四方相钛酸钡纳米晶的制备及其表征

Preparation and Characterization on Square BaTiO_3 Nanocrystals

以Ti(OC4 H9) 4、H2 O2 和Ba(OH) 2 ·8H2 O为原料 ,在 180℃下溶剂热处理 2 4h ,制备了四方相钛酸钡纳米晶 ,XRD数据计算其格子常数a =3 .9899,c=4.0 3 2 5 ,c/a =1.0 10 7。

Using Ti(OC 4H 9) 4, H 2O 2 and Ba(OH) 2·8H 2O as raw materials,the square BaTiO 3 nanocrystals is prepared by solvent-thermal method at 180℃ with reaction time 24 h. The lattice constants of BaTiO 3 calculated from the XRD diffraction data are a 3.9899, c 4.0325, c/a 1.0107. The formation mechanism for square BaTiO 3 nanocrystal is also analyzed.