Synthesis and characteristics of near-stoichiometric barium titanate powder by low temperature hydrothermal reaction using titanium tetra(methoxyethoxide)

Kyoungja Woo, Guang J. Choi, Sang Jun Sim, Young S. Cho, Young D. Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Near-stoichiometric BaTiO3 powders with ultrafine particle size and high crystallinity were prepared by low temperature hydrothermal reaction of Ba(OAc)2 and Ti(OCH2CH2OCH3)4. BaTiO3 particles were synthesized in the spherical, metastable cubic crystalline grains with size distribution between 60-90 nm in diameter. Ultrafine particle size was resulted from the control of the hydration rate and the decrease of Ti-O-Ti cross-linking extent of titanium precursor, Ti(OCH2CH2OCH3)4, which gives electronic, steric, and weakly chelating effect to titanium ion. Increasing the Ba/Ti mole ratio in reactant could not overcome the notorious Ba-deficiency but, improved stoichiometry and produced finer and less agglomerated particles. Interestingly, adding a slight pressure to autogeneous hydrothermal condition (total 4-10 atm) has yielded near-stoichiometric, highly crystalline, and less agglomerated BaTiO3 particles. These particles, which were in metastable cubic form as synthesized, initiated phasetransition to tetragonal form by calcination at below 400 °C.

Original languageEnglish
Pages (from-to)4539-4548
Number of pages10
JournalJournal of Materials Science
Volume35
Issue number18
DOIs
Publication statusPublished - 2000 Sep 1

Fingerprint

Barium titanate
Titanium
Powders
Particle size
Crystalline materials
Chelation
Stoichiometry
Hydration
Calcination
Ions
Temperature
Ultrafine

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Synthesis and characteristics of near-stoichiometric barium titanate powder by low temperature hydrothermal reaction using titanium tetra(methoxyethoxide). / Woo, Kyoungja; Choi, Guang J.; Sim, Sang Jun; Cho, Young S.; Kim, Young D.

In: Journal of Materials Science, Vol. 35, No. 18, 01.09.2000, p. 4539-4548.

Research output: Contribution to journalArticle

@article{bd9fec550ff44d099b8b79ef83805488,
title = "Synthesis and characteristics of near-stoichiometric barium titanate powder by low temperature hydrothermal reaction using titanium tetra(methoxyethoxide)",
abstract = "Near-stoichiometric BaTiO3 powders with ultrafine particle size and high crystallinity were prepared by low temperature hydrothermal reaction of Ba(OAc)2 and Ti(OCH2CH2OCH3)4. BaTiO3 particles were synthesized in the spherical, metastable cubic crystalline grains with size distribution between 60-90 nm in diameter. Ultrafine particle size was resulted from the control of the hydration rate and the decrease of Ti-O-Ti cross-linking extent of titanium precursor, Ti(OCH2CH2OCH3)4, which gives electronic, steric, and weakly chelating effect to titanium ion. Increasing the Ba/Ti mole ratio in reactant could not overcome the notorious Ba-deficiency but, improved stoichiometry and produced finer and less agglomerated particles. Interestingly, adding a slight pressure to autogeneous hydrothermal condition (total 4-10 atm) has yielded near-stoichiometric, highly crystalline, and less agglomerated BaTiO3 particles. These particles, which were in metastable cubic form as synthesized, initiated phasetransition to tetragonal form by calcination at below 400 °C.",
author = "Kyoungja Woo and Choi, {Guang J.} and Sim, {Sang Jun} and Cho, {Young S.} and Kim, {Young D.}",
year = "2000",
month = "9",
day = "1",
doi = "10.1023/A:1004868621334",
language = "English",
volume = "35",
pages = "4539--4548",
journal = "Journal of Materials Science",
issn = "0022-2461",
publisher = "Springer Netherlands",
number = "18",

}

TY - JOUR

T1 - Synthesis and characteristics of near-stoichiometric barium titanate powder by low temperature hydrothermal reaction using titanium tetra(methoxyethoxide)

AU - Woo, Kyoungja

AU - Choi, Guang J.

AU - Sim, Sang Jun

AU - Cho, Young S.

AU - Kim, Young D.

PY - 2000/9/1

Y1 - 2000/9/1

N2 - Near-stoichiometric BaTiO3 powders with ultrafine particle size and high crystallinity were prepared by low temperature hydrothermal reaction of Ba(OAc)2 and Ti(OCH2CH2OCH3)4. BaTiO3 particles were synthesized in the spherical, metastable cubic crystalline grains with size distribution between 60-90 nm in diameter. Ultrafine particle size was resulted from the control of the hydration rate and the decrease of Ti-O-Ti cross-linking extent of titanium precursor, Ti(OCH2CH2OCH3)4, which gives electronic, steric, and weakly chelating effect to titanium ion. Increasing the Ba/Ti mole ratio in reactant could not overcome the notorious Ba-deficiency but, improved stoichiometry and produced finer and less agglomerated particles. Interestingly, adding a slight pressure to autogeneous hydrothermal condition (total 4-10 atm) has yielded near-stoichiometric, highly crystalline, and less agglomerated BaTiO3 particles. These particles, which were in metastable cubic form as synthesized, initiated phasetransition to tetragonal form by calcination at below 400 °C.

AB - Near-stoichiometric BaTiO3 powders with ultrafine particle size and high crystallinity were prepared by low temperature hydrothermal reaction of Ba(OAc)2 and Ti(OCH2CH2OCH3)4. BaTiO3 particles were synthesized in the spherical, metastable cubic crystalline grains with size distribution between 60-90 nm in diameter. Ultrafine particle size was resulted from the control of the hydration rate and the decrease of Ti-O-Ti cross-linking extent of titanium precursor, Ti(OCH2CH2OCH3)4, which gives electronic, steric, and weakly chelating effect to titanium ion. Increasing the Ba/Ti mole ratio in reactant could not overcome the notorious Ba-deficiency but, improved stoichiometry and produced finer and less agglomerated particles. Interestingly, adding a slight pressure to autogeneous hydrothermal condition (total 4-10 atm) has yielded near-stoichiometric, highly crystalline, and less agglomerated BaTiO3 particles. These particles, which were in metastable cubic form as synthesized, initiated phasetransition to tetragonal form by calcination at below 400 °C.

UR - http://www.scopus.com/inward/record.url?scp=0034271941&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034271941&partnerID=8YFLogxK

U2 - 10.1023/A:1004868621334

DO - 10.1023/A:1004868621334

M3 - Article

AN - SCOPUS:0034271941

VL - 35

SP - 4539

EP - 4548

JO - Journal of Materials Science

JF - Journal of Materials Science

SN - 0022-2461

IS - 18

ER -