Ceramic composites of alumina (Al₂O₃), 3 mol% yittria stabilized zirconia (ZrO₂), Magnesia (MgO) and Titania (TiO₂) were produced and different physical and mechanical properties were characterized. This multicomponent toughened Al₂O₃ was also characterized by observing XRD and SEM. The weight percentages of ZrO₂ (15 wt%) and TiO₂ (0.5 wt%) were constant where the amount of MgO varied from 0 to 1.5 wt%. The batch compositions were properly weighed, dried, mixed with polyvinyle alcohol binder, again dried and pressed into 10 mm diameter shaped samples by uniaxial pressure of 160 MPa. The prepared green samples were sintered at 1450 °C, 1520 °C and 1590 °C for 5 h under pressureless condition. The effect of MgO addition and variation of sintering temperature was observed on the density, porosity, hardness, fracture toughness and diametral tensile strength of the sintered pellets. Hardness and fracture toughness were calculated by indentation technique. SEM and XRD were used to characterize the microstructure and phases present in the sintered ceramic composites. Results show that, the addition of MgO upto 1% influences all the physical and mechanical properties to improve, where further addition of MgO shows no fruitful effect. From the phase analysis and rietveld analysis one extra phase of spinel (MgAl₂O₄) founded when MgO added more than 0.5%. The perfect sintering temperature was found 1520 °C. Further increasing the sintering temperature causes structural imperfection of the composites and the physical and mechanical properties diminished at the sintering temperature at about 1600 °C.

制备了氧化铝（Al ₂ O ₃），3 mol％的氧化钇稳定的氧化锆（ZrO ₂），氧化镁（MgO）和二氧化钛（TiO ₂）的陶瓷复合材料，并表征了不同的物理和机械性能。该多组分增韧的Al ₂ O _3的特征还在于观察XRD和SEM。ZrO ₂（15 wt％）和TiO ₂的重量百分比MgO的含量在0至1.5 wt％之间变化时（0.5 wt％）是恒定的。适当地称量批料组合物，干燥，与聚乙烯醇粘合剂混合，再次干燥并通过160MPa的单轴压力压制成直径为10mm的样品。制备的生坯样品在无压条件下于1450°C，1520°C和1590°C烧结5小时。观察到添加MgO和改变烧结温度对烧结颗粒的密度，孔隙率，硬度，断裂韧性和径向拉伸强度的影响。硬度和断裂韧性通过压痕技术计算。SEM和XRD用于表征烧结陶瓷复合材料中的微观结构和相。结果表明，最多添加1％的MgO会影响所有物理和机械性能的改善，进一步添加MgO则没有效果。从相分析和倒角分析中，再增加一个尖晶石相（MgAl₂ O ₄）成立时，MgO添加量超过0.5％。发现最佳烧结温度为1520℃。进一步提高烧结温度导致复合材料的结构缺陷，并且在约1600℃的烧结温度下物理和机械性能降低。