Hydrothermal synthesis of lead-free perovskite (Bi1/2K1/2)(Zrx Ti1-x)O3 powders

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Abstract

We developed a hydrothermal synthesis method for lead-free perovskite (Bi1/2K1/2)(ZrxTi1-x)O3 (BKZT) powders. Singlephase BKZT powders with various nominal Zr contents as high as x = 0.10 were obtained using amorphous hydrous oxide (ZrxTi1-x)O2nH2O precursors prepared by the hydrolysis of Zr- and Ti-alkoxides, whereas a reaction using a mixture of crystalline TiO2 and ZrO2 powders did not provide single-phase BKZT. Elemental analysis revealed that the Zr contents of the obtained BKZT powders were slightly higher than the nominal values. The powders had fine particle sizes smaller than 300nm and were stable against a higherature heat treatment at 1000C. These observations suggest that the hydrothermally derived powders are suitable for use in fabricating bulk BKZT ceramics via sintering.

Original languageEnglish
Pages (from-to)454-457
Number of pages4
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume125
Issue number6
DOIs
Publication statusPublished - 2017 Jun 1

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Hydrothermal synthesis
Powders
Perovskite
Lead
synthesis
alkoxides
Oxides
hydrolysis
perovskite
Hydrolysis
sintering
heat treatment
Sintering
Particle size
Heat treatment
ceramics
Crystalline materials
oxides
Chemical analysis
approximation

Keywords

  • (BiK)TiO
  • Element substitution
  • Hydrothermal method
  • Lead-free piezoelectric ceramics

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

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title = "Hydrothermal synthesis of lead-free perovskite (Bi1/2K1/2)(Zrx Ti1-x)O3 powders",
abstract = "We developed a hydrothermal synthesis method for lead-free perovskite (Bi1/2K1/2)(ZrxTi1-x)O3 (BKZT) powders. Singlephase BKZT powders with various nominal Zr contents as high as x = 0.10 were obtained using amorphous hydrous oxide (ZrxTi1-x)O2nH2O precursors prepared by the hydrolysis of Zr- and Ti-alkoxides, whereas a reaction using a mixture of crystalline TiO2 and ZrO2 powders did not provide single-phase BKZT. Elemental analysis revealed that the Zr contents of the obtained BKZT powders were slightly higher than the nominal values. The powders had fine particle sizes smaller than 300nm and were stable against a higherature heat treatment at 1000C. These observations suggest that the hydrothermally derived powders are suitable for use in fabricating bulk BKZT ceramics via sintering.",
keywords = "(BiK)TiO, Element substitution, Hydrothermal method, Lead-free piezoelectric ceramics",
author = "Makoto Ito and Manabu Hagiwara and Shinobu Fujihara",
year = "2017",
month = "6",
day = "1",
doi = "10.2109/jcersj2.16263",
language = "English",
volume = "125",
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journal = "Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan",
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publisher = "Ceramic Society of Japan/Nippon Seramikkusu Kyokai",
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TY - JOUR

T1 - Hydrothermal synthesis of lead-free perovskite (Bi1/2K1/2)(Zrx Ti1-x)O3 powders

AU - Ito, Makoto

AU - Hagiwara, Manabu

AU - Fujihara, Shinobu

PY - 2017/6/1

Y1 - 2017/6/1

N2 - We developed a hydrothermal synthesis method for lead-free perovskite (Bi1/2K1/2)(ZrxTi1-x)O3 (BKZT) powders. Singlephase BKZT powders with various nominal Zr contents as high as x = 0.10 were obtained using amorphous hydrous oxide (ZrxTi1-x)O2nH2O precursors prepared by the hydrolysis of Zr- and Ti-alkoxides, whereas a reaction using a mixture of crystalline TiO2 and ZrO2 powders did not provide single-phase BKZT. Elemental analysis revealed that the Zr contents of the obtained BKZT powders were slightly higher than the nominal values. The powders had fine particle sizes smaller than 300nm and were stable against a higherature heat treatment at 1000C. These observations suggest that the hydrothermally derived powders are suitable for use in fabricating bulk BKZT ceramics via sintering.

AB - We developed a hydrothermal synthesis method for lead-free perovskite (Bi1/2K1/2)(ZrxTi1-x)O3 (BKZT) powders. Singlephase BKZT powders with various nominal Zr contents as high as x = 0.10 were obtained using amorphous hydrous oxide (ZrxTi1-x)O2nH2O precursors prepared by the hydrolysis of Zr- and Ti-alkoxides, whereas a reaction using a mixture of crystalline TiO2 and ZrO2 powders did not provide single-phase BKZT. Elemental analysis revealed that the Zr contents of the obtained BKZT powders were slightly higher than the nominal values. The powders had fine particle sizes smaller than 300nm and were stable against a higherature heat treatment at 1000C. These observations suggest that the hydrothermally derived powders are suitable for use in fabricating bulk BKZT ceramics via sintering.

KW - (BiK)TiO

KW - Element substitution

KW - Hydrothermal method

KW - Lead-free piezoelectric ceramics

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