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目的 渗透陶瓷是一种新型的高强度全瓷冠桥修复材料。本实验研究了渗透陶瓷在氧化铝预烧结前后及四种玻璃料渗透后陶瓷样本的SEM表现,旨在探讨高强度的可能原因,以及微观结构与强度的关系。方法 制取氧化铝预烧结前、后及GI—Ⅰ型、GI-Ⅱ型镧系、GI—Ⅱ型铈系、Vita In-ceram玻璃渗透后的样本各1个,进行SEM观察。结果 Vita In-ceram氧化铝粉的颗粒大小具有多相性,其中大颗粒粒度为3—5μm,小颗粒粒度为0.1～0.5μm,烧结以后小颗粒的数目略减少,氧化铝基体的致密度稍增加;4种玻璃渗透以后样本的断面SEM相似。渗透后氧化铝颗粒稍长大,形态有向氧化铝的天然晶型斜方型转化的趋势。结论 玻璃渗透过程中,可能发生了小颗粒氧化铝的溶解再晶化过程。强度相同的四种渗透陶瓷SEM表现也相似。
The purpose of infiltration of ceramic is a new type of high strength all-ceramic crown bridge repair material. In this experiment, the SEM of ceramic samples before and after infiltration ceramic pre-sintering alumina and the infiltration of four glass frits were studied to explore the possible causes of high strength and the relationship between microstructure and strength. Methods One sample before and after pre-calcination of alumina and one sample of GI-Ⅰ, GI-Ⅱ lanthanide, GI-Ⅱ cerium-based and Vita In-ceram glass infiltration were prepared and observed by SEM. Results The particle size of Vita In-ceram alumina powder was heterogeneous. The large particle size was 3-5μm, the small particle size was 0.1-0.5μm. After sintering, the number of small particles slightly decreased and the density of alumina matrix slightly increased The SEM images of the samples after four kinds of glass infiltration were similar. After infiltration, the alumina particles grow slightly, and the morphology tends to the orthorhombic transformation of natural crystalline form of alumina. Conclusion During the infiltration of glass, dissolution and recrystallization of small particle alumina may occur. The same strength of the four osmotic ceramic SEM performance is also similar.