【摘要】 采用 0 0 5mol/L的前驱体溶液 ,利用溶胶 凝胶法成功制备了室温下具有优良铁电性质的Ba0 .8Sr0 .2 TiO3(BST)薄膜 .X射线衍射分析表明 ,制得的BST薄膜室温下呈四方相 ,场发射扫描电子显微观测显示BST薄膜表面平整、致密、无裂纹出现 ,薄膜晶粒呈柱状结构、尺寸在 15 0nm左右 .电学测量表明制备的BST薄膜室温下具有优良的铁电性能 .薄膜的剩余极化Pr 约为 3 5 μC/cm2 ,矫顽电场Ec 约为 5 3kV/cm .薄膜的绝缘性能也较好 .这为利用溶胶 凝胶法制备BST薄膜进一步研制室温红外探测器和室温红外焦平面列阵创造了条件更多还原

【Abstract】 Quality Ba 0.8 Sr\-\{0.2\}TiO\-3 (BST) thin films with a remnant polarization of about 3.5?μC/cm 2,and a coercive field of about 53?kV/cm have been successfully prepared by a sol\|gel processing using a 0.05?mol/L precursor solution.X\|ray diffraction and field emission scanning electron microscope investigations show that the BST films exhibit a tetragonal structure ( c/a =1.009) and consist dominantly of large columnar grains of about 150?nm in diameter.The observed good ferroelectricity and insulating property render the sol\|gel derived BST thin films promising for uncooled infrared detector and thermal imaging applications.更多还原