Under the sintering condition of normal pressure, the su-perfine, high density tetragonal zirconia polycrystalline ceramics were prepared by means of doping 3 mol% Y2O3 and other trace oxides which act as the grain st...Under the sintering condition of normal pressure, the su-perfine, high density tetragonal zirconia polycrystalline ceramics were prepared by means of doping 3 mol% Y2O3 and other trace oxides which act as the grain stabilizing agent and the grain growing in-hibitor. By the density measurements and analyses of XRD, SEM and TEMj etc. it was studied that the microstructure of ZrOz system poly-crystalline ceramics is affected by doping trace oxides of CuO. FezO3 and SiO2.展开更多
SHS method with reductive process was used to synthesize TiB2 ceramic powder from B2O3-TiO2-Mg system. X-ray diffraction, SEM and Image analysis were used to analyse microstructure of TiB2 powder and compare with micr...SHS method with reductive process was used to synthesize TiB2 ceramic powder from B2O3-TiO2-Mg system. X-ray diffraction, SEM and Image analysis were used to analyse microstructure of TiB2 powder and compare with microstructure of TiB, fabricated by SHS elements syn-thesis from Ti+B system. The results show that TiB? powder fabricated by SHS reductive synthesis is finer (about 1. 5?m) ,uni former and free-agglomerate.展开更多
文摘Under the sintering condition of normal pressure, the su-perfine, high density tetragonal zirconia polycrystalline ceramics were prepared by means of doping 3 mol% Y2O3 and other trace oxides which act as the grain stabilizing agent and the grain growing in-hibitor. By the density measurements and analyses of XRD, SEM and TEMj etc. it was studied that the microstructure of ZrOz system poly-crystalline ceramics is affected by doping trace oxides of CuO. FezO3 and SiO2.
文摘SHS method with reductive process was used to synthesize TiB2 ceramic powder from B2O3-TiO2-Mg system. X-ray diffraction, SEM and Image analysis were used to analyse microstructure of TiB2 powder and compare with microstructure of TiB, fabricated by SHS elements syn-thesis from Ti+B system. The results show that TiB? powder fabricated by SHS reductive synthesis is finer (about 1. 5?m) ,uni former and free-agglomerate.
