Preparation method for ivory color-imitating yttrium oxide and praseodymium oxide co-stabilized tetragonal zirconia nano ceramic powder

Abstract

The invention provides a preparation method for ivory color-imitating yttrium oxide and praseodymium oxide co-stabilized tetragonal zirconia nano ceramic powder. The preparation method is characterized by comprising the following steps of (1) weighing zirconium oxychloride octahydrate barium hydroxide octahydrate, a praseodymium raw material and a yttrium raw material respectively according to stoichiometric ratio of various metal elements in (Pr6O11)x(Y2O3)y(ZrO2)1-6x-2y (wherein 0.0020 <= x+ y <= 0.1500,10<-6> <= x <= 0.0200), dissolving the praseodymium raw material and the yttrium raw material and transferring the praseodymium raw material and the yttrium raw material into a mixed solution of nitrate, and dissolving the zirconium oxychloride octahydrate in the mixed solution; (2) adding a soluble salt and an organic fuel into the mixed solution obtained by the step (1), heating to dissolve the soluble salt and the organic fuel, heating and concentrating the solution into a sticky state and adding the concentrated material into a heating furnace cavity at a temperature of 400-1,000 DEG C and igniting; and (3) washing, filtering and drying a product. The powder particles prepared by the invention are spheres which are uniform in size and good in dispersion. The particle size is 2-6 nm; and a specific surface area can reach 318 m<2>.g<-1>. The preparation method is simple in process, low in equipment requirements and short in synthesis time, can form the phase in one step; and is low in energy consumption and low in cost.

Description

technical field [0001] The invention belongs to the field of biological ceramics, in particular to a preparation method of imitation tooth-colored yttrium-zirconium oxide nano ceramic powder. Background technique [0002] ZrO 2 Ceramic dental restorations have received great attention in recent years because of their good biocompatibility, chemical stability in the oral environment, thermal conductivity similar to natural teeth, and wear rates similar to natural tooth enamel. . Especially 3mol%Y 2 o 3 Doped ZrO 2 Ceramics are widely used in oral restorative materials because of their good mechanical properties. For oral restorative materials, in addition to the mechanical properties of the material, the color properties of the material must also be considered. However, the color of the zirconia underlying crown is single, and there is only one chalky color, which is monotonous compared with the base color of other full-tooth materials. For example, In-Ceram's alumina-...

AI Technical Summary

Problems solved by technology

The base crown has a single color, which makes the use of opaque porcelain essential. In order to obtain a better layering and better aesthetic effect, the thickness of the veneer porcelain will increase, which increases the amount of tooth preparation and protects the dental tissue. unfavorable

[0003] At present, there are mainly two methods of dyeing solution soaking and powder mixing bulk coloring in clinical practice, but both of them have disadvantages such as uneven coloring, poor repeatability, and colorants are easy to volatilize during sintering.

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