Formation of SrVO3 precursors from Sr(OH)2 and VmOn (2/5 ≦m/ n≦ 2/3) by mechanical stressing under ambient or reducing atmosphere

Wha Sup Lee, Tetsuhiko Isobe, Mamoru Senna

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Mechanochemical and subsequent heating processes to produce SrVO3 are studied, starting from a mixture of Sr(OH)2 and VmOn (2/5 ≦ m/n ≦2/3) by milling and heating in an ambient or reducing atmosphere. Single phase perovskite SrVO3 was obtained by firing the milled mixtures at 1300°C under reducing atmosphere with four dehydration steps via two intermediates, Sr2V2O7 and Sr8V8O25. The fourth dehydration step, corresponding to transformation of Sr8V8O25 to SrVO3, appears at around 1100°C by heating mixtures containing trivalent vanadium and milled in a reducing atmosphere. Dehydration of the mixtures was promoted by milling under N2-4% H2, due to reduction of precursors by hydrogen. The precursor from the mixture with III-V mixed-valent vanadium milled under N2-4% H2 is closer to the final product SrVO3 than any other precursors.

Original languageEnglish
Pages (from-to)293-300
Number of pages8
JournalSolid State Ionics
Volume123
Issue number1-4
Publication statusPublished - 1999

Fingerprint

atmospheres
Dehydration
dehydration
Vanadium
vanadium
heating
Heating
Industrial heating
Perovskite
Hydrogen
hydrogen
products

Keywords

  • Mechanochemical process
  • Mixed-valency of vanadium
  • Perovskite
  • Precursor of SrVO

ASJC Scopus subject areas

  • Electrochemistry
  • Physical and Theoretical Chemistry
  • Energy Engineering and Power Technology
  • Materials Chemistry
  • Condensed Matter Physics

Cite this

Formation of SrVO3 precursors from Sr(OH)2 and VmOn (2/5 ≦m/ n≦ 2/3) by mechanical stressing under ambient or reducing atmosphere. / Lee, Wha Sup; Isobe, Tetsuhiko; Senna, Mamoru.

In: Solid State Ionics, Vol. 123, No. 1-4, 1999, p. 293-300.

Research output: Contribution to journalArticle

@article{17531d027458453d83d3f36166f631bb,
title = "Formation of SrVO3 precursors from Sr(OH)2 and VmOn (2/5 ≦m/ n≦ 2/3) by mechanical stressing under ambient or reducing atmosphere",
abstract = "Mechanochemical and subsequent heating processes to produce SrVO3 are studied, starting from a mixture of Sr(OH)2 and VmOn (2/5 ≦ m/n ≦2/3) by milling and heating in an ambient or reducing atmosphere. Single phase perovskite SrVO3 was obtained by firing the milled mixtures at 1300°C under reducing atmosphere with four dehydration steps via two intermediates, Sr2V2O7 and Sr8V8O25. The fourth dehydration step, corresponding to transformation of Sr8V8O25 to SrVO3, appears at around 1100°C by heating mixtures containing trivalent vanadium and milled in a reducing atmosphere. Dehydration of the mixtures was promoted by milling under N2-4{\%} H2, due to reduction of precursors by hydrogen. The precursor from the mixture with III-V mixed-valent vanadium milled under N2-4{\%} H2 is closer to the final product SrVO3 than any other precursors.",
keywords = "Mechanochemical process, Mixed-valency of vanadium, Perovskite, Precursor of SrVO",
author = "Lee, {Wha Sup} and Tetsuhiko Isobe and Mamoru Senna",
year = "1999",
language = "English",
volume = "123",
pages = "293--300",
journal = "Solid State Ionics",
issn = "0167-2738",
publisher = "Elsevier",
number = "1-4",

}

TY - JOUR

T1 - Formation of SrVO3 precursors from Sr(OH)2 and VmOn (2/5 ≦m/ n≦ 2/3) by mechanical stressing under ambient or reducing atmosphere

AU - Lee, Wha Sup

AU - Isobe, Tetsuhiko

AU - Senna, Mamoru

PY - 1999

Y1 - 1999

N2 - Mechanochemical and subsequent heating processes to produce SrVO3 are studied, starting from a mixture of Sr(OH)2 and VmOn (2/5 ≦ m/n ≦2/3) by milling and heating in an ambient or reducing atmosphere. Single phase perovskite SrVO3 was obtained by firing the milled mixtures at 1300°C under reducing atmosphere with four dehydration steps via two intermediates, Sr2V2O7 and Sr8V8O25. The fourth dehydration step, corresponding to transformation of Sr8V8O25 to SrVO3, appears at around 1100°C by heating mixtures containing trivalent vanadium and milled in a reducing atmosphere. Dehydration of the mixtures was promoted by milling under N2-4% H2, due to reduction of precursors by hydrogen. The precursor from the mixture with III-V mixed-valent vanadium milled under N2-4% H2 is closer to the final product SrVO3 than any other precursors.

AB - Mechanochemical and subsequent heating processes to produce SrVO3 are studied, starting from a mixture of Sr(OH)2 and VmOn (2/5 ≦ m/n ≦2/3) by milling and heating in an ambient or reducing atmosphere. Single phase perovskite SrVO3 was obtained by firing the milled mixtures at 1300°C under reducing atmosphere with four dehydration steps via two intermediates, Sr2V2O7 and Sr8V8O25. The fourth dehydration step, corresponding to transformation of Sr8V8O25 to SrVO3, appears at around 1100°C by heating mixtures containing trivalent vanadium and milled in a reducing atmosphere. Dehydration of the mixtures was promoted by milling under N2-4% H2, due to reduction of precursors by hydrogen. The precursor from the mixture with III-V mixed-valent vanadium milled under N2-4% H2 is closer to the final product SrVO3 than any other precursors.

KW - Mechanochemical process

KW - Mixed-valency of vanadium

KW - Perovskite

KW - Precursor of SrVO

UR - http://www.scopus.com/inward/record.url?scp=0032650302&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032650302&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0032650302

VL - 123

SP - 293

EP - 300

JO - Solid State Ionics

JF - Solid State Ionics

SN - 0167-2738

IS - 1-4

ER -