Ceramic material powder used for denture preparation and preparation method of ceramic material powder

Abstract

The invention relates to a material used for a denture, and in particular relates to a ceramic material powder used for denture preparation. The ceramic material powder comprises 90%-95% of stable tetragonal zirconia, and 2.5-3.49% of yttrium oxide used as a stabilizer, wherein a precursor is obtained by coprecipitation reaction of the ceramic material powder; the precursor is sequentially subjected to hydrothermal reaction and spray drying to obtain powder with bending strength greater than 600MPa. A method for preparing the powder comprises the following steps: a, forming 90%-95% of tetragonal zirconia, and 2.5-3.49% of yttrium oxide used as the stabilizer; b, carrying out hydrothermal reaction on the precursor produced in the step a, wherein the reaction temperature is 120-250 DEG C and the reaction time in a high-pressure reactor is 24-48 hours; c, adding a 2-5% polyvinyl alcohol solution into a product obtained in b as adhesive; d, carrying out centrifugal spray granulation on a product obtained in c at hot air temperature of 200-350 DEG C. Through the steps, high-quality ceramic powder with high bending strength greater than 600MPa, high fracture toughness, good chemical stability and good biocompatibility can be obtained.

Description

technical field [0001] The invention relates to a material used for dentures, in particular to a zirconium-containing ceramic material powder used for preparing dentures and a preparation method thereof. Background technique [0002] The development of oral restoration is inseparable from the development of oral materials and techniques. Denture restoration materials mainly include ceramics, resins and metal materials. However, the traditional glass-ceramic-based and alumina-based ceramic materials themselves are not strong enough and brittle, easy to break, which limits their use in oral restorations. [0003] With the rapid development of current oral restorative technology, all-ceramic materials have become the most widely used materials due to their good biocompatibility, corrosion resistance, dielectric properties, thermal stability and excellent aesthetic effects. Dental restoration materials. Zirconia is currently the all-ceramic material with the best mechanical pr...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above problems, in view of the disadvantages of the prior art that the reaction is not easy to control, the production process is complicated, the powder is poorly dispersed, easy to agglomerate, and the strength does not meet the requirements, a high flexural strength ( Greater than 600MPa), high fracture toughness (higher than structural ceramics such as alumina), good chemical stability (does not react with liquids in the human body, acid and alkali corrosion resistance), good biocompatibility (antithrombosis and sterilization) high-quality ceramic powder

Images