<abstract xmlns="http://www.w3.org/1999/xhtml">In this research work, nanocrystalline BST (Ba0.6Sr0.4TiO3) powders were synthesized through a modified sol-gel process, using barium acetate, strontium acetate and titanium isopropoxide as the precursors. In this process, stoichiometric proportions of barium acetate and strontium acetate were dissolved in acetic acid and titanium (IV) isopropoxide was added to form BST gel. The as-formed gel was dried at 200 °C and then calcined in the temperature range of 600 to 850 °C for crystallization. The samples were characterized by infrared spectroscopy method (FT-IR), X-ray diffraction technique (XRD) and field emission scanning electron microscope (FESEM) and energy dispersive X-ray spectroscopy. EDS analysis of these samples confirmed the formation of the final phase with the special stoichiometry. The formation of a cubic perovskite crystalline phase with nanoscale dimension was detected using the mentioned techniques. The results showed that the obtained crystallite sizes were 33 and 37 nm for BST powder calcined at 750 and 850 °C, respectively.</abstract>

In this research work, nanocrystalline BST (Ba0.6Sr0.4TiO3) powders were synthesized through a modified sol-gel process, using barium acetate, strontium acetate and titanium isopropoxide as the precursors. In this process, stoichiometric proportions of barium acetate and strontium acetate were dissolved in acetic acid and titanium (IV) isopropoxide was added to form BST gel. The as-formed gel was dried at 200 °C and then calcined in the temperature range of 600 to 850 °C for crystallization. The samples were characterized by infrared spectroscopy method (FT-IR), X-ray diffraction technique (XRD) and field emission scanning electron microscope (FESEM) and energy dispersive X-ray spectroscopy. EDS analysis of these samples confirmed the formation of the final phase with the special stoichiometry. The formation of a cubic perovskite crystalline phase with nanoscale dimension was detected using the mentioned techniques. The results showed that the obtained crystallite sizes were 33 and 37 nm for BST powder calcined at 750 and 850 °C, respectively.

Synthesis and characterization of nanocrystalline barium strontium titanate powder by a modified sol-gel processing

Department of Physics, Kharazmi University, Tehran,

Department of Physics, Islamic Azad University North Tehran Branch, Tehran,

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

In this research work, nanocrystalline BST (Ba0.6Sr0.4TiO3) powders were synthesized through a modified sol-gel process, using barium acetate, strontium...

Crystal system	Cubic	Angles (α, β, γ)	90.00°, 90.00°, 90.00°
Space group number	221	Calculated density	5.68
Space group	Pm-3m	Volume of cell	62.33
Lattice parameter s	3.965 Å, 3.965 Å, 3.965 Å

h k l	2θ [deg]	d_hkl [Å]	FWHM [deg]	Crystal size [nm]	Lattice parameter [Å]
1 0 0	22.265	3.9893	0.1993	40.61
1 1 0	31.827	2.8092	0.2423	34.08
1 1 1	39.368	2.2867	0.2709	31.13
2 0 0	45.724	1.9826	0.3145	27.40
			Average	33.31
3 1 0	75.897	1.2525			3.959
3 1 1	80.035	1.1979			3.971
2 2 2	84.608	1.1444			3.963
				Average	3.965

h k l	2 [deg]	d_hkl [ Å]	FWHM [deg]	Crystal size [nm]	Lattice parameter [ Å]
1 0 0	22.279	3.9869	0.1665	48.61
1 1 0	31.826	2.8093	0.2193	37.65
1 1 1	39.312	2.2899	0.253	33.33
2 0 0	45.632	1.9864	0.2748	31.35
			Average	37.74
3 1 0	75.609	1.2566			3.972
3 1 1	80.281	1.1948			3.961
2 2 2	84.378	1.1469			3.972
				Average	3.969

Synthesis and characterization of nanocrystalline barium strontium titanate powder by a modified sol-gel processing

Article Category: Research Article

Publié en ligne: 27 avr. 2016

Pages: 63 - 68

Reçu: 12 avr. 2015

Accepté: 07 déc. 2015

DOI: https://doi.org/10.1515/msp-2016-0020

Mots clés

© 2016 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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The Crystallographic parameters used for the XRD pattern fitting for BST60/40 ceramics (PDF Card No. 00-034-0411).

Details of the calculated X-ray spectrum for BST powder calcined at 750 °C.

Details of the calculated X-ray spectrum for BST powder calcined at 850 °C.