Curing and forming die for preparing foamed ceramic according to protein foaming method and preparation method of curing and forming die

A technology of solidification molding and foam ceramics, which is applied in the direction of ceramic molding machines, ceramic products, household appliances, etc. It can solve the problems of blank body cracking, uneven product pore size distribution, uncontrollable slurry curing air pressure, etc., and achieve good formability, The effect of low cost and no pollution to the environment

Active Publication Date: 2012-11-07
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the currently commonly used curing process, the curing pressure of the slurry is uncontrollable, which leads to cracking of the green body and uneven pore size distribution of the product.

Method used

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  • Curing and forming die for preparing foamed ceramic according to protein foaming method and preparation method of curing and forming die
  • Curing and forming die for preparing foamed ceramic according to protein foaming method and preparation method of curing and forming die
  • Curing and forming die for preparing foamed ceramic according to protein foaming method and preparation method of curing and forming die

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1: Preparation of solidification molding molds for foam ceramics by protein foaming method.

[0042] a kind of like figure 1 , Figure 10 ~ Figure 14 The protein foaming method of the present invention is shown to prepare the curing molding mold for foam ceramics. The curing molding mold of this embodiment includes a mold body 1 and a mold cover 2. The mold body 1 and the mold cover 2 are hermetically connected to form a hollow mold cavity 4 , the mold cover 2 is provided with an air pressure control valve 3 (see Figure 13 ), the air pressure control valve 3 is provided with an air flow channel 5 connecting the mold cavity 4 and the outside world, and the opening and closing of the air pressure control valve 3 is regulated by the atmospheric pressure difference between the mold cavity 4 and the outside world. Such as Figure 14 As shown, the air pressure control principle in the mold is: during the curing molding process, as the curing temperature increase...

Embodiment 2

[0043] Embodiment 2: the method for preparing foamed ceramics by protein foaming method.

[0044] A kind of protein foaming method of the present invention prepares the method for silicon nitride ceramics, comprises the following steps:

[0045] (1) Preparation of foam slurry: mix and dissolve silicon nitride powder, sintering aids cerium oxide and alumina, and DURAMAX-D3005 dispersant produced by Rohm and Haas in water, and add silicon nitride powder to solvent water The amount is 40vol.%, the addition amount of sintering aid cerium oxide and aluminum oxide relative to the silicon nitride powder is 6wt% and 2wt%, respectively, the addition amount of D3005 dispersant relative to the solid phase component is 0.35wt.%, ball milling 20 Hour; Then add its 8wt.% egg white protein powder to the mixed component after ball milling, obtain foam slurry after ball milling for 2 hours;

[0046] (2) Curing molding: inject the obtained foam slurry into an open molding mold (the mold is o...

Embodiment 3

[0052] A kind of protein foaming method of the present invention prepares the method for silicon nitride ceramics, comprises the following steps:

[0053] (1) Preparation of foam slurry: mix and dissolve silicon nitride powder, sintering aids cerium oxide and alumina, and DURAMAX-D3005 dispersant produced by Rohm and Haas in water, and add silicon nitride powder to solvent water The amount is 40vol.%, the addition amount of sintering aid cerium oxide and aluminum oxide relative to the silicon nitride powder is 6wt% and 2wt%, respectively, the addition amount of D3005 dispersant relative to the solid phase component is 0.35wt.%, ball milling 20 Hour; Then add its 8 wt.% egg white protein powder to the mixed component after ball milling, obtain foam slurry after ball milling for 2 hours;

[0054] (2) Curing molding: inject the obtained foam slurry into a completely closed mold (the mold is completely sealed, and the curing molding pressure is continuously increased), and then...

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Abstract

The invention discloses a curing and forming die for preparing foamed ceramic according to a protein foaming method. The curing and forming die comprises a die body and a die cover, wherein the die body is connected with the die cover in a sealing manner to form a die cavity; a pneumatic control valve is arranged on the die cover; an airflow passage is formed in the valve; and the opening and closing of the pneumatic control valve is regulated by the atmospheric pressure difference between the die cavity and the outside. The invention further discloses a method for preparing the foamed ceramic through protein foaming. The method comprises the steps as follows: raw materials are mixed, dissolved in water and ball-milled, and then albumen protein powder is added to obtain foam slurry; the foam slurry is injected into the curing and forming die and is cured in water bath to form a blank body; then the blank body is dried and heated to the protein burning-off temperature, and heat preservation is performed; and finally, heating sintering is carried out under nitrogen protection, and heat preservation is performed to obtain the foamed ceramic. The curing and forming die provided by the invention has the advantages of simple structure, low cost, easiness in control, good product quality and the like.

Description

technical field [0001] The invention relates to a mold for preparing foam ceramics and a preparation method, in particular to a curing molding mold for preparing foam ceramics by a protein foaming method and a preparation method. Background technique [0002] Foamed ceramics are widely used in filtration, thermal engineering, heat insulation, sound absorption, electronics, optoelectronics, sensing, environmental biology and chemistry due to their advantages such as low density, low thermal conductivity, large specific surface area, high temperature resistance, and corrosion resistance. It can be used as sewage treatment material, molten metal filter material, catalyst carrier, biological functional material, sound insulation and sound absorption material and heat insulation material, etc. However, due to the complex preparation process and high preparation cost of foam ceramics, the practical application of foam ceramics is far from meeting people's expectations. Foamed cer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B7/00B28B1/50C04B38/06
Inventor 周新贵张长瑞余金山刘荣军殷刘彦王洪磊赵爽罗征杨备杨会永
Owner NAT UNIV OF DEFENSE TECH
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