Porous silica ceramic with double layers of pores and preparation method thereof
A technology of porous silica and nano-silica, which is applied in the field of porous silica ceramics and its preparation, can solve the problems of poor damage resistance, high maintenance cost, and short replacement cycle, and achieve high compressive strength, mechanical Good performance and high porosity
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0030] Weigh 100 parts of liquid tert-butanol, 20 parts of monomeric acrylamide, 2 parts of N-N' methylenebisacrylamide, and 2 parts of citric acid, mix and stir them to prepare a premixed solution for future use. Weigh 15g of nano-silica powder, 100ml of premix, and mill for 4 hours in a planetary ball mill; take out the slurry, add 3ml of initiator ammonium persulfate per 20ml of slurry, catalyst N,N,N'N'-tetramethylethylenedi 3 drops of amine, stirred evenly and poured into the plexiglass mold, shaking manually to remove possible pores; standing for 0.5min to solidify, and 12 hours in a drying oven at 50°C, tert-butanol volatilized to form pores. The obtained green body was scanned and analyzed by figure 1 It can be seen that the prepared porous silica contains double-level pores, and the pore size distribution is uniform; it can be seen that small pores are evenly distributed on the pore walls of the large pores. Cross-linked material filling; such as figure 2 , and con...
Embodiment 2
[0033] Weigh 100 parts of liquid tert-butanol, 20 parts of monomeric acrylamide, 2 parts of N-N' methylenebisacrylamide, and 2 parts of citric acid, mix and stir them to prepare a premixed solution for future use. Weigh 15g of nano-silica powder, 100ml of premix, and mill for 4 hours in a planetary ball mill; take out the slurry, add 3ml of initiator ammonium persulfate per 20ml of slurry, catalyst N,N,N'N'-tetramethylethylenedi 3 drops of amine, stirred evenly and poured into the plexiglass mold, shaking manually to eliminate possible pores; standing for 0.5min to solidify, 12 hours in a 50°C drying oven, tert-butanol volatilized to form pores; sintering in a high-temperature furnace, heat preservation at 600°C Exclude monomers and other organic matter for 30 minutes, and finally sinter at 1100°C and hold for 2 hours to prepare porous silica ceramics with double-layer pores. The relevant properties are shown in Table 1.
Embodiment 3
[0035] Weigh 100 parts of liquid tert-butanol, 20 parts of monomeric acrylamide, 2 parts of N-N' methylenebisacrylamide, and 2 parts of citric acid, mix and stir them to prepare a premixed solution for future use. Weigh 15g of nano-silica powder, 100ml of premix, and mill for 4 hours in a planetary ball mill; take out the slurry, add 3ml of initiator ammonium persulfate per 20ml of slurry, catalyst N,N,N'N'-tetramethylethylenedi Amine, stir evenly and pour into the plexiglass mold, shake manually to remove possible pores; let it stand for 0.5min to solidify, and put it in a drying oven at 50°C for 12 hours, tert-butanol volatilizes to form pores; sinter in a high-temperature furnace, and keep it warm for 30min at 600°C Exclude organic matter such as monomers, and finally sinter at 1150°C and hold for 2 hours to prepare porous silica ceramics with double-layer pores. The relevant properties are shown in Table 1.
[0036] The resulting product was scanned and analyzed by image...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More