Search

A focussed ion beam can change the structural, morphological, and electrical properties of polymer composites. In this work mechanical mixing technique is used to develop CaCu3Ti4O12/CoFe2O4/epoxy composites with CCTO loading (50wt%, 35wt%, 25wt%, and 15wt%). These composites were irradiated with 120 MeV Au+ beam at a constant fluence of 6 × 1012 ions/cm2 and their dielectric, morphological properties were investigated. The comprehensive examination of results revealed significant changes in surface morphology (polymer degradation, and rifts). The dielectric constant and dielectric loss of prepared composites was found to be ~ 35 and ~ 1.2, respectively. The hardness of composites was observed ~ 99 after irradiation. Ion irradiation induced physiochemical changes due to solid-ion interaction, which improvise composites applicability in microelectronic devices, and electromagnetic shields. Moreover, the mechanism of solid-ion interaction is conferred in the text. [ABSTRACT FROM AUTHOR]

Novel yttrium oxide-based orange-red emanative BaSrY4(1−x)Sm4xO8 (x = 1.0–6.0 mol%) nanopowder were manufactured by ecologically benign and less energy consuming urea combustion methodology. Crystal structure investigations reported the orthorhombic symmetry type with Pnma (62) phase group. Nano-range of 25–40 nm and agglomerated morphology of the developed crystal were known by performing transmission and scanning electron microscopy. EDAX (energy dispersive X-ray analysis) results traced the uniform elemental composition of the nanomaterials. The manufactured materials depicted the fine orange-red band at 607 nm via 4G5/2 → 6H7/2 typical transition. Optical investigations revealed the wide Egap (band gap) values of BaSrY3.88Sm0.12O8 (5.25 eV) and BaSrY4O8 (5.79 eV). Reliance of the glowing intensity of the manufactured nanocrystals on activator (Sm3+) amount proclaimed the BaSrY3.88Sm0.12O8 as most alluring one, reporting CIE coordinates (0.580, 0.418), 96.31% color purity, 1667 K CCT (correlated color temperature), and 54.8% quantum efficiency. These magnificent results certified the relevancy of the targeted nanocrystals as a novel auspicious agent in the manufacturing of solid-state downconverted WLEDs. [ABSTRACT FROM AUTHOR]