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Inicio Ciência & Tecnologia dos Materiais Study of nanomechanical properties of (1-y)BST-yMgO thin films
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Vol. 29. Issue 1.
Materiais 2015
Pages e71-e75 (January - April 2017)
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Vol. 29. Issue 1.
Materiais 2015
Pages e71-e75 (January - April 2017)
DOI: 10.1016/j.ctmat.2016.07.017
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Study of nanomechanical properties of (1-y)BST-yMgO thin films
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Dionizy Czekajaa,
Corresponding author
dionizy.czekaj@us.edu.pl

Corresponding author.
, Agata Lisińska-Czekajaa, Julian Plewabb
a University of Silesia in Katowice, Institute of Technology and Mechatronics, 12 Żytnia St., Sosnowiec 41-200, Poland
b University of Applied Sciences Münster, Department of Chemical Engineering, Stegerwaldstrasse 39, D-48565, Steinfurt, Germany
Article information
Abstract

In the present study thin films of MgO – modified Ba0.6Sr0.4TiO3 (BST60/40) solid solution were prepared by the sol-gel-type chemical solution deposition method on stainless steel substrates. A multilayer spin-coating approach was utilized for the Ba0.6Sr0.4TiO3-MgO thin film deposition with subsequent thermal annealing at T=650-750°C. Dried BST60/40-MgO gel powders were studied with thermogravimetric and differential thermal analysis to determine their thermochemical properties. X-ray diffraction analysis was utilized for thin film characterization in terms of its phase composition and crystal structure. The influence of y=1, 3 and 5 mol.% MgO doping on nanomechanical properties of BST60/40 thin films was studied with nanoindentation. It was found that BST6040 thin films adopted the tetragonal P4mm (99) structure. The volume of the BST60/40 elementary cell, the average hardness as well as the mean value of the Young modulus decreased with an increase in amount of MgO.

Keywords:
BST thin films
sol-gel method
crystal structure
AFM
nanoindentation
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Copyright © 2017. Portuguese Society of Materials (SPM)
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