Jimma University Open access Institutional Repository

Investigation of barium strontium sodium niobate Ferro electrics and calcium magnesium silicate phosphor Nano materials for applications

Show simple item record

dc.contributor.author Solomon Hailemariam
dc.contributor.author Nebiyu Gemechu
dc.contributor.author Menberu Mengesha
dc.date.accessioned 2025-07-21T08:03:09Z
dc.date.available 2025-07-21T08:03:09Z
dc.date.issued 2024-06-27
dc.identifier.uri https://repository.ju.edu.et//handle/123456789/9779
dc.description.abstract This is astudyreportofrareearthHolmiumionadditiveBariumStrontiumSodium Niobate (Ba(1.6−3/2X)Sr2.4Na2Nb10O30 : xHo3+) tungsten bronze structured ferro electrics nanomaterial by conventional solid state reaction routes using Barium Carbonate (BaCO3), Strontium carbonate (SrCO3), Sodium Carbonate (Na2CO3) 99.90% NICE, and Niobium Oxide (Nb2O5) and Holmium oxide (Ho2O3) 99.99% Sigma-Aldrichasstartingmaterialsundernormalstoichiometricratiosynthesisap proach. The X-ray diffraction (XRD), the scanning electron spectroscopy (SEM), energy dispersive x-ray spectroscopy (EDS) and Fourier transform- infrared spec troscopy (FTIR) were used to study the structure, surface morphology/ microstruc ture, elemental composition/mapping and finger print functional groups identifi cation respectively. The XRD pattern revealed Tetragonal Tungsten Bronze struc tured crystallite phase that best match with the JCPDS card number-00-039-1453 having space group of p4bm and lattice parameters of a = 12.33 ˚A, b = 12.33 ˚A and c = 3.93 ˚A. The average crystallite size of the synthesized sample obtained at the prominent peak (311) for position/2θ=32.320 is 67.52 nm. The SEM images showedthat surface microstructures have random and nearly uniform distribution of nanoparticles with different shapes and size on the surface. It is also nearly non porous surface microstructure that is promising for enhancing optical properties havingmoreparticlesonthesurface. EDSanalysisconfirmedthepresenceofallthe constituent elements with their proportional ratios of Wt.% and At %. EDS experi mental results best fit with theoretically calculated values. For the pure metal oxide the FTIR results showed the bond vibration mode at wavenumber of 540.60 cm−1, having only single collective metal oxide intense peak without impurities. When Ho3+ or (ions) with concentration of 0.05 and 0.10 % added additional peaks was observed at 429.92 cm−1 and 415.77 cm−1 respectively; confirming the existence of Ho-Obondvibration modes. en_US
dc.language.iso en en_US
dc.title Investigation of barium strontium sodium niobate Ferro electrics and calcium magnesium silicate phosphor Nano materials for applications en_US
dc.type Dissertation en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search IR


Browse

My Account