preparation method thereof, in particular to a yttrium oxide-based laser ceramic with a core-shell structure and a preparation method thereof, belonging to the field of material science and technology. Background technique [0002] Yttrium oxide is a cubic crystal with excellent light transmission properties, and has the advantages of high melting point, good chemical and photochemical stability, high thermal conductivity, and wide range of optical transparency (0.23-8.0 μm), especially in the infrared region, with a theoretical transmittance of more than 80%; its phonon energy is low, and it is easy to realize the doping modification of rare earth ions, which can suppress the non-radiative transition to a certain extent, increase the probability of radiative transition, and thereby improve the quantum efficiency of luminescence. As an important matrix material for solid-state laser die...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/505C04B35/622C04B35/626C04B35/628C04B35/64
CPCC04B35/505C04B35/622C04B35/6261C04B35/62645C04B35/62802C04B35/64C04B2235/3217C04B2235/3227C04B2235/3229C04B2235/3232C04B2235/3244C04B2235/9653
Inventor 王焕平田颖杨清华徐时清雷若姗肖珍
Owner CHINA JILIANG UNIV
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