Preparation method of fiber composite boron carbide foamed ceramic material
A technology of composite boron carbide and foam ceramics, applied in ceramic products, applications, household appliances, etc., can solve the problems of polymer molecular weight reduction, limited shielding effect, and softening temperature drop, so as to promote rapid attenuation, compact structure, and strengthen mechanical properties. intensity effect
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Embodiment 1
[0025] Using 24g of water as a dispersant, add 6.80g of boron carbide powder with an average particle size of 0.5μm to make a slurry, then add 0.05g of silicon powder, 0.51g of aluminum powder, 0.64g of silicon carbide fiber, and add 0.08g of polymethacrylic acid Ammonium. 180r / min mixing and ball milling for 2h to obtain the mixed solution I. After the mixed solution I was heated to 80° C., 0.98 g of gelatin was added and mixed evenly to obtain the mixed solution II. Pour the resulting mixed solution II into a freezer container, place the container on the top of the metal heat conduction column of the freezer prepared in advance, and inject liquid nitrogen into the freezer barrel with liquid nitrogen as the cold source. After the mixed solution is completely frozen, the freezing container is removed, and it is placed in a freeze-drying box to freeze-dry to obtain a green body. Take the freeze-dried body out of the freezer and put it in a tube furnace. Under the atmosphere o...
Embodiment 2
[0027] Using 24g of water as a dispersant, add 6.96g of boron carbide powder with an average particle size of 0.5μm to make a slurry, then add 0.10g of silicon powder, 0.40g of aluminum powder, 0.48g of silicon carbide fiber, and add 0.10g of polymethacrylic acid Ammonium. 200r / min mixing and ball milling for 1.5h to obtain the mixed solution I. After the mixed solution I was heated to 60° C., 0.85 g of gelatin was added and mixed evenly to obtain the mixed solution II. Pour the resulting mixed solution II into a freezer container, place the container on the top of the metal heat conduction column of the freezer prepared in advance, and inject liquid nitrogen into the freezer barrel with liquid nitrogen as the cold source. After the mixed solution is completely frozen, the freezing container is removed, and it is placed in a freeze-drying box to freeze-dry to obtain a green body. Take the freeze-dried body out of the freezer and put it in a tube furnace. Under the atmosphere...
Embodiment 3
[0029] Using 24g of water as a dispersant, add 7.20g of boron carbide powder with an average particle size of 0.5μm, add 0.13g of silicon powder, 0.48g of aluminum powder, 0.20g of carbon fiber, and add 0.12g of polyammonium methacrylate. 160r / min mixing and ball milling for 1.5h to obtain the mixed solution I. After the mixed solution I was heated to 60° C., 0.75 g of polyvinyl alcohol was added and mixed uniformly to obtain the mixed solution II. Pour the resulting mixed solution II into a freezer container, place the container on the top of the metal heat conduction column of the freezer prepared in advance, and inject liquid nitrogen into the freezer barrel with liquid nitrogen as the cold source. After the mixed solution is completely frozen, the freezing container is removed, and it is placed in a freeze-drying box to freeze-dry to obtain a green body. Take the freeze-dried body out of the freezer and put it in a tube furnace. Under the atmosphere of argon flow, raise t...
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