Silicon carbide ceramic and preparation method thereof
A technology of silicon carbide ceramics and silicon carbide, which is applied in the field of ceramic processing, can solve the problems of poor impact resistance, poor impact resistance, and inability to cool with the furnace, and achieve the effect of uniform pressure, the same pressure, and improved flexural strength
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Embodiment 1
[0037] Parts in the embodiments represent parts by weight.
[0038] Silicon carbide powder (purity > 98%, particle size 50 μm and 10 μm respectively) is used for silicon carbide, and hexagonal boron nitride particles (h-BN, average particle size less than 4 μm, purity > 98%) are used for boron nitride.
[0039] Step 1, Grading of SiC Powder
[0040] The silicon carbide powder was weighed according to the mass ratio of 200 μm: 60 μm: 15 μm: 1 μm = 0.55: 0.2: 0.2: 0.05.
[0041] Step 2, wet ball milling
[0042] Mix 68 parts of silicon carbide, 12 parts of boron nitride, 10 parts of silicon powder, 6 parts of aluminum oxide and 4 parts of diyttrium trioxide to form the main raw material; then add 3 parts of polyvinyl alcohol, 2 parts of tetramethylhydrogen Ammonium oxide and 120 parts of deionized water were ball milled for 4 hours to form a slurry with a solid phase content of 50%.
[0043] Step 3, spray granulation
[0044] The slurry is subjected to spray granulation, and...
Embodiment 2
[0052] Parts in the embodiments represent parts by weight.
[0053] Silicon carbide powder (purity > 98%, particle size 50 μm and 10 μm respectively) is used for silicon carbide, and hexagonal boron nitride particles (h-BN, average particle size less than 4 μm, purity > 98%) are used for boron nitride.
[0054] Step 1, Grading of SiC Powder
[0055] The silicon carbide powder was weighed according to the mass ratio of 200 μm: 60 μm: 15 μm: 1 μm = 0.55: 0.2: 0.2: 0.05.
[0056] Step 2, wet ball milling
[0057] Mix 68 parts of silicon carbide, 12 parts of boron nitride, 10 parts of silicon powder, 6 parts of aluminum oxide and 4 parts of diyttrium trioxide to form the main raw material; then add 3 parts of polyvinyl alcohol, 2 parts of tetramethylhydrogen Ammonium oxide and 120 parts of deionized water were ball milled for 4 hours to form a slurry with a solid phase content of 50%.
[0058] Step 3, spray granulation
[0059] The slurry is subjected to spray granulation, and...
Embodiment 3
[0067] Parts in the embodiments represent parts by weight.
[0068] Silicon carbide powder (purity > 98%, particle size 50 μm and 10 μm respectively) is used for silicon carbide, and hexagonal boron nitride particles (h-BN, average particle size less than 4 μm, purity > 98%) are used for boron nitride.
[0069] Step 1, Grading of SiC Powder
[0070] The silicon carbide powder was weighed according to the mass ratio of 200 μm: 60 μm: 15 μm: 1 μm = 0.55: 0.2: 0.2: 0.05.
[0071] Step 2, wet ball milling
[0072] Mix 68 parts of silicon carbide, 12 parts of boron nitride, 10 parts of silicon powder, 6 parts of aluminum oxide and 4 parts of diyttrium trioxide to form the main raw material; then add 3 parts of polyvinyl alcohol, 2 parts of tetramethylhydrogen Ammonium oxide and 120 parts of deionized water were ball milled for 4 hours to form a slurry with a solid phase content of 50%.
[0073] Step 3, spray granulation
[0074] The slurry is subjected to spray granulation, and...
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