PROCESS FOR PRODUCING A COLORED DENTAL ZIRCONIA ARTICLE

• Main Authors: JAHNS MICHAEL, GOETZINGER MARTIN, SCHMITTNER SYBILLE
• Format: Patent
• Language: Chinese; English
• Published: 15.10.2021
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; GLASS; HUMAN NECESSITIES; HYGIENE; JOINING GLASS TO GLASS OR OTHER MATERIALS; LIME, MAGNESIA; MEDICAL OR VETERINARY SCIENCE; METALLURGY; MINERAL OR SLAG WOOL; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; REFRACTORIES; SLAG; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TREATMENT OF NATURAL STONE

The invention relates to a process of producing a dental zirconia article, the process comprising the step of sintering a porous dental zirconia article, the sintering comprising a heat-treatment segment A characterized by a heating rate of at least 3 K/sec up to a temperature of at least 1,200 DEG C, the porous dental zirconia article being composed of a zirconia material containing 6.0 to 8.0 wt.% yttria, 0.05 to 0.12 wt.% alumina and comprising a coloring component containing Tb, the porous dental zirconia article being essentially free of Fe components. The invention also relates to a process comprising the additional step of applying a glazing composition to the outer surface of the porous zirconia article before the heat-treatment or sintering is conducted. 本发明涉及一种制备牙科氧化锆制品的方法，该方法包括烧结多孔牙科氧化锆制品的步骤，该烧结包括热处理段A，热处理段A的特征在于以至少3K/秒的加热速率一直加热到至少1,200℃的温度，多孔牙科氧化锆制品包含含有6.0重量％至8.0重量％的氧化钇、0.05重量％至0.12重量％的氧化铝的氧化锆材料，并且包含含有Tb的着色组分，该多孔牙科氧化锆制品基本上不含Fe组分。本发明还涉及一种方法，该方法包括在进行热处理或烧结之前将上釉组合物施加到多孔氧化锆制品的外表面的附加步骤。