Method for preparing yttrium aluminum garnet based transparent ceramic by slip casting

A technology of yttrium aluminum garnet and grouting molding, which is applied in the field of preparing yttrium aluminum garnet-based transparent ceramics by grouting molding, can solve the problems of difficult realization, large size, complex shape and composite structure, and achieves a widening of preparation methods. Effect

Active Publication Date: 2011-05-18
中国科学院上海硅酸盐研究所苏州研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Materials used in high-end laser weapons and in special environments often need to have the characteristics of large size, complex shape and composite structure, which are difficult to achieve by conventional dry pressing

Method used

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  • Method for preparing yttrium aluminum garnet based transparent ceramic by slip casting
  • Method for preparing yttrium aluminum garnet based transparent ceramic by slip casting
  • Method for preparing yttrium aluminum garnet based transparent ceramic by slip casting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 25.4904g of α-Al with an average particle size of 300nm 2 o 3 Powder, 33.8715g Y with an average particle size of 3μm 2 o 3 Powder, 0.3562g tetraethyl orthosilicate (TEOS) and 0.0594g herring oil (MFO) are put into high-purity alumina ball mill jar, add 200g high-purity alumina balls, 34ml absolute ethanol, and then ball mill and mix for 8 hours After adding 0.1188g of polyvinyl butyral (PVB), 0.1782g of polyethylene glycol (PEG) and 0.1484g of polyether-modified silicone, ball milling was continued for 2 hours to obtain a ceramic slurry for slip casting. Slurry molding was performed on the prepared slurry. After the grouting, the green body was dried at 30° C. for 24 hours, then at 70° C. for 12 hours, and peeled off from the mold to obtain a ceramic green body with a thickness of about 4 mm. The prepared ceramic green body is pre-fired in a muffle furnace: the heating rate is 5°C / min, the pre-fire temperature is 600°C, and the holding time is 4h, so as to eliminate...

Embodiment 2

[0036] 25.4904g of α-Al with an average particle size of 300nm 2 o 3 Powder, 33.1955g Y with an average particle size of 3μm 2 o 3 Powder, 0.5047g of Nd with an average particle size of 250nm 2 o 3 Powder, 0.3582g tetraethyl orthosilicate (TEOS) and 0.0895g herring oil (MFO) are put into a high-purity alumina ball mill jar, add 200g high-purity alumina balls, 36ml absolute ethanol, and then ball mill and mix for 10 hours After adding 0.2985g polyvinyl butyral (PVB), 0.1194g butyl benzyl phthalate (BBP) and 0.0597g ​​polyether-modified silicone, ball milling was continued for 2 hours to obtain a ceramic slurry for slip casting. Slurry molding was performed on the prepared slurry, and the green body after grouting was dried at 25° C. for 24 hours, then dried at 80° C. for 10 hours, and peeled off from the mold to obtain a ceramic green body with a thickness of about 4 mm. The prepared ceramic green body was pre-fired in a muffle furnace: the heating rate was 2.5 °C / min, the...

Embodiment 3

[0038] 25.4903g ​​of α-Al with an average particle size of 300nm 2 o 3 Powder, 33.5328g Y with an average particle size of 3μm 2 o 3 Powder, 0.5047g Er with an average particle size of 7μm 2 o 3 Powder, 0.4800g tetraethyl orthosilicate (TEOS) and 0.1188g polyacrylic acid (PAA) are put into high-purity alumina ball mill jar, add high-purity alumina ball 180g, absolute ethanol 30ml, after ball milling and mixing for 10h, After adding 0.0594g of polyvinyl butyral (PVB), 0.0594g of butyl benzyl phthalate (BBP) and 0.0297g of polyether-modified silicone, ball milling was continued for 2 hours to obtain a ceramic slurry for slip casting. Slurry molding was performed on the prepared slurry, and the green body after the slurry injection was dried at 25° C. for 24 hours, and peeled off from the mold to obtain a ceramic green body with a thickness of about 3 mm. The prepared ceramic green body was pre-fired in a muffle furnace: the heating rate was 2.5°C / min, the pre-fire temperatu...

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Abstract

The invention discloses a method for preparing a yttrium aluminum garnet (YAG) based transparent ceramic by slip casting. The method comprises the following steps: performing ball-milling and mixing on oxide ceramic powder, a sintering adjuvant, a nonaqueous solvent and a dispersant; adding an adhesive, a plasticizer and a defoaming agent; and preparing a nonaqueous based slurry through ball-milling and mixing, wherein the slurry consists of the following components in percentage by mass: 40 to 70 percent of oxide ceramic powder, 0.01 to 1 percent of sintering adjuvant, 0.005 to 2.5 percent of dispersant, 0.01 to 5 percent of adhesive, 0.01 to 3 percent of plasticizer, 0.005 to 0.5 percent of defoaming agent, and the balance of the nonaqueous solvent; and preparing a ceramic block from the slurry through slip casting, preparing a ceramic biscuit by adopting a two-step drying method, and preparing the transparent ceramic through vacuum sintering. The method adopts the slip casting, is particularly suitable for preparing the ceramic sample with complicated shape, large size and composite structure, and greatly widens the preparation means of the transparent ceramic.

Description

technical field [0001] The invention relates to the technical field of preparation of transparent ceramics, in particular to a new method for preparing yttrium aluminum garnet (YAG)-based transparent ceramics by slip casting. Background technique [0002] Neodymium-doped yttrium-aluminum garnet (Nd:YAG) single crystal is currently the laser host material with the best performance, the largest output, and the widest application. However, the inherent characteristics of single crystal growth technology limit its performance and application range. Material scientists have tried to use transparent ceramics as the working substance of solid-state lasers since the 1960s, but the results were not satisfactory. Until the publication of patents JP05-286761, JP05-286762, JP05-294722, JP05-294723, JP05-294724, JP05-235462, etc., the ceramic laser working material represented by Nd:YAG transparent ceramics is due to its excellent preparation technology and material properties. The unpa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/44C04B35/50
Inventor 李江周军潘裕柏刘文斌张文馨王亮姜本学石云寇华敏郭景坤
Owner 中国科学院上海硅酸盐研究所苏州研究院
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