Characterization of liquid phase in (Na0:5K0:5) NbO3 ceramics with V2O5 additions

Hyun Ryu, Young Heon Kim, Hwack Joo Lee, Yang Koo Cho, Sahn Nahm

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The characterizations of the microstructure and the chemical compositions on (Na0:5K0:5)(Nb0:93V0:07)O 3 ceramics system sintered at 900 °C for 8 h were carried out using high resolution transmission electron microscopy (HRTEM), energy filtered (EF) TEM, and energy dispersive spectroscopy (EDS). The liquid phase was found at the triple junction of the grains and abnormal grain growth occurred in the presence of liquid phase. The liquid phase has formed by the melting of V 2O5 at the sintering temperature. The presence of V element in liquid phase was confirmed by EDS analyses. The interface between the matrix phase and the liquid phase was atomically flat and consists of a stepped ledge structure of one or two atomic height. The KVO3 phase which may be formed during the cooling of the specimens was observed at these interfaces and have a good orientation relation with the matrix.

Original languageEnglish
Pages (from-to)0914051-0914054
Number of pages4
JournalJapanese Journal of Applied Physics
Volume48
Issue number9 Part 1
DOIs
Publication statusPublished - 2009 Dec 1

Fingerprint

liquid phases
ceramics
Liquids
Energy dispersive spectroscopy
ledges
transmission electron microscopy
matrices
High resolution transmission electron microscopy
Grain growth
spectroscopy
energy
sintering
chemical composition
Melting
Sintering
melting
Transmission electron microscopy
Cooling
cooling
microstructure

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Characterization of liquid phase in (Na0:5K0:5) NbO3 ceramics with V2O5 additions. / Ryu, Hyun; Kim, Young Heon; Lee, Hwack Joo; Cho, Yang Koo; Nahm, Sahn.

In: Japanese Journal of Applied Physics, Vol. 48, No. 9 Part 1, 01.12.2009, p. 0914051-0914054.

Research output: Contribution to journalArticle

Ryu, Hyun ; Kim, Young Heon ; Lee, Hwack Joo ; Cho, Yang Koo ; Nahm, Sahn. / Characterization of liquid phase in (Na0:5K0:5) NbO3 ceramics with V2O5 additions. In: Japanese Journal of Applied Physics. 2009 ; Vol. 48, No. 9 Part 1. pp. 0914051-0914054.
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