TEM observations on 0.65 Pb (Zr 0.42 Ti 0.58) O 3-0.35 Pb (Ni 0.33 Nb 0.67) O 3 ceramics with CuO additive

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

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The microstructural properties and the chemical compositions of a 0.65Pb(Zr0.42Ti0.58)O3-0.35Pb(Ni 1/3Nb2/3)O3 (0.65PZT58-0.35PNN) ceramic system sintered at 900°C for 4 h with 10 mol% CuO additives were studied using transmission electron microscope (TEM) and energy dispersive spectroscopy (EDS). CuO pockets were found as new microstructural constituents. The liquid phase has formed by the partial melting of CuO additives at the sintering temperature by reacting with Pb element in the matrix. The reaction started at the interfaces and then proceeded into the pocket through the diffusion of the Pb element. The presence of the Pb-rich precipitates during cooling was confirmed by EDS analyses. Cu-rich crystals in the pocket were observed near the boundaries between the matrix grain and the pocket. Rather smaller Pb-Cu-O-contained particle segments were detected around the center of the pocket, demonstrating that the reaction of melting of CuO has occurred with the Pb element which was diffused from the matrix. Due to the existence of the liquid phase, a dense microstructure was achieved during the sintering process and abnormal grain growth occurred in the process.

Original languageEnglish
Pages (from-to)312-317
Number of pages6
JournalJournal of the American Ceramic Society
Volume96
Issue number1
DOIs
Publication statusPublished - 2013 Jan 1

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ceramics
Energy dispersive spectroscopy
Melting
Electron microscopes
Sintering
electron
matrix
Liquids
Grain growth
spectroscopy
Precipitates
liquid
Cooling
Crystals
Microstructure
partial melting
energy
microstructure
melting
Chemical analysis

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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TEM observations on 0.65 Pb (Zr 0.42 Ti 0.58) O 3-0.35 Pb (Ni 0.33 Nb 0.67) O 3 ceramics with CuO additive. / Kim, Young Heon; Ryu, Hyun; Cho, Yang Koo; Lee, Hwack Joo; Nahm, Sahn.

In: Journal of the American Ceramic Society, Vol. 96, No. 1, 01.01.2013, p. 312-317.

Research output: Contribution to journalArticle

Kim, Young Heon ; Ryu, Hyun ; Cho, Yang Koo ; Lee, Hwack Joo ; Nahm, Sahn. / TEM observations on 0.65 Pb (Zr 0.42 Ti 0.58) O 3-0.35 Pb (Ni 0.33 Nb 0.67) O 3 ceramics with CuO additive. In: Journal of the American Ceramic Society. 2013 ; Vol. 96, No. 1. pp. 312-317.
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