skip to main content

SciTech ConnectSciTech Connect

Title: A study of structural, optical and dielectric properties of crystalline Sr{sub 2}Nb{sub 2}O{sub 7} nanoparticles synthesized by a modified combustion technique

Nanocrystalline Strontium Pyroniobate is synthesized by a novel auto-igniting combustion technique. The X-Ray diffraction studies reveal that Strontium Niobate possesses orthorhombic structure. Phase purity and structure of the nanopowder is further examined using Fourier-Transform Infrared and Raman spectroscopy. The average particle size of the as prepared nanoparticles from the Transmission Electron Microscopy is 30 nm. Sr{sub 2}Nb{sub 2}O{sub 7} is a photoluminescent material and the optical band gap determined from the UV-DRS spectrum is 2.7eV. The sample is sintered at an optimized temperature of 1350°C for 2 hours and obtained maximum density. The dielectric constant and loss factor values obtained at 5MHz for a well-sintered Strontium Niobate pellet is found to be 40 and 3.9×10{sup −3} respectively, at room temperature.
Authors:
 [1] ; ;  [2] ;  [3]
  1. Department of Physics, St. Aloysius' College, Edathua, Alappuzha, Kerala (India)
  2. Electronic Materials Research Laboratory, Department of Physics, Mar Ivanios College, Thiruvananthapuram- 695015, Kerala (India)
  3. Department of Physics, St. John's College, Anchal-691306, Kerala (India)
Publication Date:
OSTI Identifier:
22264093
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1576; Journal Issue: 1; Conference: OMTAT 2013: 2. international conference on optoelectronic materials and thin films for advanced technology, Kochi, Kerala (India), 3-5 Jan 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; COMBUSTION; CRYSTALS; DENSITY; FOURIER TRANSFORMATION; NANOSTRUCTURES; NIOBATES; ORTHORHOMBIC LATTICES; PARTICLE SIZE; PARTICLES; PERMITTIVITY; PHOTOLUMINESCENCE; RAMAN SPECTROSCOPY; SPECTRA; STRONTIUM; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION