title: Low temperature synthesis of pure cubic ZrO2 nanopowder: structural and luminescence studies.
abstract: Pure cubic zirconia (ZrO2) nanopowder is prepared for the first time by simple low temperature solution combustion method without calcination. The product is characterized by Powder X-ray Diffraction (PXRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Fourier Transform Infra Red spectroscopy (FTIR) and Ultraviolet-Visible spectroscopy (UV-Vis). The PXRD showed the formation of pure stable cubic ZrO2 nanopowders with average crystallite size ranging from 6 to 12 nm. The lattice parameters were calculated from Rietveld refinement method. SEM micrograph shows fluffy, mesoporous, agglomerated particles with large number of voids. TEM micrograph shows honey comb like arrangement of particles with particle size ∼10 nm. The PL emission spectrum excited at 210 nm and 240 nm consists of intense bands centered at ∼365 and ∼390 nm. Both the samples show shoulder peak at ∼420 nm, along with four weak emission bands at ∼484, ∼528, ∼614 and ∼726 nm. TL studies were carried out pre-irradiating samples with γ-rays ranging from 1 to 5 KGy at room temperature. A well resolved glow peak at 377 °C is recorded which can be ascribed to deep traps. With increase in γ radiation there is linear increase in TL intensity which shows the possible use of ZrO2 as dosimetric material.
authors: Bharathiar University, Coimbatore 641 046, India; Department of Physics, Government Arts College, Udumalpet 642 126, India. Electronic address: prakashdebabu@gmail.com.
authors: D
authors: D
authors: Prakashbabu
authors: Department of Chemistry, M.S. Ramaiah Institute of Technology, Bangalore 560 054, India. Electronic address: rhk.chem@gmail.com.
authors: R
authors: R
authors: Hari Krishna
authors: Department of Chemistry, M.S. Ramaiah Institute of Technology, Bangalore 560 054, India.
authors: B M
authors: BM
authors: Nagabhushana
authors: C.N.R. Rao Center for Nano Research, Tumkur University, Tumkur 572 103, India.
authors: H
authors: H
authors: Nagabhushana
authors: Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012, India.
authors: C
authors: C
authors: Shivakumara
authors: National Aerospace Laboratory (CSIR), Bangalore 560 017, India.
authors: R P S
authors: RP
authors: Chakradar
authors: Department of Physics, Government Arts College, Udumalpet 642 126, India.
authors: H B
authors: HB
authors: Ramalingam
authors: Department of Mechanical Engineering, B.M.S. Institute of Technology, Bangalore 560 064, India.
authors: S C
authors: SC
authors: Sharma
authors: Department of Physics, Sevugan Annamalai College, Devakottai 630 303, India.
authors: R
authors: R
authors: Chandramohan
mesh_terms: D007700:Kinetics; D008163:Luminescent Measurements; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D011208:Powders; D012996:Solutions; D013052:Spectrometry, X-Ray Emission; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D014961:X-Ray Diffraction; D015040:Zirconium / Q000737:chemistry*
chemical_list: D011208:Powders; D012996:Solutions; D015040:Zirconium; C028541:zirconium oxide
keywords: Combustion synthesis; Cubic zirconia; Kinetic parameters; Photoluminescence; Thermoluminescence