skip to main content

SciTech ConnectSciTech Connect

Title: Effect of calcination temperature on phase transformation of HfO{sub 2} nanoparticles

Oxides nanomaterials exhibit unique physical, chemical and structural properties and motivated a big research that focus in the integration of these materials for various optoelectronic device applications. In present work, hafnium oxide (HfO{sub 2}) nanoparticles (NPs) have been synthesized using precipitation method. Hafnium tetrachloride and sodium hydroxide has been used as starting precursors. Prepared oxide material has been characterized by X-Ray Diffraction (XRD), Fourier Transform Infra-Red (FTIR) and UV-Vis spectroscopy. The phase transformation from amorphous to monoclinic is observed with the increase in calcination temperature from 500 °C and 800 °C. In FTIR spectra, the characteristic bands at ν ∼ 758.53 and 509.57 cm{sup −1} reveals the monoclinic phase of prepared HfO{sub 2} NPs. UV-Vis spectroscopy shows an absorption peak at 204 nm and the bandgap calculated is 6.07 eV.
Authors:
 [1] ;  [2] ;  [3] ; ;  [1]
  1. Department of Physics, Center of Advanced Study in Physics, Panjab University, Chandigarh-160 014 (India)
  2. (India)
  3. Center of Nanoscience and Nanotechnology, Panjab University, Chandigarh-160 014 (India)
Publication Date:
OSTI Identifier:
22488824
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1675; Journal Issue: 1; Conference: AMRP-2015: 4. national conference on advanced materials and radiation physics, Longowal (India), 13-14 Mar 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION SPECTROSCOPY; CALCINATION; FOURIER TRANSFORMATION; HAFNIUM; HAFNIUM OXIDES; INFRARED SPECTRA; MONOCLINIC LATTICES; NANOMATERIALS; NANOPARTICLES; OPTOELECTRONIC DEVICES; PHASE TRANSFORMATIONS; PRECIPITATION; SODIUM HYDROXIDES; ULTRAVIOLET SPECTRA; VISIBLE SPECTRA; X-RAY DIFFRACTION