Prosthodontic material based on nanometer zirconia and alumina composite ceramic

A nano-zirconia, dental prosthesis technology, used in ceramic products, dental preparations, dental prostheses, etc., can solve the problems of difficult to form close-packed blanks, limited application, poor fracture toughness, etc., to reduce sintering temperature, optimize mechanical performance, the effect of improving toughness

Inactive Publication Date: 2019-09-03
南京赛诺特斯材料科技有限公司
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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 se

Method used

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Embodiment approach

[0024] According to a preferred embodiment, the preparation method of the oral restorative material at least includes the following steps: adjusting the pH value of the mixed solution after mixing accurately weighed zirconium dioxide, yttrium metal stabilizer and deionized water according to a certain ratio , make it dry under the condition that the pH value is not less than 7, and carry out high-temperature sintering to obtain stable-phase nano-zirconia powder doped with yttrium metal. Nano zirconia has the characteristics of strong thermal shock resistance, high temperature resistance, good chemical stability, and outstanding material composition. By compounding nano zirconia with other materials such as aluminum oxide powder, nano zirconia is used as a dispersion Phase, can greatly improve the performance parameters of the material, improve its fracture toughness, flexural strength, etc.

[0025] According to a preferred embodiment, the preparation method of the oral restor...

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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...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/48C04B35/622C04B38/08A61K6/02A61L27/10
CPCC04B35/10C04B35/48C04B35/622C04B38/08A61L27/105C04B2235/36A61L2400/12A61L2430/12
Inventor 孔令兵张天舒
Owner 南京赛诺特斯材料科技有限公司
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