High-tenacity dental ceramic bracket material and preparation method thereof
A dental ceramic, high toughness technology, applied in the field of orthodontics, can solve the problems of cracking of common ceramic brackets, and achieve the effect of improving the flexural strength
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[0033] Example 1
[0034] 1. Preparation of bracket materials: 1) Weigh 10 parts by weight of zirconia powder with a particle size of 30nm, 2 parts of yttrium trioxide powder with a particle size of 10 nm, 1 part of lauric acid, 5 parts of magnesium oxide, 82 parts Alumina is ready for use; 2) First, mix the zirconia powder, yttrium trioxide powder, and lauric acid by ball milling, then add magnesia, continue ball milling and mix the alumina, and take out the powder;
[0035] 2. Preparation of the bracket: press the powder prepared in the previous step into the forming mold under 2Mpa, heat up to 1400°C at a rate of 10°C / min under the protection of nitrogen, keep it for 2 hours, and cool to room temperature along with the furnace.
[0036] 3. Bracket strength test: After the strength test, the compression strength of the bracket is 1476Mpa and the flexural strength is 793Mpa.
[0037]
Example Embodiment
[0038] Example 2
[0039] 1. Preparation of bracket material: 1) Weigh 20 parts of zirconia powder with a particle size of 10 nm, 5 parts of yttrium trioxide powder with a particle size of 10 nm, 5 parts of stearic acid, 2 parts of magnesium oxide, 68 parts by weight A portion of alumina for use; 2) First, mix the zirconia powder, yttrium trioxide powder, and lauric acid by ball milling and then add magnesium oxide, continue ball milling and mixing the alumina, and take out the powder;
[0040] 2. Preparation of the bracket: Press the powder prepared in the previous step into the forming mold under 4Mpa, heat up to 1500°C at a rate of 10°C / min under nitrogen protection, keep it for 2 hours, and cool to room temperature along with the furnace.
[0041] 3. Bracket strength test: After strength test, the compressive strength of the bracket is 1657Mpa and the flexural strength is 868Mpa.
[0042]
Example Embodiment
[0043] Example 3
[0044] 1. Preparation of bracket materials: 1) Weigh 5 parts by weight of zirconia powder with a particle size of 20 nm, 3 parts of yttrium trioxide powder with a particle size of 20 nm, 2 parts of stearic acid, 1 part of magnesium oxide, 68 A portion of alumina for use; 2) First, mix the zirconia powder, yttrium trioxide powder, and lauric acid by ball milling and then add magnesium oxide, continue ball milling and mixing the alumina, and take out the powder;
[0045] 2. Preparation of the bracket: press the powder prepared in the previous step into the forming mold under 4Mpa, heat up to 1600°C at a rate of 10°C / min under the protection of argon, keep it for 2 hours, and cool to room temperature along with the furnace.
[0046] 3. Bracket strength test: After strength testing, the compressive strength of the bracket is 1586Mpa and the flexural strength is 813Mpa.
[0047]
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