Method for preparing MgAlON transparent ceramic bisque by gel casting and molding

A technology for gel injection molding and transparent ceramics, applied in ceramic molding machines, manufacturing tools, etc., can solve problems such as unreported research, and achieve the effect of uniform microstructure, smooth surface and good shape

Active Publication Date: 2012-12-19
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no report on the research on the gel i

Method used

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  • Method for preparing MgAlON transparent ceramic bisque by gel casting and molding
  • Method for preparing MgAlON transparent ceramic bisque by gel casting and molding
  • Method for preparing MgAlON transparent ceramic bisque by gel casting and molding

Examples

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Example Embodiment

[0036] Example 1:

[0037] A method for preparing MgAlON transparent ceramic green body by gel injection molding, which includes the following steps:

[0038] 1) Premix preparation: Dissolve 3.81g methacrylamide (abbreviated as MAM) and 0.76g of N,N'-methylenebisacrylamide (abbreviated as MBAM) in 20ml of deionized water to obtain a MAM concentration of 16wt% Solution, add 42.8wt% ammonium polyacrylate aqueous solution (referred to as PAA-NH 4 ) 0.29g is a dispersant (the amount of dispersant added is 0.398wt% of the mass of the MgAlON powder to be formed, calculated as 0.4wt%), after stirring evenly, adjust the pH of the solution to 10 with concentrated ammonia water to obtain a premixed solution;

[0039] 2) Preparation of ceramic slurry: Add 72.8g of MgAlON powder to the premix prepared in step 1), add alumina balls according to the mass ratio of the balls to 1.5:1, put them in the mixing bottle, mix, and ball mill for 8 hours to obtain Ceramic slurry with a solid content of 48vo...

Example Embodiment

[0043] Example 2:

[0044] A method for preparing MgAlON transparent ceramic green body by gel injection molding, which includes the following steps:

[0045] 1) Premix preparation: Dissolve 3.81g of MAM and 0.38g of MBAM in 20ml of deionized water to form a solution with a MAM concentration of 16wt%, and add 0.34g of 42.8wt% PAA-NH 4 As a dispersant, after stirring evenly, adjust the pH value of the solution to 10 with concentrated ammonia water to obtain a premixed liquid;

[0046] 2) Preparation of ceramic slurry: Add 74.6g of MgAlON powder to the premix prepared in step 1), add alumina balls according to the mass ratio of the balls to 1.5:1, put them in the mixing bottle, mix and ball mill for 6 hours to obtain Ceramic slurry with a solid content of 50vol%;

[0047] 3) Injection molding: Vacuum the ceramic slurry prepared in step 2) for 20 minutes to 0.8×10 4 Pa, add 0.37g of 10wt% APS aqueous solution as initiator, 0.37g of TMEDA as catalyst, continue to vacuum for 3min to 0.8×10...

Example Embodiment

[0050] Example 3:

[0051] A method for preparing MgAlON transparent ceramic green body by gel injection molding, which includes the following steps:

[0052] 1) Premix preparation: Dissolve 3.81g of MAM and 0.25g of MBAM in 20ml of deionized water to form a solution with a MAM concentration of 16wt%, and add 0.38g of 42.8wt% PAA-NH 4 As a dispersant, after stirring evenly, adjust the pH value of the solution to 10 with concentrated ammonia water to obtain a premixed liquid;

[0053] 2) Preparation of ceramic slurry: add 76.4g of MgAlON powder to the premix prepared in step 1), add alumina balls according to the mass ratio of the balls to 1.5:1, put them in the mixing bottle, mix, and ball mill for 4 hours to obtain Ceramic slurry with a solid content of 52vol%;

[0054] 3) Injection molding: Vacuum the ceramic slurry prepared in step 2) for 5min to 1.2×10 4 Pa, add 0.38g of 10wt% APS aqueous solution as initiator, 0.38g of TMEDA as catalyst, stir evenly and continue to vacuum for 3mi...

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Abstract

The invention relates to a method for preparing an MgAlON transparent ceramic bisque by gel casting and molding. The method comprises the steps of: 1) preparing a pre-mixed solution; 2) preparing ceramic slurry; 3) casting and molding; 4) drying and degreasing a billet, and finally obtaining the MgAlON ceramic bisque. The MgAlON ceramic bisque prepared by the method is smooth in surface, intact in shape, and uniform in microscopic structure; the bending strength of a dried billet is greater than 10MPa, and the micro-structure and mechanical property of a sample are superior to those of the ceramic bisque prepared by the other traditional ceramic molding methods.

Description

technical field [0001] The invention relates to a method for preparing MgAlON transparent ceramic green body by gel injection molding, which belongs to the field of transparent ceramic material preparation. Background technique [0002] The so-called transparent ceramics refer to a class of polycrystalline ceramic materials that not only have the inherent high temperature resistance, corrosion resistance, high insulation, high strength and other characteristics of ceramics, but also have good optical transparency. Due to their excellent performance, transparent ceramic materials have great application potential in devices with complex shapes such as transparent lamps, lasers, transparent armor, optical windows and camera lenses, and are attracting increasing attention from researchers. Among them, non-oxide aluminum oxynitride (AlON, MgAlON, LiAlON, etc.) transparent ceramics have isotropic optical properties, wide light transmission range (0.2~6.0μm), and are easier to prod...

Claims

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Application Information

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IPC IPC(8): B28B1/14C04B35/58
Inventor 王皓徐慧琴王为民傅正义
Owner WUHAN UNIV OF TECH
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