Preparation of multilayer semitransparent zirconia full-porcelain dental repair material
A restoration material and zirconia technology, which is applied in the field of multi-layer translucent zirconia all-ceramic dental restoration materials and their preparation, and achieves the effects of good process repeatability, high molding density and stable product quality
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Embodiment 1
[0021] Example 1 Preparation of MgO partially stabilized zirconia powder by hydrothermal method
[0022] Configure a mixed solution of 0.95mol / l ZrOCl2 and 0.05mol / l Mg(NO3)2, add ammonia water as a precipitant under stirring conditions, and control the pH value to 8~9. The precipitate was then filtered and washed until the washes were free of Cl - (It can be detected with 0.1mol / l silver nitrate solution). Mix the obtained precipitate with an appropriate amount of deionized water (about (2~3) times the weight of the precipitate) and place it in a hydrothermal reaction kettle, heat up in a closed manner, the heating rate is 4°C / min, the reaction temperature is 180°C, and the pressure is 1MPa , reaction time 2h, get MgO-ZrO 2 Powder suspension, filtered and dried at 120°C for 24 hours to obtain ZrO partially stabilized by MgO 2 Powder. It can be observed through a transmission electron microscope that the particle size of the powder is about 18nm.
Embodiment 2
[0023] Example 2 Preparation of translucent dental zirconia restoration material
[0024] Partially stabilized tetragonal zirconia powder, 4gZnO and colorant 0.5g CeO, 0.5g Er obtained by the method of embodiment 1 with 123g 2 o 3 , mixed with 0.2g MnO, then added 3wt%PVA, carried out rapid ball milling for 2h, and sprayed and granulated at 180°C to prepare a dental zirconia restoration material with a particle diameter of about 50μm.
Embodiment 3
[0025] Example 3 Preparation of Translucent Dental Zirconia Restoration Material
[0026] Partially stabilized tetragonal zirconia powder, 4g ZnO and colorant 0.05g CeO, 0.05g Er obtained by the method of embodiment 1 with 123g 2 o 3 , mixed with 0.02g MnO, then added 4wt% PVA, carried out rapid ball milling for 2.5h, and sprayed and granulated at 200°C to obtain a dental zirconia restoration material with a particle diameter of about 48μm.
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