Rietveld refinement on XRD and TEM study of nanocrystalline PbZr0:5Ti 0:5O3 ceramics prepared with a soft chemistry route

• Autorzy: Mandal T. K.

Identyfikatory

DOI

10.1515/msp-2015-0040

• Języki publikacji: EN

Abstrakty

EN

PbZr_0.5Ti_0.5 O₃ nanopowders (~27 nm) have been prepared by a controlled reconstructive thermal decomposition and crystallization from an amorphous polymeric precursor with polyvinyl alcohol (PVA) and sucrose at 400 to 700 °C in air. The Rietveld refinement of the XRD profiles which were recorded at room temperature for the PbZr_0.5Ti_0.5 O₃ powder prepared by a thermal treatment at 700 °C for 2 h, confirmed the P4mm tetragonal crystal structure of the as prepared PbZr_0.5Ti_0.5 O₃ nanopowders, with a = 0.4036 nm and c = 0.4147 nm. A hexagonal symmetry (R3c), with a = 0.5774 nm and c = 1.4212 nm, was also detected from Rietveld refinement analysis. Thus, tetragonal and hexagonal phases were found to coexist with the as prepared PbZr_0.5Ti_0.5 O₃ nanopowders. The average particle size (D) of the PbZr_0.5Ti_0.5 O₃ powders, estimated with the help of the specific surface area, measured by BET method, was 26.1 nm. Average D value, calculated by Δ2Θ_1/2 in the XRD peaks with the Debye-Scherrer relation was ~24 nm. TEM study made it possible to measure the particle size of PbZr_0.5Ti_0.5 O₃ powders with an average diameter of 27 nm.

Słowa kluczowe

EN

precursor method; PbZr0; 5Ti0; 5O3 nanopowders; tetragonal phase; PVA-sucrose; ferroelectrics

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2015
• Tom: Vol. 33, No. 1
• Strony: 18--24
• Opis fizyczny: Bibliogr. 35 poz., rys., tab.

Twórcy

autor

Mandal T. K.

• Faculty of Science and Technology, The ICFAI University, Rajawala Road, Central Hope Town, Selaqui, Dehradun-248197, Uttarakhand, India

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