Coating of TiO2 nanolayer on spherical Ni particles using a novel sol-gel route

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

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

A nano-thin TiO2 layer was uniformly coated on spherical Ni particles for applications in multilayer ceramic capacitors via a controlled hydrolysis process using TiCl4, (C2H5)2NH (diethylamine, DEA), and C4H9OH as Ti-source, gradual (OH)- former, and solvent, respectively. At the constant [DEA]/[TiCl4] = 10.6, the Ti-hydroxide could be coated uniformly using the dilute source solution ([TiCl4] ≤ 0.2 M) while the Ti-hydroxide powder in a separated form was frequently observed at [TiCl4] ≥ 0.4 M. A uniform coating was attained at the slower precipitation, and the kinetics of precipitation was controlled by tuning the trace amount of water in the solution. The TiO2-coating not only prevented Ni oxidation but also retarded the sintering between the Ni particles to a large extent.

Original languageEnglish
Pages (from-to)1669-1675
Number of pages7
JournalJournal of Materials Research
Volume19
Issue number6
DOIs
Publication statusPublished - 2004 Jun 1

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Particles (particulate matter)
hydroxides
Sol-gels
routes
gels
Ceramic capacitors
coatings
Coatings
hydrolysis
Hydrolysis
capacitors
sintering
Multilayers
Sintering
Tuning
tuning
ceramics
Powders
Oxidation
oxidation

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Coating of TiO2 nanolayer on spherical Ni particles using a novel sol-gel route. / Lee, Jae Young; Hong, Seong Hyeon; Lee, Jong Heun; Lee, Yong Kyun; Choi, Jae Young.

In: Journal of Materials Research, Vol. 19, No. 6, 01.06.2004, p. 1669-1675.

Research output: Contribution to journalArticle

Lee, Jae Young ; Hong, Seong Hyeon ; Lee, Jong Heun ; Lee, Yong Kyun ; Choi, Jae Young. / Coating of TiO2 nanolayer on spherical Ni particles using a novel sol-gel route. In: Journal of Materials Research. 2004 ; Vol. 19, No. 6. pp. 1669-1675.
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