Scientific Research Publishing

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53523#.VMdF_yzQrzE Author(s)   Pratima Parashar Pandey *   Affiliation(s) Department of Materials Science, Mangalore University, Mangalagangotri, India . ABSTRACT Silver particulate thin films on softened polymer blends of Polystyrene (PS)/Poly(2-vinyl pyridine) (P2VP), PS/Poly(4-vinylpyridine) (P4VP), and Poly(vinylpyrollidone) (PVP)/P4VP at a rate of 0.4 nm/s held at a temperature of 457 K in vacuum of 8 × 10 -6 Torr by evaporation are deposited. These silver films were characterized by their electrical behavior, optical properties and Scanning electron microscopy (SEM). Silver films deposited on softened PS, and PVP give rise to a very high room temperature resistance approaching that of the substrate resistance due to the formation of a highly agglomerated structure. On the other hand, silver films on softened P2VP and P4VP gives rise to a room ...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52921#.VKygPsnQrzE Author(s)   L. H. Grigoryan 1 , R. H. Grigoryan 2   Affiliation(s) 1 Federal State Institution of Science, Institute of Problems of Chemical Physics RAS, Chernogolovka, Russia . 2 Federal State Institution of Science, Institute of Structural Macrokinetics RAS, Chernogolovka, Russia . ABSTRACT The research is devoted to the multicomponent system CaTiSiO5-YFeSnO5. The synthesis of solid solutions Ca 1-x Y x Ti 1-x Sn x Si 1-x Fe x O 5 (x = 0 - 1.0, Δx = 0.1) was conducted in low-temperature plasma of hydrogen-oxygen flame. It was found that ions Ca 2+ , Ti 4+ and Si 4+ in the molecule of titanit may be substituted with t ions Y 3+ , Fe 3+ and Sn 4+ . In this case, the system produces two phases of variable composition with broad regions of homogeneity. There were defined the boundaries of formed phases, crystallographic and electrical pa...