Effect of eutectic lithium sulfate-sodium sulfate flux on the synthesis of lead magnesium niobate

K. H. Yoon, Yong Soo Cho, D. H. Kang, K. Uchino, K. Y. Oh

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The effect of the amount of sulfate flux (Li2S04-Na2S04) on the phase stability and dielectric properties of lead magnesium niobate ceramics prepared by molten salt synthesis, has been studied as a function of calcining and sintering temperatures. The percentage of perovskite phase tended to increase with increasing the amount of flux and calcination temperature. When powders containing the same amount of flux with respect to starting oxides were calcined at 750°C for 2 h, the pyrochlore phase was about 2%. Above 800°C, the perovskite phase was stable at about 97% regardless of the amount of flux. However, the increase of the amount of sulfate flux resulted in an increase of the average particle size and a decrease of dielectric constant. These results can be explained by the sinterability and micro-structure analysis.

Original languageEnglish
Pages (from-to)255-264
Number of pages10
JournalFerroelectrics
Volume160
Issue number1
DOIs
Publication statusPublished - 1994 Jan 1

Fingerprint

lithium sulfates
Sodium sulfate
niobates
sodium sulfates
eutectics
Eutectics
Magnesium
magnesium
Lithium
Lead
Fluxes
synthesis
Perovskite
Sulfates
sulfates
Phase stability
molten salts
Dielectric properties
Powders
Calcination

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Yoon, K. H. ; Cho, Yong Soo ; Kang, D. H. ; Uchino, K. ; Oh, K. Y. / Effect of eutectic lithium sulfate-sodium sulfate flux on the synthesis of lead magnesium niobate. In: Ferroelectrics. 1994 ; Vol. 160, No. 1. pp. 255-264.
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Effect of eutectic lithium sulfate-sodium sulfate flux on the synthesis of lead magnesium niobate. / Yoon, K. H.; Cho, Yong Soo; Kang, D. H.; Uchino, K.; Oh, K. Y.

In: Ferroelectrics, Vol. 160, No. 1, 01.01.1994, p. 255-264.

Research output: Contribution to journalArticle

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T1 - Effect of eutectic lithium sulfate-sodium sulfate flux on the synthesis of lead magnesium niobate

AU - Yoon, K. H.

AU - Cho, Yong Soo

AU - Kang, D. H.

AU - Uchino, K.

AU - Oh, K. Y.

PY - 1994/1/1

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N2 - The effect of the amount of sulfate flux (Li2S04-Na2S04) on the phase stability and dielectric properties of lead magnesium niobate ceramics prepared by molten salt synthesis, has been studied as a function of calcining and sintering temperatures. The percentage of perovskite phase tended to increase with increasing the amount of flux and calcination temperature. When powders containing the same amount of flux with respect to starting oxides were calcined at 750°C for 2 h, the pyrochlore phase was about 2%. Above 800°C, the perovskite phase was stable at about 97% regardless of the amount of flux. However, the increase of the amount of sulfate flux resulted in an increase of the average particle size and a decrease of dielectric constant. These results can be explained by the sinterability and micro-structure analysis.

AB - The effect of the amount of sulfate flux (Li2S04-Na2S04) on the phase stability and dielectric properties of lead magnesium niobate ceramics prepared by molten salt synthesis, has been studied as a function of calcining and sintering temperatures. The percentage of perovskite phase tended to increase with increasing the amount of flux and calcination temperature. When powders containing the same amount of flux with respect to starting oxides were calcined at 750°C for 2 h, the pyrochlore phase was about 2%. Above 800°C, the perovskite phase was stable at about 97% regardless of the amount of flux. However, the increase of the amount of sulfate flux resulted in an increase of the average particle size and a decrease of dielectric constant. These results can be explained by the sinterability and micro-structure analysis.

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