Porcelain insulators have prodigious importance in electricity transmission and distribution network because of their high dielectric constant, electrical resistivity, and mechanical strength and these properties are closely connected to the microstructural details of the insulator. Three different porcelain insulators (Sample A, B and C) were reported in the present work. X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM), three point bending test and density and pore analysis were carried out to investigate the structural and mechanical properties of various insulators. The analysis confirmed that the porcelain insulators are made of industrial alumina, quartz, clay, and feldspar having amorphous as well as crystalline phase in the body. The porosity, density, and bending strength were also calculated and a correlation was developed between mechanical strength of the insulator and various physio-chemical and microstructural properties. Sample A showed the highest value of bending strength i.e. 207.20 MPa and sample C the lowest value of 112.18 MPa while sample B demonstrated the intermediate value of 170.98 MPa. To formulate high strength porcelain insulators, it was concluded that the amount of amorphous phase, dispersed corundum, and mullite content are key factors to control the mechanical strength of porcelain insulators.

瓷绝缘子由于其高介电常数、电阻率和机械强度而在输配电网络中具有巨大的重要性，并且这些特性与绝缘子的微观结构细节密切相关。目前的工作报告了三种不同的瓷绝缘子（样品 A、B 和 C）。通过X射线荧光（XRF）、X射线衍射（XRD）、扫描电子显微镜（SEM）、三点弯曲试验以及密度和孔隙分析来研究各种绝缘子的结构和机械性能。分析证实，瓷绝缘子由工业氧化铝、石英、粘土和长石制成，在体内具有非晶相和结晶相。孔隙率、密度、还计算了弯曲强度和绝缘子的机械强度与各种物理化学和微观结构特性之间的相关性。样品 A 的弯曲强度最高值，即 207.20 MPa，样品 C 的最低值是 112.18 MPa，而样品 B 的中间值是 170.98 MPa。为配制高强度瓷绝缘子，得出结论：非晶相量、分散的刚玉和莫来石含量是控制瓷绝缘子机械强度的关键因素。18 MPa 而样品 B 显示中间值 170.98 MPa。为配制高强度瓷绝缘子，得出结论：非晶相量、分散的刚玉和莫来石含量是控制瓷绝缘子机械强度的关键因素。18 MPa 而样品 B 显示中间值 170.98 MPa。为配制高强度瓷绝缘子，得出结论：非晶相量、分散的刚玉和莫来石含量是控制瓷绝缘子机械强度的关键因素。