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Method for preparing yttrium aluminum garnet-based transparent ceramic through aqueous tape casting

A technology of water-based tape casting and yttrium aluminum garnet, which is applied in the direction of ceramic layered products, chemical instruments and methods, layered products, etc., can solve the problems of increasing the density of ceramic green bodies, and achieve low cost and environmental compatibility The effect of good sex and simple raw materials

Inactive Publication Date: 2014-01-15
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disclosed method needs to carry out secondary isostatic pressing to the prepared casting film to increase the density of the ceramic green body

Method used

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  • Method for preparing yttrium aluminum garnet-based transparent ceramic through aqueous tape casting
  • Method for preparing yttrium aluminum garnet-based transparent ceramic through aqueous tape casting
  • Method for preparing yttrium aluminum garnet-based transparent ceramic through aqueous tape casting

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preparation example Construction

[0026] Preparation of ceramic slurry

[0027] First follow Y 3 al 5 o 12 The stoichiometric ratio of weighing commercial Al 2 o 3 Powder and Y 2 o 3 powder as raw material. Use water, preferably deionized water as solvent, polyacrylic acid or polymethacrylic acid or triethanolamine as dispersant, and prepare Al by ball milling process 2 o 3 Powder and Y 2 o 3 Slurry of powder mixture. The solid content of the slurry can be 20 vol% to 53 vol%, the amount of the dispersant can be 0.01 to 3.0 wt%, and the ball milling time can be 8 to 24 hours.

[0028]Then polyvinyl alcohol is used as a binder, polyethylene glycol or glycerol is used as a plasticizer, and a ball milling process is used to prepare casting slurry. The amount of polyvinyl alcohol can be 5 wt% to 20 wt%, the amount of polyethylene glycol or glycerin can be 5 wt% to 30 wt%, and the ball milling time is 8 to 24 hours.

[0029] Cast film preparation

[0030] The casting slurry above can be scraped into a ...

Embodiment 1

[0043] Follow Y 3 al 5 o 12 The stoichiometric ratio weighs high-purity commodity Al 2 o 3 Powder 42.4838 g, Y 2 o 3 56.4525 g of powder was added with 21.744 g of deionized water and 0.8 wt% polyacrylic acid as a dispersant, and ball milled and mixed to prepare a slurry, which was ball milled for 24 hours. Then add 10 wt% polyvinyl alcohol as a binder, 15 wt% polyethylene glycol as a plasticizer, continue ball milling and mixing, and prepare casting slurry, and the ball milling time is 24 hours. The homogeneously mixed slurry is moved into the vacuum degassing system and undergoes vacuum treatment to eliminate the air bubbles in the slurry. The degassed slurry was poured into the slurry storage tank on the tape casting machine, the distance between the blades was adjusted to 400 μm, and the cast film was scraped at a rate of 1 cm / s. The cast film was dried at a temperature of 40 °C for 24 hours, and the dried cast film was as follows: figure 1 shown. The dried cast f...

Embodiment 2

[0045] Follow Y 3 al 5 o 12 The stoichiometric ratio weighs high-purity commodity Al 2 o 3 Powder 42.4838 g, Y 2 o 3 56.4525 g of powder was added with 26.576 g of deionized water and 0.7 wt% polymethacrylic acid as a dispersant, and ball milled and mixed to prepare a slurry. The ball milled for 12 hours. Then add 12 wt% polyvinyl alcohol as a binder, 15 wt% glycerol as a plasticizer, continue ball milling and mixing, and prepare casting slurry, and the ball milling time is 12 hours. The homogeneously mixed slurry is moved into the vacuum degassing system and undergoes vacuum treatment to eliminate the air bubbles in the slurry. The degassed slurry was poured into the slurry storage tank on the tape casting machine, the distance between the blades was adjusted to 500 μm, and the cast film was scraped at a rate of 1 cm / s. The cast film was dried at a temperature of 35°C for 24 hours. The dried cast film was cut into 20 mm × 20 mm film, and 40 layers were taken and press...

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Abstract

The invention provides a method for preparing yttrium aluminum garnet-based transparent ceramic through aqueous tape casting. The method comprises steps: preparing a slurry of the yttrium aluminum garnet-based transparent ceramic and a casting film by adopting water as a solvent through adopting an aqueous tape casting technology; processing the casting film to form diaphragms having different shapes as needed; carrying out lamination treatment of the diaphragms at a lamination temperature of 75-95DEG C under a lamination pressure of 40-120MPa to obtain a biscuit; and carrying out degumming treatment and cold isostatic pressing treatment of the biscuit, and sintering to obtain the yttrium aluminum garnet-based transparent ceramic. The method has a good environmental compatibility, and the transparent ceramic can be obtained through the method.

Description

technical field [0001] The invention relates to the field of preparation of optically transparent ceramics, in particular to a method for preparing yttrium aluminum garnet-based transparent ceramics by water-based tape casting. Background technique [0002] In a laser, the laser working substance is the core of the laser, and its physical properties and spectral characteristics determine the performance of the laser to a large extent. Solid-state laser materials are the key to solid-state lasers, including crystals, glasses and ceramics. Laser ceramics are new optical functional ceramic materials with good light transmittance and capable of laser output. Compared with laser crystals, laser ceramics have high doping concentration, good doping uniformity, low synthesis temperature, short preparation cycle, low production cost, strong quality controllability, large size, large degree of shape freedom and multilayer Multifunctional lasers and other advantages; Compared with la...

Claims

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Application Information

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IPC IPC(8): C04B35/44C04B35/622B32B18/00
Inventor 巴学巍李江曾燕萍潘裕柏
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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