Prosthodontic material based on nanometer zirconia and alumina composite ceramic

Abstract

The invention relates to a prosthodontic material based on a nanometer zirconia and alumina composite ceramic, wherein the prosthodontic material is prepared from the following components by weight: 10-40 parts of alumina having a particle size of less than or equal to micrometer, 6-12 parts of alumina having a particle size of more than or equal to nanometer, 20-50 parts of zirconia having a particle size of more than or equal to nanometer, and 31-52 parts of a ceramic glass having a micro-pore size of more than or equal to nanometer. The preparation method comprises: mixing the components according to a certain ratio in the presence of a certain amount of a solvent or in the absence of a solvent, carrying out mixing ball milling or sand milling on the obtained mixture, carrying out centrifugal infiltration grouting to form a billet, and sintering the dried billet at a high temperature under a high pressure to obtain the prosthodontic material based on the nanometer zirconia and alumina composite ceramic.

Description

technical field [0001] The invention relates to the field of inorganic composite materials, in particular to an oral restorative material based on nanometer zirconia and alumina composite ceramics. Background technique [0002] Ceramic materials are currently artificial materials that can reproduce the shape, color and luster (including fluorescence and opalescence) of natural teeth to the greatest extent. Especially zirconia (ZrO 2 ) Ceramics have significant advantages in dental restoration due to their excellent performance. Among them, bioceramics refers to a class of ceramic materials with specific biological or physiological functions. Due to the advantages of good biocompatibility, affinity with biological tissues, corrosion resistance, sterilization and physical and chemical stability, bioceramic materials occupy an increasingly important position in the field of oral cavity. Dental all-ceramic materials can be divided into alumina-based ceramics, zirconia-based c...

AI Technical Summary

Problems solved by technology

[0007] The above patents all use nano-powders such as alumina and zirconia to make high-strength ceramic materials, but due to the surface charge of the nano-powder, the finer the powder particles, the more serious the surface charge, and the mutual repulsion between the powders. Difficult to form close-packed blanks, poor fracture toughness, and large deformation limit its application in oral restorative materials