Magnesia-Zirconia Rods

Zirconia is an exceptional high-temperature ceramic material; however, pure zirconia undergoes phase transformation at elevated temperatures, resulting in volume expansion and strength deterioration. To address this issue, a certain amount of magnesium oxide (MgO) is typically incorporated into zirconia to form a magnesia-zirconia composite material. Magnesium oxide effectively stabilizes the cubic phase structure of zirconia, thereby suppressing phase transformation at high temperatures and preventing volume expansion. Additionally, by refining the grains and achieving a uniform microstructure, it enhances the material's strength and toughness. Magnesia-zirconia composites exhibit superior thermal shock stability and can withstand more severe temperature fluctuations without fracturing due to the stabilizing effect of magnesium oxide on the phase structure of zirconia as well as excellent thermal expansion matching between the two components. The addition of magnesium oxide promotes sintering of zirconia, lowers sintering temperature requirements, and enables dense sintered bodies to be obtained. This characteristic is advantageous for producing high-performance magnesia-zirconia ceramic products with broad application prospects in fields such as high-temperature structural components, refractory materials, electronic ceramics, aerospace industry applications, semiconductor manufacturing processes.