Protein foaming method for preparing porous ceramics composite material

A technology of porous ceramics and composite materials, used in ceramic products, applications, household appliances, etc., can solve problems such as toxic gases, endanger human health, pollute the environment, etc., to increase the strength of the green body, improve the rheological properties, foaming uniform effect

Inactive Publication Date: 2011-02-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention solves the problem that the foaming agent used to prepare porous ceramics by the foaming method produces toxic gas when it volatilizes, which endangers human health and pollutes the environment, and provides a method for preparing porous ceramic composite materials by using the protein foaming method

Method used

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  • Protein foaming method for preparing porous ceramics composite material
  • Protein foaming method for preparing porous ceramics composite material
  • Protein foaming method for preparing porous ceramics composite material

Examples

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specific Embodiment approach 1

[0011] Specific Embodiment 1: In this embodiment, the method for preparing porous ceramic composite materials by protein foaming method is as follows: 1. Mix 26.5g-158.8g aggregate, 40g-80g egg white, 3mL deionized water and 5g polysaccharide, add dispersing The amount of dispersant added is 0.5% of the aggregate mass, and then dispersed by a ball mill for 12 hours to obtain a slurry with an aggregate volume content of 10% to 50%; 2. Pour the slurry into a polytetrafluoroethylene mold , and then placed in a constant temperature drying oven at 75-85°C for 30-90 minutes to cure and mold. After demoulding, place it at room temperature for 12-48 hours, and then put it in an oven at 110-130°C to dry and mold to obtain samples; 3. The samples Process it into the desired shape, put it into a sintering furnace, then raise the temperature to 230°C at a heating rate of 2°C / min, keep it at 230°C for 30 minutes, raise it to 360°C at a heating rate of 2°C / min, and keep it at 360°C for 1 hou...

specific Embodiment approach 2

[0013] Embodiment 2: This embodiment is different from Embodiment 1 in that the particle size of the ceramic powder is 0.1 μm-3 μm. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0014] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the ceramic powder is silicon oxide, one of alumina, zirconia, mullite, silicon carbide and silicon nitride. species or a combination of several of them. Others are the same as those in the first or second embodiment.

[0015] In this embodiment, when the ceramic powder is a composition, the ratio of each component is arbitrary.

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Abstract

The invention discloses a protein foaming method for preparing a porous ceramics composite material, and relates to a method for preparing a composite material. The method solves the problem that toxic gas is generated to harm human health and pollute environment when a foaming agent is volatilized in a foaming method for preparing porous ceramics. The method comprises the following steps of: 1, preparing slurry; 2, preparing a sample; and 3, processing the sample into a required shape, sintering in a sintering furnace, and cooling with the furnace to room temperature to obtain the porous ceramics composite material. Compared with other methods, the method has the advantages that: a microstructure is controllable and is molded simply; and toxic gas and harmful substances polluting environment are not generated when proteins are decomposed. Polysaccharide macromolecules and water molecules form hydrogen bonds to keep the foaming stability; meanwhile, the polysaccharide macromolecules have net structures to improve the blank strength, adjust the fluidity of the slurry, improve the rheological properties of the slurry and make the foaming uniform.

Description

technical field [0001] The invention relates to a method for preparing a composite material. Background technique [0002] Porous ceramics have the advantages of high temperature resistance, wear resistance, chemical corrosion resistance, thermal shock resistance, etc., and have great application potential in traditional industries such as chemical industry, energy, petroleum, etc. and high-tech fields such as electronics, medicine, and biochemistry. At present, although porous ceramics have developed to a great extent, the preparation technology of porous ceramics is also increasingly abundant. But there are still many problems to be solved. Compared with other processes, the foaming process has unique advantages, especially the closed-pore ceramic products and products produced have higher porosity and higher strength. Due to the addition of components such as foaming initiators, catalysts and forming agents in the existing porous ceramics, the process complexity is incr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02
Inventor 武勇斌赫晓东史丽萍何飞李明伟钟业盛
Owner HARBIN INST OF TECH
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