Polycrystal zirconium oxide ceramic dental material and preparation thereof
A technology of zirconia ceramics and ceramic teeth, which is applied in dental preparations, dentistry, dentures, etc., can solve the problems of affecting the aesthetic effect of ceramic teeth, durability and reliability, and easy aging of fiber-reinforced resin, so as to facilitate industrial production, Reliable performance and stable product quality
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Embodiment 1
[0037] Using Y-ZrO 2 Ceramic powder, the average particle size is 0.4μm. First heat the mixer to 150°C, add 7wt.% polyethylene (PE) to the mixer, then slowly add paraffin (5wt.%) and diethyl phthalate (DEP) (3wt. %), after being completely melted. Zirconia ceramic powder is then added, and the ceramic powder accounts for 85wt.% by weight. Knead for about 30 minutes to achieve a completely uniform state without agglomeration. Finally, the mixed material is taken out to cool, and then crushed and granulated to obtain granular material.
[0038] Add about 500 grams of the above-mentioned granulated pellets into the cylinder of the injection molding machine and melt them, inject the molten feed into the mold under the injection pressure of 120MPa, cool for 2 minutes, and then the zirconia ceramic tooth post can be demolded green body.
[0039] Put the green body into an alumina crucible, and fill corundum sand around the sample, raise the temperature in the muffle furnace to ...
Embodiment 2
[0042] Using Y-ZrO 2 Ceramic powder, the average particle size is 0.2μm. First heat the two-roller kneader to 135° C., add 8 wt.% polystyrene into the kneader, and melt and knead for about 5 minutes. Paraffin (8 wt.%) and dibutyl phthalate (DBP) (4 wt.%) were added slowly. Then add zirconia ceramic powder, the ceramic powder accounts for 80wt.% by weight. Mix for 35 minutes to achieve complete homogeneity. Finally, the mixed material is taken out to cool, and then crushed and granulated to obtain granular material.
[0043] Add about 500 grams of the above-mentioned granulated pellets into the cylinder of the injection molding machine and melt them slowly, inject the molten feed into the mold under the injection pressure of 80MPa, cool for 3 minutes, and then the zirconia ceramic tooth post can be demolded green body.
[0044] Put the green body into an alumina crucible, fill corundum sand around the sample, raise the temperature in the muffle furnace to 550°C at a rate o...
Embodiment 3
[0047] Using Y-ZrO 2Ceramic powder, the average particle size is 0.6μm. First heat the two-roller kneader to 180°C, add 5wt.% polymethyl methacrylate into the kneader, and then slowly add microcrystalline paraffin (5wt.%) and phthalic acid di Octyl esters (2 wt.%). Zirconia ceramic powder is then added, and the ceramic powder accounts for a weight percentage of 88wt.% of the total amount. Mix for 40 minutes to achieve complete homogeneity. Finally, the mixed material is taken out to cool, and then crushed and granulated to obtain granular material.
[0048] Add about 500 grams of the above-mentioned granulated pellets into the cylinder of the injection molding machine and melt them, inject the molten feed into the mold under the injection pressure of 100MPa, cool for 2 minutes, and then the zirconia ceramic tooth post can be demolded green body.
[0049] Put the green body into an alumina crucible, and fill corundum sand around the sample, raise the temperature in the muf...
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