In the present study, total quartz content (30 wt%) of a standard porcelain body was progressively substituted with two different kinds of aluminas (active alumina and calcined alumina) keeping active alumina constant at 5 wt% and varying calcined alumina content to the extent of 5–25 wt%. The alumina incorporated compositions (AP1 to AP7), along with the standard quartz containing porcelain body (SP0), were processed following common ceramic processing techniques. Two types of forming techniques were used to make samples, namely extrusion of plastic mass to get cylinder of desired dimensions and the other one was hydraulic compaction to produce rectangular bars. The extruded and compacted samples were properly dried and then heated in an electrically operated furnace in the temperature range of 1170–1260 °C. The fully densified samples heated at 1260 °C were subjected to various tests, namely phase identification by X-ray diffraction (XRD) pattern studies; scanning electron microscopic (SEM) analysis; and measurement for electrical properties such as dielectric strength (kV/mm), dielectric loss (tanδ), electrical resistivity (ohm-cm), and dielectric constant to confirm suitability of the samples for application in high-tension power transmission system. The results revealed that the body AP6, wherein 25 wt% quartz was substituted by 5 wt% active alumina and 20 wt% calcined alumina and heated at 1260 °C, may be considered the most suitable sample for porcelain insulator.

在本研究中，用两种不同的氧化铝（活性氧化铝和煅烧氧化铝）逐渐取代标准瓷体的总石英含量（30 wt％），以保持活性氧化铝恒定在5 wt％并在一定程度上改变煅烧氧化铝的含量5-25 wt％。按照常规陶瓷加工技术加工掺入氧化铝的组合物（AP1至AP7）以及标准的含石英瓷体（SP0）。两种类型的成型技术用于制作样品，一种是挤出塑料块以获得所需尺寸的圆柱体，另一种是水力压实以生产矩形棒。挤压并压实的样品经过适当干燥，然后在电动炉中在1170-1260°C的温度范围内加热。加热至1260°C的完全致密化样品经过各种测试，即通过X射线衍射（XRD）模式研究进行相识别；扫描电子显微镜（SEM）分析；并测量电性能，例如介电强度（kV / mm），介电损耗（tanδ），电阻率（ohm-cm）和介电常数，以确认样品适用于高压输电系统。结果表明，其中AP5（其中25 wt％的石英被5 wt％的活性氧化铝和20 wt％的煅烧氧化铝代替并在1260°C加热）可以被认为是最适合用于瓷绝缘子的样品。