Effect of synthesis route on the microstructure of SiO2 doped bismuth titanate ceramics

Synthesis and characterization of SiO2 doped bismuth titanate ceramics were investigated. Four investigated compositions belonging to the system Bi2O3-TiO2-SiO2 are located in the section Bi4Ti3O12-SiO2, near by it and in the binary Bi2O3-TiO2 system. Melt quenching was applied for synthesis of SiO2...

Full description

Bibliographic Details
Main Authors: Elena P. Kashchieva, Milena Z. Krapchanska, Stanislav S. Slavov, Yanko B. Dimitriev
Format: Article
Language:English
Published: University of Novi Sad 2009-12-01
Series:Processing and Application of Ceramics
Subjects:
Online Access:http://www.tf.uns.ac.rs/publikacije/PAC/pdf/PAC%2006%2002.pdf
id doaj-f54dff9edeee456d8d71006e35fa4687
record_format Article
spelling doaj-f54dff9edeee456d8d71006e35fa46872020-11-24T23:59:46ZengUniversity of Novi SadProcessing and Application of Ceramics1820-61312009-12-0134171175Effect of synthesis route on the microstructure of SiO2 doped bismuth titanate ceramicsElena P. KashchievaMilena Z. KrapchanskaStanislav S. SlavovYanko B. DimitrievSynthesis and characterization of SiO2 doped bismuth titanate ceramics were investigated. Four investigated compositions belonging to the system Bi2O3-TiO2-SiO2 are located in the section Bi4Ti3O12-SiO2, near by it and in the binary Bi2O3-TiO2 system. Melt quenching was applied for synthesis of SiO2 doped bismuth titanate ceramics and for the sample 40Bi2O3·60TiO2. The binary sample 70Bi2O3·30TiO2 is prepared by gradient heating of bulk materials near the liquidus temperature (modified solid state reaction). The influence of the thermal treatment on the phase formation and microstructure was evaluated using XRD, EDS and SEM. The binary samples prepared by solid state reaction at low temperature (1000°C) possess poly-phased dense microstructure, while secondary crystallization combined with porosity formation is typical for the sample obtained at high temperature (1150°C). The ternary Bi2O3-TiO2-SiO2 samples, obtained by supercooling of the melts down to room temperature, are thermally treated at 700, 800°C. They consist of elongated crystals in amorphous matrix. The crystals have lower Bi2O3-content and higher TiO2-content than the nominal batch composition. The XRD data show that the main crystalline phases in the ceramics produced by melt quenching method and solid state reaction are β-Bi2O3, Bi4Ti3O12 and one unknown new phase. It is proved that the applied methods of synthesis are suitable for generation of different microstructures in the bulk SiO2 doped bismuth titanate ceramics, which is promising basis for modification of their electrical properties. http://www.tf.uns.ac.rs/publikacije/PAC/pdf/PAC%2006%2002.pdfBismuth titanateMelt quenchingHeat treatmentMicrostructure
collection DOAJ
language English
format Article
sources DOAJ
author Elena P. Kashchieva
Milena Z. Krapchanska
Stanislav S. Slavov
Yanko B. Dimitriev
spellingShingle Elena P. Kashchieva
Milena Z. Krapchanska
Stanislav S. Slavov
Yanko B. Dimitriev
Effect of synthesis route on the microstructure of SiO2 doped bismuth titanate ceramics
Processing and Application of Ceramics
Bismuth titanate
Melt quenching
Heat treatment
Microstructure
author_facet Elena P. Kashchieva
Milena Z. Krapchanska
Stanislav S. Slavov
Yanko B. Dimitriev
author_sort Elena P. Kashchieva
title Effect of synthesis route on the microstructure of SiO2 doped bismuth titanate ceramics
title_short Effect of synthesis route on the microstructure of SiO2 doped bismuth titanate ceramics
title_full Effect of synthesis route on the microstructure of SiO2 doped bismuth titanate ceramics
title_fullStr Effect of synthesis route on the microstructure of SiO2 doped bismuth titanate ceramics
title_full_unstemmed Effect of synthesis route on the microstructure of SiO2 doped bismuth titanate ceramics
title_sort effect of synthesis route on the microstructure of sio2 doped bismuth titanate ceramics
publisher University of Novi Sad
series Processing and Application of Ceramics
issn 1820-6131
publishDate 2009-12-01
description Synthesis and characterization of SiO2 doped bismuth titanate ceramics were investigated. Four investigated compositions belonging to the system Bi2O3-TiO2-SiO2 are located in the section Bi4Ti3O12-SiO2, near by it and in the binary Bi2O3-TiO2 system. Melt quenching was applied for synthesis of SiO2 doped bismuth titanate ceramics and for the sample 40Bi2O3·60TiO2. The binary sample 70Bi2O3·30TiO2 is prepared by gradient heating of bulk materials near the liquidus temperature (modified solid state reaction). The influence of the thermal treatment on the phase formation and microstructure was evaluated using XRD, EDS and SEM. The binary samples prepared by solid state reaction at low temperature (1000°C) possess poly-phased dense microstructure, while secondary crystallization combined with porosity formation is typical for the sample obtained at high temperature (1150°C). The ternary Bi2O3-TiO2-SiO2 samples, obtained by supercooling of the melts down to room temperature, are thermally treated at 700, 800°C. They consist of elongated crystals in amorphous matrix. The crystals have lower Bi2O3-content and higher TiO2-content than the nominal batch composition. The XRD data show that the main crystalline phases in the ceramics produced by melt quenching method and solid state reaction are β-Bi2O3, Bi4Ti3O12 and one unknown new phase. It is proved that the applied methods of synthesis are suitable for generation of different microstructures in the bulk SiO2 doped bismuth titanate ceramics, which is promising basis for modification of their electrical properties.
topic Bismuth titanate
Melt quenching
Heat treatment
Microstructure
url http://www.tf.uns.ac.rs/publikacije/PAC/pdf/PAC%2006%2002.pdf
work_keys_str_mv AT elenapkashchieva effectofsynthesisrouteonthemicrostructureofsio2dopedbismuthtitanateceramics
AT milenazkrapchanska effectofsynthesisrouteonthemicrostructureofsio2dopedbismuthtitanateceramics
AT stanislavsslavov effectofsynthesisrouteonthemicrostructureofsio2dopedbismuthtitanateceramics
AT yankobdimitriev effectofsynthesisrouteonthemicrostructureofsio2dopedbismuthtitanateceramics
_version_ 1725446147334471680