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Centrifugal forming method for preparing transparent ceramic laser bar

A transparent ceramic and centrifugal molding technology, which is applied in the field of preparation of optically transparent ceramic materials, can solve the problems that affect the final sample transmittance, difficult to remove bubbles, and difficult to remove impurities, so as to reduce the difficulty of preparation, reduce the porosity of the opening, and reduce the optical density. outstanding performance

Active Publication Date: 2015-05-20
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the air bubbles in the gel injection molding slurry are not easy to remove, pores appear in the molded green body, which affects the transmittance of the final sample.
Moreover, the gel injection molding process needs to add a variety of organic additives to the slurry, which also brings certain difficulties to remove impurities from the molded samples.

Method used

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  • Centrifugal forming method for preparing transparent ceramic laser bar
  • Centrifugal forming method for preparing transparent ceramic laser bar
  • Centrifugal forming method for preparing transparent ceramic laser bar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) According to the chemical formula (Y 0.95 Yb 0.05 ) 3 Al 5 o 12 The stoichiometric ratio will be Al 2 o 3 , Y 2 o 3 , Yb 2 o 3 Mix the powders, then add a dispersant with a mass of 2-4% of the mass of the mixed powder and tetraethyl orthosilicate with a mass of 0.3-0.6% of the mass of the mixed powder as a sintering aid, put the above powder into the In a ball milling tank with corundum grinding balls, use absolute ethanol as the dispersion medium for ball milling for 14-18 hours, then place the slurry in an oven to dry, and the dried powder is calcined at 1100°C to obtain a uniformly mixed raw material powder;

[0033] (2) The volume of the slurry to be configured is 30ml, the volume of the raw material powder accounts for 20% of the total volume of the slurry, and the mass of ammonium polyacrylate is 4% of the mass of the powder. After calculation, 27.57g of the raw material powder, 2.2ml of Dispex A40 and Put 22ml of deionized water into a ball mill tan...

Embodiment 2

[0044] (1) According to the chemical formula (Y 0.9 Yb 0.1 ) 3 al 5 o 12 The stoichiometric ratio will be Al 2 o 3 , Y 2 o 3 , Yb 2 o 3 Mix the powders, then add a dispersant with a mass of 2-4% of the mass of the mixed powder and tetraethyl orthosilicate with a mass of 0.3-0.6% of the mass of the mixed powder as a sintering aid, put the above powder into the In a ball milling tank with corundum grinding balls, use absolute ethanol as the dispersion medium for ball milling for 14-18 hours, then place the slurry in an oven to dry, and the dried powder is calcined at 1100°C to obtain a uniformly mixed raw material powder;

[0045] (2) The volume of the slurry to be configured is 30ml, the volume of the raw material powder accounts for 20% of the total volume of the slurry, and the mass of ammonium polyacrylate is 2% of the mass of the powder. After calculation, 28.01g of the raw material powder, 1.1ml of Dispex A40 and Put 23ml of deionized water into a ball mill tank ...

Embodiment 3

[0056] (1) According to the chemical formula (Y 0.98 Yb 0.02 ) 3 al 5 o 12 The stoichiometric ratio will be Al 2 o 3 , Y 2 o 3 , Yb 2 o 3 Mix the powders, then add a dispersant with a mass of 2-4% of the mass of the mixed powder and tetraethyl orthosilicate with a mass of 0.3-0.6% of the mass of the mixed powder as a sintering aid, put the above powder into the In a ball milling tank with corundum grinding balls, use absolute ethanol as the dispersion medium for ball milling for 14-18 hours, then place the slurry in an oven to dry, and the dried powder is calcined at 1100°C to obtain a uniformly mixed raw material powder;

[0057] (2) The volume of the slurry to be configured is 30ml, the volume of the raw material powder accounts for 20% of the total volume of the slurry, and the mass of ammonium polyacrylate is 3% of the mass of the powder. After calculation, 27.54g of the raw material powder, 1.7ml of Dispex A40 and Put 22ml of deionized water into a ball mill jar...

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Abstract

The invention provides a centrifugal forming method for preparing a transparent ceramic laser bar in order to solve the problems in the existing transparent ceramic preparation technique, belonging to the field of an optical transparent ceramic material preparation technique. The method comprises the following steps: mixing Al2O3, Y2O3 and Yb2O3 powders according to the chemical proportioning of (Y[1-x]Ybx)3Al5O12 (0.01<=x<=0.1), preparing a raw material powder by a solid-phase process, mixing the transparent ceramic powder with a dispersing agent and deionized water to prepare a slurry, and carrying out centrifugal forming to obtain a bar-shaped billet; and sufficiently drying the billet, carrying out vacuum sintering at 1700 DEG C for 5-10 hours, and carrying out heat treatment and sanding polishing to obtain the transparent ceramic laser bar. The laser bar obtained by the centrifugal forming method has the advantages of low porosity, favorable uniformity and high density; and the transmittance can reach 70% above within the visible light range, thereby overcoming the defects of nonuniform density distribution, long forming cycle, high porosity and the like in other dry processes and wet processes for forming. The transparent ceramic laser bar can be used as a solid laser operation material, and has favorable application prospects in the field of optical transparent ceramics.

Description

technical field [0001] The invention belongs to the field of preparation technology of optically transparent ceramic materials, in particular to a centrifugal forming method for preparing transparent ceramic laser rods. Background technique [0002] Solid-state lasers have the advantages of large pulse volume, high peak power, compact structure, ruggedness and reliability, so they have very important applications in scientific research, processing, medical treatment and military affairs. The working substance of a solid-state laser is the core of the laser's work and determines the performance of the solid-state device to a large extent. The working substances of solid-state lasers include single crystals, glasses, and transparent ceramics doped with second-phase ions. Compared with single crystals and glasses, transparent ceramics have the advantages of large size, high hardness, good mechanical stability, thermal shock resistance, easy fabrication, and uniform distributio...

Claims

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Application Information

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IPC IPC(8): C04B35/44C04B35/505C04B35/622
Inventor 李晓东赵环宇孙旭东李继光刘绍宏朱琦
Owner NORTHEASTERN UNIV
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