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Preparation method of yttria-base transparent ceramics with designable component and structure

A technology of transparent ceramics and yttrium oxide is applied in the field of preparation of yttrium oxide-based transparent ceramics, and can solve the problems of flammability, harm, difficulty in preparing complex shapes and gradient doping of organic solvents, etc.

Inactive Publication Date: 2010-04-28
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

Based on the single molding method of yttrium oxide-based transparent ceramics, it is difficult to prepare complex shapes and gradient doping and other shortcomings, some people have proposed to use tape casting method to prepare yttrium oxide-based green bodies, and to prepare yttrium oxide-based ceramics by debonding and sintering. transparent ceramic
Messing and others prepared YAG transparent ceramics by organic-based casting method, but the organic solvent has the disadvantages of being flammable, harmful to the human body, and high cost.

Method used

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  • Preparation method of yttria-base transparent ceramics with designable component and structure
  • Preparation method of yttria-base transparent ceramics with designable component and structure
  • Preparation method of yttria-base transparent ceramics with designable component and structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 50g of ytterbium oxide-doped yttrium oxide-based mixed powder (in each batch, based on the sum of the number of moles of ytterbium element and the sum of the number of moles of yttrium element, the molar concentrations of ytterbium element are respectively: 0%, 1%, 2 %, 3%, 4%, 5%, 6%, 7%, 8%) and 1g CE64 (polymethacrylic acid dispersant) were added to 10g water, ball milled for 8h to prepare a slurry with a solid content of 47vol%. Then add 6g of DM765 (styrene binder), after ball milling for 3 hours, remove air bubbles, cast to form a film, the thickness of the cast film is 0.8mm.

[0046] Process cast films with different contents into rectangles (3cm in width and 4cm in length), and then cast films with different doping concentrations, the doping concentration of each cast film from top to bottom is 0% / 1% / 2% / 3% / 4% / 5% / 6% / 7% / 8% / 7% / 6% / 5% / 4% / 3% / 2% / 1% / 0% design , stacked layer by layer. The laminated samples were cold isostatically pressed under a pressure of 200MPa, ...

Embodiment 2

[0049] 55g of ytterbium oxide-doped yttrium oxide-based mixed powder (in each batch, based on the sum of the number of moles of ytterbium element and the sum of the number of moles of yttrium element, the molar concentrations of ytterbium element are respectively: 0%, 2%, 4 %, 6%, 8%) and 0.8g of 731A (polycarboxylic acid dispersant) were added into 10g of water, and ball milled for 10h to form a slurry with a volume solid content of 49vol%. Then add 10g of Tongyang Chemical 4700 emulsion (binder), after ball milling for 3 hours, remove air bubbles, cast to form a film, the thickness of the cast film is 1mm.

[0050] Process cast films with different contents into rectangles (3cm in width and 4cm in length), and then cast films with different doping concentrations, the doping concentration of each cast film from top to bottom is 0% / 2% / 4% / 6% / 8% / 6% / 4% / 2% / 0% design, layer by layer. The laminated samples were cold isostatically pressed under a pressure of 250Mpa, and then heated...

Embodiment 3

[0053] The mixed powder of 35g neodymium oxide doped yttrium oxide base (in each batch, with the sum of the molar number of neodymium element and the molar number of yttrium element, the molar concentration of neodymium element is respectively 0%, 0.4%, 0.8% , 1.2%, 1.6%) and 0.7g PE1168 (dibutyl phthalate organic dispersant) were added to 8g butanone-ethanol mixed solution (3:1), ball milled for 10h, and then 5gPVB (organic binder) was added , after ball milling for 3 hours, the casting film was formed, and the thickness of the casting film was 0.4mm.

[0054] Process the cast film with different contents into a rectangle (2cm in width and 6cm in length), and then design according to 0% / 1.6% / 0.8% / 0% / 0.4% / 0.8% / 1.2% / 1.6% / 0% The scheme is stacked. The laminated samples were cold isostatically pressed under a pressure of 150MPa, and then heated to 600°C in a muffle furnace at a speed of 2°C / min for one hour for debonding. After debonding, the sample was cold isostatically press...

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Abstract

The invention belongs to the field of ceramics preparation, in particular to a preparation method of yttria-base transparent ceramics with designable component and structure. The invention uses the method of tape casting to prepare yttria-base ceramic powder doped with laser ions into a cast film; the cast film with different components is laminated to prepare a ceramic biscuit with complex shape and special component and performance by designing the component and structure; after the biscuit unsticks, biscuit density and uniformity are obviously superior to a sample shaped by dry pressing after cold isostatic pressing again. The sintering method of the invention can obtain transparent ceramics with higher performance if compared with the prior art.

Description

technical field [0001] The invention belongs to the field of ceramic molding, design and preparation, and in particular relates to a preparation method of yttrium oxide-based transparent ceramics whose composition and structure can be designed. Background technique [0002] Transparent ceramics not only have the light transmittance like glass, but also have excellent properties such as high temperature resistance, corrosion resistance, and high strength of ceramics. Transparent ceramics have broad application prospects in energy, medical imaging, laser weapons, and exploration. High-performance transparent ceramics are an important frontier direction of research and application in the current material field. Yttrium oxide-based transparent ceramics are one of the typical representatives in the field of transparent ceramics. [0003] At present, transparent ceramics are mainly formed by dry pressing combined with cold isostatic pressing. Such as the Chinese patent 03129618...

Claims

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Application Information

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IPC IPC(8): C04B35/622C04B35/505
Inventor 黄毅华江东亮张景贤林庆玲黄政仁
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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