Abstract In the present work, the properties of triaxial porcelain for electrical applications were enhanced by consolidating the ceramic matrix using nanoscale particles. The influence of nano-titanium dioxide on the properties of uniaxially pressed samples sintering at 1250 °C was evaluated. Physical properties were determined by measuring the bulk density and porosity. The mechanical behavior was evaluated by compressive strength and microhardness. Microstructural analysis and phase analysis were carried out by scanning electron microscopy, X-ray diffraction, and Raman spectroscopy. The highest mechanical strength achieved by the nanostructured porcelain compositions was approximately 65% higher than that exhibited by the traditional siliceous porcelain. From a microstructure perspective, the nano-titanium dioxide particles developed compressive stresses (pre-stressing effect) in the vitreous phase, due to the different thermal expansion coefficients they display. Besides, the dispersed nano-titanium dioxide particles act as a strong barrier and thereby cause the deflection of crack when loading.

中文翻译：

---

纳米TiO2含量对电工瓷机械物理性能的影响

摘要 在目前的工作中，通过使用纳米级颗粒固结陶瓷基体来增强用于电气应用的三轴瓷的性能。评估了纳米二氧化钛对在 1250°C 下烧结的单轴压制样品性能的影响。通过测量堆积密度和孔隙率来确定物理性能。通过抗压强度和显微硬度评价机械性能。通过扫描电子显微镜、X 射线衍射和拉曼光谱进行显微结构分析和相分析。纳米结构瓷组合物达到的最高机械强度比传统硅质瓷表现出的机械强度高约 65%。从微观结构来看，由于它们显示出不同的热膨胀系数，纳米二氧化钛颗粒在玻璃相中产生了压缩应力（预应力效应）。此外，分散的纳米二氧化钛颗粒起到了强大的屏障作用，从而在加载时引起裂纹的偏转。