微波烧结与成份调控优化着色氧化锆透光率

Normally, the key to obtain a beautiful and natural dental restoration is the translucency and color of dental ceramic. At present, dental zirconia made from domestic zirconia powder cannot meet the clinical requirement of prosthesis at translucency and color. In this project, we construct the Y-Ce-TZP crystalline structure through selecting microwave sintering process, different additives and colorant ions in different valences to improve the translucency, color and mechanical properties of dental zirconia. The spectrophotometer will be used to measure the translucency and color of materials. The atomic force microscope and X-ray diffraction analysis technique will be used to observe the formation of crystal nucleus and the growth of phase transformation zone. In this project, we study the influencing rules of microwave sintering process, different additives and distribution of the colorants component on the translucency, color, mechanical properties and microstructure of dental zirconia. We will study the influencing rules of microwave sintering process on the size of grain and the particle size distribution and the influencing rules of the distribution of the coloring elements in polycrystalline zirconia on the crystalline structure. We will propose effect methods to control the translucency and color of dental zirconia in production. In conclusion, this project has important theoretical and practical value for dental zirconia with high standard of aesthetics and high strength to meet the demand of prosthodontics.

口腔修复用全瓷材料的半透明性和颜色是获得美观、自然牙齿修复体的关键。目前国产氧化锆粉制成牙科氧化锆材料不能满足临床对修复体半透性和颜色的要求。本课题针对牙科用氧化锆材料的半透明性、颜色及力学性能，选择微波烧结工艺、不同添加剂和不同价态的着色剂离子来构造Y-Ce-TZP晶相结构。采用分光光度计测定材料的半透明性和颜色，用原子力显微镜和X光衍射分析技术观察晶核的生成和相变区的生长。探讨微波烧结工艺、添加剂与着色剂的成份分配对氧化锆材料半透明性、颜色、力学性能和微观结构的影响规律，深入研究微波烧结工艺对晶粒大小和粒径分布的影响以及着色元素在多晶氧化锆中的分布及对晶相结构的影响。提出牙科氧化锆材料的半透明性、颜色在生产中有效的控制方法。对口腔医学需求的高标准美学、高强度的修复材料具有重要的理论意义和实际应用价值。

口腔修复用全瓷材料的半透明性和颜色是获得美观、自然牙齿修复体的关键。目前国产氧化锆粉制成牙科氧化锆材料不能满足临床对修复体半透性和颜色的要求。本课题针对牙科用氧化锆材料的半透明性、颜色及力学性能，选择微波烧结工艺、不同添加剂和不同价态的着色剂离子来构造 Y-Ce-TZP 晶相结构。采用分光光度计测定材料的半透明性和颜色，用原子力显微镜和 X 光衍射分析技术观察晶核的生成和相变区的生长。探讨微波烧结工艺、添加剂与着色剂的成份分配对氧化锆材料半透明性、颜色、力学性能和微观结构的影响规律，深入研究微波烧结工艺对晶粒大小和粒径分布的影响以及着色元素在多晶氧化锆中的分布及对晶相结构的影响。提出牙科氧化锆材料的半透明性、颜色在生产中有效的控制方法。对口腔医学需求的高标准美学、高强度的修复材料具有重要的理论意义和实际应用价值。