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CN-121974686-A - Fluorescent zirconia composition, preparation method and application of fluorescent zirconia ceramic block

CN121974686ACN 121974686 ACN121974686 ACN 121974686ACN-121974686-A

Abstract

The invention provides a fluorescent zirconia composition, a preparation method and application of a fluorescent zirconia ceramic block, wherein the fluorescent zirconia composition comprises, by mass, 90-95% of inorganic powder, 3-10% of organic matters and 1-5% of fluorescent components. Wherein the inorganic powder comprises zirconium oxide, hafnium oxide, aluminum oxide, yttrium oxide, titanium oxide and manganese oxide. The organic matter comprises a dispersing agent, an adhesive, a plasticizer and a defoaming agent. The fluorescent component includes cerium oxide, iron oxide, and erbium oxide. Through the mutual matching of the components, the obtained fluorescent zirconia ceramic block has a fluorescent effect and enhanced toughness. Moreover, the preparation method is simple, convenient to operate and suitable for large-scale industrial production.

Inventors

  • WANG BIN
  • AI ZHIWEI
  • YUAN HUAN

Assignees

  • 湖南皓瓷材料科技有限公司

Dates

Publication Date
20260505
Application Date
20251221

Claims (10)

  1. 1. The fluorescent zirconia composition is characterized by comprising, by mass, 90-95% of inorganic powder, 3-10% of organic matters and 1-5% of fluorescent components; Wherein the inorganic powder comprises zirconium oxide, hafnium oxide, aluminum oxide, yttrium oxide, titanium oxide and manganese oxide; the organic matters comprise dispersing agents, adhesives, plasticizers and defoamers; the fluorescent component includes cerium oxide, iron oxide, and erbium oxide.
  2. 2. The composition of fluorescent zirconia according to claim 1, wherein the inorganic powder comprises, in mass fraction, 85 to 90% zirconia, 3 to 5% hafnium oxide, 0.1 to 1% alumina, 4 to 6% yttria, 0.1 to 0.5% titania, 0.05 to 0.2% manganese oxide; Based on the total mass of the fluorescent component, the fluorescent component comprises 88-92% of cerium oxide, 4-6% of iron oxide and 4-6% of erbium oxide in percentage by mass.
  3. 3. The fluorescent zirconia composition of claim 1 wherein the fluorescent zirconia composition is a solid or a liquid; in the liquid, the total mass of the inorganic powder and the fluorescent component accounts for 70-80% of the total mass of the liquid.
  4. 4. The fluorescent zirconia composition of claim 1 wherein the dispersant comprises one or more of ammonia citrate, polyethylene glycol, sodium polyacrylate; The content of the dispersing agent in the organic matters is 0.1-1%; The adhesive comprises one or more of polyvinyl alcohol, hydroxypropyl methyl cellulose and polyvinyl chloride; The content of the adhesive in the organic matters is 0.5-1.5%; the plasticizer comprises ethylene glycol; The content of the plasticizer in the organic matters is 0.5-1.5%; the defoamer comprises polyether high molecular compounds; the content of the defoaming agent in the organic matters is 0.05-0.15%.
  5. 5. The preparation method of the fluorescent zirconia ceramic block is characterized by comprising the following steps: S1, providing inorganic powder, organic matters and fluorescent components in the fluorescent zirconia composition according to any one of claims 1-4; s2, mixing and grinding the inorganic powder, the fluorescent component and water uniformly, and then adding the organic matters to stir to obtain slurry; s3, sieving the slurry, injecting the sieved slurry into a mold, performing first drying treatment at room temperature, and demolding to obtain a biscuit; S4, carrying out second drying treatment on the biscuit, and then sintering to obtain the fluorescent zirconia ceramic block; wherein the mesh number of the sieving is 200-400 mesh.
  6. 6. The method for preparing a fluorescent zirconia ceramic block according to claim 5, wherein the grinding time is 3-6 hours; the average grain diameter after uniform grinding is 0.1-0.5 mu m.
  7. 7. The method for preparing a fluorescent zirconia ceramic block according to claim 5, wherein the temperature of the second drying treatment is 55-75 ℃ and the duration of the second drying treatment is 4-8 hours.
  8. 8. The method for preparing the fluorescent zirconia ceramic block according to claim 5, wherein the sintering step comprises the steps of heating the biscuit subjected to the second drying treatment to 1050-1100 ℃ at 1-3 ℃ per min, preserving heat for 60-120 min, heating to 1060-1100 ℃ at 3-6 ℃ per min, preserving heat for 30-60 min, heating to 1450-1550 ℃ at 1-3 ℃ per min, and preserving heat for 60-120 min.
  9. 9. A fluorescent zirconia ceramic block according to any one of claims 1 to 4 or prepared by the preparation method according to any one of claims 5 to 8, wherein the toughness of the fluorescent zirconia ceramic block is 6.5 to 10.5 mpa-m 1/2 .
  10. 10. Use of a fluorescent zirconia ceramic block according to claim 9 for the preparation of a dental restoration.

Description

Fluorescent zirconia composition, preparation method and application of fluorescent zirconia ceramic block Technical Field The invention relates to the field of zirconia ceramic blocks, in particular to a fluorescent zirconia composition, a preparation method and application of a fluorescent zirconia ceramic block. Background With the development of oral restoration, the goal of all-ceramic restoration is not limited to simply restoring the shape and function of teeth, but is continuously advancing toward a highly bionic and aesthetic nature. The ideal dental restoration not only needs to match the hue, brightness and saturation with the needs of the adjacent teeth and patients, but also needs to accurately reproduce the complex second optical characteristics of the natural teeth, such as semi-permeability, turbidity, halation, surface glossiness and the like. These features are critical in determining whether the restoration can exhibit natural, vivid visual effects in the complex optical environment of the oral cavity. Among the numerous all-ceramic materials, zirconia ceramics are widely used for their excellent mechanical strength and biocompatibility. However, the general lack of fluorescence effects of the existing zirconia-based porcelain materials severely limits their application in aesthetic areas, especially in a variety of lighting environments, where their optical properties are difficult to compare favorably with natural teeth. Natural teeth emit unique light purple fluorescence when excited by ultraviolet light or short-wave blue light, and the characteristic is not obvious when the light is sufficient in the daytime, but is important to maintain the visual existence sense and natural appearance of the teeth in dim or special light source environments such as the night. The prior art mainly improves the color and the transmittance of the zirconia by means of surface decoration porcelain, dyeing or improving sintering technology, etc., but the methods have certain limitations and can not fundamentally solve the problem of insufficient optical performance of the zirconia material. Based on the above, the invention provides a fluorescent zirconia composition, a preparation method and application of a fluorescent zirconia ceramic block, and aims to solve the technical problems that the existing zirconia ceramic block lacks a fluorescent effect and has insufficient toughness. Disclosure of Invention The invention mainly aims to provide a fluorescent zirconia composition, a preparation method and application of a fluorescent zirconia ceramic block, and aims to solve the technical problems that the existing zirconia ceramic block lacks a fluorescent effect and is insufficient in toughness. The invention provides a fluorescent zirconia composition, which comprises, by mass, 90-95% of inorganic powder, 3-10% of organic matters and 1-5% of fluorescent components. Wherein the inorganic powder comprises zirconium oxide, hafnium oxide, aluminum oxide, yttrium oxide, titanium oxide and manganese oxide. The organic matter comprises a dispersing agent, an adhesive, a plasticizer and a defoaming agent. The fluorescent component includes cerium oxide, iron oxide, and erbium oxide. According to the embodiment of the application, the inorganic powder comprises, by mass fraction, based on the total mass of the inorganic powder, 85-90% of zirconium oxide, 3-5% of hafnium oxide, 0.1-1% of aluminum oxide, 4-6% of yttrium oxide, 0.1-0.5% of titanium oxide and 0.05-0.2% of manganese oxide. Based on the total mass of the fluorescent component, the fluorescent component comprises 88-92% of cerium oxide, 4-6% of iron oxide and 4-6% of erbium oxide in percentage by mass. According to an embodiment of the present application, in the slurry of the fluorescent zirconia ceramic block, the composition of the fluorescent zirconia is solid or liquid. In the liquid, the total mass of the inorganic powder and the fluorescent component accounts for 70-80% of the total mass of the liquid. According to an embodiment of the present application, the dispersant comprises one or more of ammonium citrate, polyethylene glycol, sodium polyacrylate. The content of the dispersing agent in the organic matters is 0.1-1%. The adhesive comprises one or more of polyvinyl alcohol, hydroxypropyl methyl cellulose and polyvinyl chloride. The content of the adhesive in the organic matters is 0.5-1.5%. The plasticizer includes ethylene glycol. The content of the plasticizer in the organic matters is 0.5-1.5%. The defoamer comprises polyether high molecular compounds. The content of the defoaming agent in the organic matters is 0.05-0.15%. According to the embodiment of the application, the toughness of the fluorescent zirconia ceramic block is 6.5-10.5 MPa m 1/2. The invention also provides a preparation method of the fluorescent zirconia ceramic block, which comprises the following steps: s1, providing inorganic powder, organic matters and fluorescent