对通过高能机械研磨制备的 CeO 2 –ZrO 2 粉末催化剂样品进行中子衍射测量。在所检查的整个组成范围内都证明了固溶体的形成。通过 Rietveld 方法进行的定量相评估表明,在低 CeO 2 含量下形成四方结构,而在高 CeO 2 负载下立方固溶体是稳定形式。此外,在中间组成(50 mol% CeO 2 )下观察到具有统一轴比和氧亚晶格内部变形的假立方或四方t”电池。高达 1000 °C 的热退火显示了晶胞参数的膨胀;对于成分 Ce x Zr 1− x O 2 ( x
Some novel (phenyl-diazenyl)phenols (4a-m) were designed and synthesized to be evaluated for their antibacterial activity. Starting from an active previously-synthesized azobenzene chosen as lead compound, we introduced some modifications and optimization of the structure, in order to improve solubility and drug conveyance. Structures of all newly-synthesized compounds were confirmed by ¹H nuclear
Neutron diffraction measurements were carried out on samples of CeO 2 –ZrO 2 powder catalysts prepared by high-energymechanicalmilling. The formation of solid solution was evidenced across the entire composition range examined. Quantitative phase evaluation by the Rietveld method indicated formation of tetragonal structure for low CeO 2 content, whereas cubic solid solutions were the stable form
对通过高能机械研磨制备的 CeO 2 –ZrO 2 粉末催化剂样品进行中子衍射测量。在所检查的整个组成范围内都证明了固溶体的形成。通过 Rietveld 方法进行的定量相评估表明,在低 CeO 2 含量下形成四方结构,而在高 CeO 2 负载下立方固溶体是稳定形式。此外,在中间组成(50 mol% CeO 2 )下观察到具有统一轴比和氧亚晶格内部变形的假立方或四方t”电池。高达 1000 °C 的热退火显示了晶胞参数的膨胀;对于成分 Ce x Zr 1− x O 2 ( x