Gel injection molding method of engineering ceramic

A technology of gel injection molding and engineering ceramics, which is applied in the field of engineering ceramics gel injection molding, can solve the problems of low strength of engineering ceramics dry green bodies, affecting the quality of engineering ceramic bodies, and low room temperature bending strength, etc., to achieve The molding process is easy to control, the production cost is low, and the production efficiency is high

Active Publication Date: 2014-02-05
冷水江市明玉陶瓷工具有限责任公司
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Problems solved by technology

For example, gelatin, agarose, pectin, carrageenan (carrageenan), etc. have the characteristics of thermal sol, that is, they dissolve when heated to a certain temperature in water, and form gel and solidify when cooled, but the heating of the slurry will cause some Evaporation of water affects the viscosity of the slurry, making it more difficult to control the production process, thereby affecting the quality of the engineering ceramic body; the gel injection molding of...

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  • Gel injection molding method of engineering ceramic
  • Gel injection molding method of engineering ceramic

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Embodiment 1-6

[0018] Examples 1-6 See Table 1 for the cross-linking agent (Carbomer 934P), initiator (triethanolamine), and solvent ratios added to the gel injection molding of different types of engineering ceramic materials.

[0019] Table 1

[0020]

[0021] Note: The sum of the weight percentage of ceramic material and solvent in Table 1 is 100wt%; The percentage by weight of the total weight of ceramic powder.

[0022] Specific steps are as follows:

[0023] (1) Weigh the mixed engineering ceramic powder and carbomer (cross-linked polyacrylic resin) according to the weight percentage distribution ratio in Table 1, and obtain a suspended and stable slurry for 4 hours;

[0024] (2) Add the initiator to the slurry obtained in step (1) according to the weight percentage ratio described in Table 1, and after ball milling for 8 minutes, vacuum defoaming for 7 minutes;

[0025] (3) Inject into the mold and form in situ solidified colloidal state, dry at room temperature for 17 hours, d...

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Abstract

The invention relates to a gel injection molding method of engineering ceramic, which comprises the following steps: (1) adding mixed engineering ceramic powder and a crosslinking agent carbomer accounting for 0.8-1.5 wt% of the mixed engineering ceramic powder into a solvent, and carrying out mixing and ball milling for 3-5 hours to obtain a stable suspension slurry; (2) adding an initiator accounting for 0.5-1.0 wt% of the mixed engineering ceramic powder into the slurry, carrying out ball milling for 7-9 minutes, and defoaming in a vacuum for 6-8 minutes; and (3) injecting into a mold, carrying out in-situ solidification colloid molding, drying, demolding, and drying in a constant temperature oven to obtain the engineering ceramic. The method is simple to operate, has the advantages of stable technique, controllable molding process, low production cost and high production efficiency, and is suitable for near-net size molding of various engineering ceramic powders.

Description

technical field [0001] The invention relates to a gel injection molding method for engineering ceramics. Background technique [0002] Forming is a key link in the production process of engineering ceramics with close dimensions and complex shapes. [0003] Gel injection molding is an advanced ceramic molding method, which provides an effective technical way to prepare engineering ceramics with complex shapes. Gel injection molding was proposed by M.A.Janney and O.O.Omatete of Oak Ridge National Laboratory in the United States in the early 1990s. The system used is acrylamide, but because acrylamide monomer has neurotoxicity, it is not conducive to human health and environmental protection. , thus limiting its scope of application. Although later M.A.Janney and O.O.Omatete developed gel injection molding of a series of low-toxic system organic monomers such as methacrylamide and 2-hydroxyethyl methacrylate, the control of the molding process of these organic monomers is re...

Claims

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Application Information

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IPC IPC(8): C04B35/624
Inventor 胡铁武康益群伍正人孙青乐
Owner 冷水江市明玉陶瓷工具有限责任公司
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