Uniform coating of nanometer-scale BaTiO 3 layer on spherical Ni particles via hydrothermal conversion of Ti-hydroxide

Jae Young Lee; Seong Hyeon Hong; Jong Heun Lee; Yong Kyun Lee; Jae Young Choi

doi:10.1111/j.1551-2916.2005.00104.x

Uniform coating of nanometer-scale BaTiO ₃ layer on spherical Ni particles via hydrothermal conversion of Ti-hydroxide

Jae Young Lee, Seong Hyeon Hong, Jong Heun Lee, Yong Kyun Lee, Jae Young Choi

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

A uniform BaTiO ₃ nano layer was coated on spherical Ni particles for multilayer ceramic capacitor applications via a Ti-hydroxide coating using the controlled hydrolysis of a TiCl ₄ butanol solution containing (C ₂H ₅) ₂NH (diethylamine, DEA) and its subsequent hydrothermal reaction at various [Ba(OH) ₂], residual [DEA], and hydrothermal temperatures. The hydrothermal conversion was successful at [Ba(OH) ₂] ≥0.065M (Ba/Ti ≥ 1.3) and T ≥ 150°C, and the residual DEA in the Ti-hydroxide coating layer not only affected the formation of the BaTiO ₃ phase but also resulted in a rough surface morphology. When a minimal amount of DEA was involved in the formation of Ti-hydroxide, a uniform BaTiO ₃ coating with a clean surface morphology could be attained, which was confirmed by elemental mapping of the coated powder and the observation of hollow spheres after removing the Ni core. The BaTiO ₃ coating was very effective not only in preventing Ni oxidation but also in shifting the starting point of Ni densification to a higher temperature.

Original language	English
Pages (from-to)	303-307
Number of pages	5
Journal	Journal of the American Ceramic Society
Volume	88
Issue number	2
DOIs	https://doi.org/10.1111/j.1551-2916.2005.00104.x
Publication status	Published - 2005

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

Access to Document

10.1111/j.1551-2916.2005.00104.x

Cite this

@article{250588f20db64498ab7d06a6fd7a9a1f,

title = "Uniform coating of nanometer-scale BaTiO 3 layer on spherical Ni particles via hydrothermal conversion of Ti-hydroxide",

abstract = "A uniform BaTiO 3 nano layer was coated on spherical Ni particles for multilayer ceramic capacitor applications via a Ti-hydroxide coating using the controlled hydrolysis of a TiCl 4 butanol solution containing (C 2H 5) 2NH (diethylamine, DEA) and its subsequent hydrothermal reaction at various [Ba(OH) 2], residual [DEA], and hydrothermal temperatures. The hydrothermal conversion was successful at [Ba(OH) 2] ≥0.065M (Ba/Ti ≥ 1.3) and T ≥ 150°C, and the residual DEA in the Ti-hydroxide coating layer not only affected the formation of the BaTiO 3 phase but also resulted in a rough surface morphology. When a minimal amount of DEA was involved in the formation of Ti-hydroxide, a uniform BaTiO 3 coating with a clean surface morphology could be attained, which was confirmed by elemental mapping of the coated powder and the observation of hollow spheres after removing the Ni core. The BaTiO 3 coating was very effective not only in preventing Ni oxidation but also in shifting the starting point of Ni densification to a higher temperature.",

author = "Lee, {Jae Young} and Hong, {Seong Hyeon} and Lee, {Jong Heun} and Lee, {Yong Kyun} and Choi, {Jae Young}",

year = "2005",

doi = "10.1111/j.1551-2916.2005.00104.x",

language = "English",

volume = "88",

pages = "303--307",

journal = "Journal of the American Ceramic Society",

issn = "0002-7820",

publisher = "Wiley-Blackwell",

number = "2",

}

TY - JOUR

T1 - Uniform coating of nanometer-scale BaTiO 3 layer on spherical Ni particles via hydrothermal conversion of Ti-hydroxide

AU - Lee, Jae Young

AU - Hong, Seong Hyeon

AU - Lee, Jong Heun

AU - Lee, Yong Kyun

AU - Choi, Jae Young

PY - 2005

Y1 - 2005

N2 - A uniform BaTiO 3 nano layer was coated on spherical Ni particles for multilayer ceramic capacitor applications via a Ti-hydroxide coating using the controlled hydrolysis of a TiCl 4 butanol solution containing (C 2H 5) 2NH (diethylamine, DEA) and its subsequent hydrothermal reaction at various [Ba(OH) 2], residual [DEA], and hydrothermal temperatures. The hydrothermal conversion was successful at [Ba(OH) 2] ≥0.065M (Ba/Ti ≥ 1.3) and T ≥ 150°C, and the residual DEA in the Ti-hydroxide coating layer not only affected the formation of the BaTiO 3 phase but also resulted in a rough surface morphology. When a minimal amount of DEA was involved in the formation of Ti-hydroxide, a uniform BaTiO 3 coating with a clean surface morphology could be attained, which was confirmed by elemental mapping of the coated powder and the observation of hollow spheres after removing the Ni core. The BaTiO 3 coating was very effective not only in preventing Ni oxidation but also in shifting the starting point of Ni densification to a higher temperature.

AB - A uniform BaTiO 3 nano layer was coated on spherical Ni particles for multilayer ceramic capacitor applications via a Ti-hydroxide coating using the controlled hydrolysis of a TiCl 4 butanol solution containing (C 2H 5) 2NH (diethylamine, DEA) and its subsequent hydrothermal reaction at various [Ba(OH) 2], residual [DEA], and hydrothermal temperatures. The hydrothermal conversion was successful at [Ba(OH) 2] ≥0.065M (Ba/Ti ≥ 1.3) and T ≥ 150°C, and the residual DEA in the Ti-hydroxide coating layer not only affected the formation of the BaTiO 3 phase but also resulted in a rough surface morphology. When a minimal amount of DEA was involved in the formation of Ti-hydroxide, a uniform BaTiO 3 coating with a clean surface morphology could be attained, which was confirmed by elemental mapping of the coated powder and the observation of hollow spheres after removing the Ni core. The BaTiO 3 coating was very effective not only in preventing Ni oxidation but also in shifting the starting point of Ni densification to a higher temperature.

UR - http://www.scopus.com/inward/record.url?scp=29744447475&partnerID=8YFLogxK

U2 - 10.1111/j.1551-2916.2005.00104.x

DO - 10.1111/j.1551-2916.2005.00104.x

M3 - Article

AN - SCOPUS:29744447475

SN - 0002-7820

VL - 88

SP - 303

EP - 307

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

IS - 2

ER -

Uniform coating of nanometer-scale BaTiO ₃ layer on spherical Ni particles via hydrothermal conversion of Ti-hydroxide

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this