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Ultralight closed cell foam ceramic preparation

A closed-cell foam ceramic and inorganic sodium salt technology, applied in the field of ceramics, can solve the problems of single product shape, high sintering temperature, uneven distribution of pores, etc., and achieve the effect of preventing cracking and uniform distribution of pores.

Inactive Publication Date: 2015-12-23
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing ultra-light closed-cell foam ceramics to solve the problems of uneven distribution of pores, complex process, single product shape, high sintering temperature and high cost in the prior art

Method used

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  • Ultralight closed cell foam ceramic preparation
  • Ultralight closed cell foam ceramic preparation
  • Ultralight closed cell foam ceramic preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1, solid content 27.5%: silicon dioxide 20%, aluminum oxide 5%, sodium bicarbonate 2.5%.

[0033] Step 2, preparation of premix: 80ml of water, 50ml of tert-butanol, 7% of acrylamide, 1% of N,N-methylenebisacrylamide.

[0034] Step 3: Injection molding: After mixing the components according to the experimental design, pour them into a ball mill for ball milling for 4 hours, take out the slurry and place it in a water bath at 45°C for 20 minutes. Add reagents and their addition amounts to the slurry: 1 ml of n-butanol, 1 ml of ammonium persulfate as an initiator, and 0.06 ml of tetramethylethylenediamine as a catalyst. First add the initiator and stir for 1-5 minutes, then add the catalyst and continue stirring for 1-10 minutes before pouring into the mold.

[0035] Step 4, drying: put it into a blast drying oven at 70°C for 12 hours after being surface-dried in a natural environment.

[0036] Step 5, sintering: set the temperature control program and sinter direc...

Embodiment 2

[0038] Step 1, solid content 27.5%: silicon dioxide 17.5%, aluminum oxide 5%, ceramic clay 2.5%, sodium bicarbonate 2.5%.

[0039] Step 2, preparation of premix: 70ml of water, 60ml of tert-butanol, 12% of acrylamide, 2.5% of N,N-methylenebisacrylamide.

[0040] Step 3, injection moulding: After preparing each component according to the experimental design, pour it into a ball mill for ball milling for 4 hours, take out the slurry and place it in a water bath environment at 45°C and heat it for 20 minutes. Add reagents and their addition amounts to the slurry: 1 ml of initiator ammonium persulfate, and 0.06 ml of catalyst tetramethylethylenediamine. First add the initiator and stir for 1-5 minutes, then add the catalyst and continue stirring for 1-10 minutes before pouring into the mold.

[0041] Step 4, drying: put it into a blast drying oven at 60°C for 12 hours after being surface-dried in a natural environment.

[0042] Step 5, sintering: set the temperature control prog...

Embodiment 3

[0044] Step 1, solid content 50%: silicon dioxide 46%, aluminum oxide 4.5%, sodium bicarbonate 2%.

[0045] Step 2, premix preparation: 100ml of water, 20ml of tert-butanol, 8% of acrylamide, 3% of N,N-methylenebisacrylamide.

[0046] Step 3, injection moulding: After preparing each component according to the experimental design, pour it into a ball mill for ball milling for 4 hours, take out the slurry and place it in a water bath environment at 45°C and heat it for 20 minutes. Add reagents and their addition amounts to the slurry: 1 ml of n-butanol, 1 ml of ammonium persulfate as an initiator, and 0.06 ml of tetramethylethylenediamine as a catalyst. First add the initiator and stir for 1-5 minutes, then add the catalyst and continue stirring for 1-10 minutes before pouring into the mold.

[0047] Step 4, drying: put it into a blast drying oven at 70°C for 12 hours after being surface-dried in a natural environment.

[0048]Step 5, sintering: set the temperature control pro...

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Abstract

The invention relates to an ultralight closed cell foam ceramic preparation method, which comprises: 1, obtaining 10-50 wt% of a solid, wherein the solid comprises 10-50 wt% of silica, 4-10 wt% of alumina and 1-5% of an inorganic sodium salt, preferably further comprises 0-4 wt% of ceramic clay and / or 0.5-5 wt% of slag, or the solid comprises 15-25 wt% of slag and 1-5 wt% of an inorganic sodium salt; 2, preparing a pre-mixing liquid, wherein the pre-mixing liquid comprises 5-15 wt% of acrylamide, 1-3 wt% of N,N-methylene bisacrylamide, and the balance of water and tert-butanol; 3, mixing the solid and the pre-mixing liquid, and carrying out ball milling to prepare a slurry; 4, injecting into a mold, wherein the slurry is placed in a water bath environment with a temperature of 20-45 DEG C, heating for 10-20 min, adding 0.1-1 ml of n-butanol, 0.5-1 ml of an initiator ammonium persulfate, and 0.01-0.1 ml of a catalysts tetramethylethylenediamine to the slurry, and pouring into the mold; 5, drying; and 6, sintering.

Description

technical field [0001] The invention relates to the field of ceramics, in particular to a preparation method of ultra-light closed-cell foam ceramics. Background technique [0002] As early as the 1970s, industrially developed countries began the research and development of foam ceramics, and in 1978, American scientists first developed and successfully applied them to aluminum alloy pouring systems. my country began to study foam ceramics in the mid-1980s. It has been more than 30 years now. [0003] During this period, new processes have emerged continuously. The current preparation processes include: adding pore-forming agent process, organic precursor impregnation process, foaming process, sol-gel process and gel injection molding process. [0004] The disadvantage of adding a pore-forming agent is that the uniformity of the pore distribution is poor and the porosity is low; the disadvantage of the organic precursor impregnation process is that the shape and density of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B35/14
Inventor 崔月华涂强
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI