ZnO-activated formation of phase pure perovskite Pb(In 1/2 Nb 1/2 )O 3 -Pb(Zn 1/3 Nb 2/3 )O 3 -PbTiO 3 powder

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Abstract

This paper reports on the phase formation of perovskite Pb(In 1/2 Nb 1/2 )O 3 -Pb(Zn 1/3 Nb 2/3 )O 3 -PbTiO 3 (PIN-PZN-PT) powder when doped with 0.04 to 0.83 mol% ZnO. Air calcination of undoped powder mixtures for 4 hours at 800°C resulted in a mixture of Pb 2 Zn 0.29 Nb 1.71 O 6.565 pyrochlore, PIN-PZN-PT perovskite, and In 2 O 3 . ZnO dopant concentrations as low as 0.04 mol% increased the rate of perovskite formation and resulted in near phase pure perovskite powder of 0.5 µm particle size when heated at 800°C in air. In all cases PbTiO 3 and Pb(In 1/2 Nb 1/2 )O 3 formed prior to PIN-PZN-PT formation. ZnO doping promotes perovskite phase formation by increasing the reactivity of the intermediate pyrochlore phase by substituting Zn 2+ on Nb 5+ sites and forming oxygen vacancies when heated in air. Heating in high P O2 resulted in an incomplete reaction and a mixture of perovskite and pyrochlore whereas low P O2 resulted in phase separation into a mixture of rhombohedral perovskite, tetragonal perovskite, and pyrochlore. The P O2 sensitivity clearly shows that oxygen vacancies due to ZnO-doping are critical for synthesis of phase pure PIN-PZN-PT powder.

Original languageEnglish (US)
Pages (from-to)3932-3939
Number of pages8
JournalJournal of the American Ceramic Society
Volume102
Issue number7
DOIs
StatePublished - Jul 1 2019

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Powders
Perovskite
Doping (additives)
Oxygen vacancies
Air
perovskite
Phase separation
Calcination
Particle size
Heating
pyrochlore

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

@article{cfa7d29b8f4a4089969bfdf51c925ebf,
title = "ZnO-activated formation of phase pure perovskite Pb(In 1/2 Nb 1/2 )O 3 -Pb(Zn 1/3 Nb 2/3 )O 3 -PbTiO 3 powder",
abstract = "This paper reports on the phase formation of perovskite Pb(In 1/2 Nb 1/2 )O 3 -Pb(Zn 1/3 Nb 2/3 )O 3 -PbTiO 3 (PIN-PZN-PT) powder when doped with 0.04 to 0.83 mol{\%} ZnO. Air calcination of undoped powder mixtures for 4 hours at 800°C resulted in a mixture of Pb 2 Zn 0.29 Nb 1.71 O 6.565 pyrochlore, PIN-PZN-PT perovskite, and In 2 O 3 . ZnO dopant concentrations as low as 0.04 mol{\%} increased the rate of perovskite formation and resulted in near phase pure perovskite powder of 0.5 µm particle size when heated at 800°C in air. In all cases PbTiO 3 and Pb(In 1/2 Nb 1/2 )O 3 formed prior to PIN-PZN-PT formation. ZnO doping promotes perovskite phase formation by increasing the reactivity of the intermediate pyrochlore phase by substituting Zn 2+ on Nb 5+ sites and forming oxygen vacancies when heated in air. Heating in high P O2 resulted in an incomplete reaction and a mixture of perovskite and pyrochlore whereas low P O2 resulted in phase separation into a mixture of rhombohedral perovskite, tetragonal perovskite, and pyrochlore. The P O2 sensitivity clearly shows that oxygen vacancies due to ZnO-doping are critical for synthesis of phase pure PIN-PZN-PT powder.",
author = "Brova, {Michael J.} and Watson, {Beecher H.} and Kupp, {Elizabeth Rader} and Fanton, {Mark Andrew} and {Meyer, Jr.}, {Richard Joseph} and Messing, {Gary Lynn}",
year = "2019",
month = "7",
day = "1",
doi = "10.1111/jace.16296",
language = "English (US)",
volume = "102",
pages = "3932--3939",
journal = "Journal of the American Ceramic Society",
issn = "0002-7820",
publisher = "Wiley-Blackwell",
number = "7",

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T1 - ZnO-activated formation of phase pure perovskite Pb(In 1/2 Nb 1/2 )O 3 -Pb(Zn 1/3 Nb 2/3 )O 3 -PbTiO 3 powder

AU - Brova, Michael J.

AU - Watson, Beecher H.

AU - Kupp, Elizabeth Rader

AU - Fanton, Mark Andrew

AU - Meyer, Jr., Richard Joseph

AU - Messing, Gary Lynn

PY - 2019/7/1

Y1 - 2019/7/1

N2 - This paper reports on the phase formation of perovskite Pb(In 1/2 Nb 1/2 )O 3 -Pb(Zn 1/3 Nb 2/3 )O 3 -PbTiO 3 (PIN-PZN-PT) powder when doped with 0.04 to 0.83 mol% ZnO. Air calcination of undoped powder mixtures for 4 hours at 800°C resulted in a mixture of Pb 2 Zn 0.29 Nb 1.71 O 6.565 pyrochlore, PIN-PZN-PT perovskite, and In 2 O 3 . ZnO dopant concentrations as low as 0.04 mol% increased the rate of perovskite formation and resulted in near phase pure perovskite powder of 0.5 µm particle size when heated at 800°C in air. In all cases PbTiO 3 and Pb(In 1/2 Nb 1/2 )O 3 formed prior to PIN-PZN-PT formation. ZnO doping promotes perovskite phase formation by increasing the reactivity of the intermediate pyrochlore phase by substituting Zn 2+ on Nb 5+ sites and forming oxygen vacancies when heated in air. Heating in high P O2 resulted in an incomplete reaction and a mixture of perovskite and pyrochlore whereas low P O2 resulted in phase separation into a mixture of rhombohedral perovskite, tetragonal perovskite, and pyrochlore. The P O2 sensitivity clearly shows that oxygen vacancies due to ZnO-doping are critical for synthesis of phase pure PIN-PZN-PT powder.

AB - This paper reports on the phase formation of perovskite Pb(In 1/2 Nb 1/2 )O 3 -Pb(Zn 1/3 Nb 2/3 )O 3 -PbTiO 3 (PIN-PZN-PT) powder when doped with 0.04 to 0.83 mol% ZnO. Air calcination of undoped powder mixtures for 4 hours at 800°C resulted in a mixture of Pb 2 Zn 0.29 Nb 1.71 O 6.565 pyrochlore, PIN-PZN-PT perovskite, and In 2 O 3 . ZnO dopant concentrations as low as 0.04 mol% increased the rate of perovskite formation and resulted in near phase pure perovskite powder of 0.5 µm particle size when heated at 800°C in air. In all cases PbTiO 3 and Pb(In 1/2 Nb 1/2 )O 3 formed prior to PIN-PZN-PT formation. ZnO doping promotes perovskite phase formation by increasing the reactivity of the intermediate pyrochlore phase by substituting Zn 2+ on Nb 5+ sites and forming oxygen vacancies when heated in air. Heating in high P O2 resulted in an incomplete reaction and a mixture of perovskite and pyrochlore whereas low P O2 resulted in phase separation into a mixture of rhombohedral perovskite, tetragonal perovskite, and pyrochlore. The P O2 sensitivity clearly shows that oxygen vacancies due to ZnO-doping are critical for synthesis of phase pure PIN-PZN-PT powder.

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U2 - 10.1111/jace.16296

DO - 10.1111/jace.16296

M3 - Article

VL - 102

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JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

SN - 0002-7820

IS - 7

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