用溶胶凝胶法合成了具有高比表面积的纳米粒子 Ni O,用固相合成法制备了 Ni O-YSZ复合材料 .阻抗谱测试表明 ,含纳米尺寸 Ni O的复合材料的极化电阻更小 ,电导率更高 .以质量分数为 5 5 %的 Ni O-YSZ为阳极材料 ,并将其封接成单电池 ....用溶胶凝胶法合成了具有高比表面积的纳米粒子 Ni O,用固相合成法制备了 Ni O-YSZ复合材料 .阻抗谱测试表明 ,含纳米尺寸 Ni O的复合材料的极化电阻更小 ,电导率更高 .以质量分数为 5 5 %的 Ni O-YSZ为阳极材料 ,并将其封接成单电池 .结果表明 ,含纳米尺寸 Ni O的复合阳极制成的单电池 ,其输出功率更高 ,短路电流更大 .通过减小 Ni O晶粒尺寸 ,可增大阳极三相反应界面长度 。展开更多
A series of samples Ba_(1+x)Nd_(1-x)FeTiO_(6)(x=0.0-0.5)were prepared by solid state reactions and characterized by x-ray diffraction and Mössbauer spectroscopy.All samples crystallized in cubic structure.A rando...A series of samples Ba_(1+x)Nd_(1-x)FeTiO_(6)(x=0.0-0.5)were prepared by solid state reactions and characterized by x-ray diffraction and Mössbauer spectroscopy.All samples crystallized in cubic structure.A random distribution of Fe and Ti ions at octahedral sites was shown.^(57)Fe Mössbauer spectra of the samples consisted of a quadrupole doublet.The quadrupole splittings obtained by fitting the experimental data were larger than 0.5mm/s,indicating local structure distortions in these cubic phases.The relationship between quadrupole splitting and dopant content x of Ba_(1+x)Nd_(1-x)FeTiO_(6) is discussed.展开更多
文摘用溶胶凝胶法合成了具有高比表面积的纳米粒子 Ni O,用固相合成法制备了 Ni O-YSZ复合材料 .阻抗谱测试表明 ,含纳米尺寸 Ni O的复合材料的极化电阻更小 ,电导率更高 .以质量分数为 5 5 %的 Ni O-YSZ为阳极材料 ,并将其封接成单电池 .结果表明 ,含纳米尺寸 Ni O的复合阳极制成的单电池 ,其输出功率更高 ,短路电流更大 .通过减小 Ni O晶粒尺寸 ,可增大阳极三相反应界面长度 。
文摘A series of samples Ba_(1+x)Nd_(1-x)FeTiO_(6)(x=0.0-0.5)were prepared by solid state reactions and characterized by x-ray diffraction and Mössbauer spectroscopy.All samples crystallized in cubic structure.A random distribution of Fe and Ti ions at octahedral sites was shown.^(57)Fe Mössbauer spectra of the samples consisted of a quadrupole doublet.The quadrupole splittings obtained by fitting the experimental data were larger than 0.5mm/s,indicating local structure distortions in these cubic phases.The relationship between quadrupole splitting and dopant content x of Ba_(1+x)Nd_(1-x)FeTiO_(6) is discussed.
