Microstructure and microwave dielectric properties of SnO2-Added Ba(Zn1/3Ta2/3)O3 ceramics

Min Han Kim, Beom Jong Kim, Sahn Nahm, Woo Sung Lee, Myong Jae Yoo, Nam Kee Kang, Hwack Joo Lee, Young Sik Kim, Sun Youn Ryou

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Abstract

The Ba(Zn1/3Ta2/3)O3 (BZT) ceramic normally has a 1 : 2-ordered hexagonal structure, but it changes to the 1 : 1-ordered cubic structure with the addition of SnO2. When SnO 2 was added to the BZT ceramics, grain growth occurred and the liquid phase formed. The liquid phase was responsible for the grain growth. The Q × f value of the BZT ceramic significantly increased with the addition of a small amount of SnO2. Since the degree of 1 : 2 ordering and the relative density decreased with the addition of SnO2, the enhancement of the Q value cannot be explained by the 1 : 2 ordering and the relative density. On the other hand, the improvement of the Q value could be related to the increase in the grain size because the average grain size increased with the addition of SnO2. However, when a large amount of SnO2 was added, the Q value was very low. The low Q value was explained by the low relative density and the presence of a large amount of Ba3Ta 5O15 phase.

Original languageEnglish
Pages (from-to)4259-4262
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume43
Issue number7 A
DOIs
Publication statusPublished - 2004 Jul 1

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Keywords

  • Ba(znta)o
  • Grain growth
  • Liquid phase
  • Q value
  • Sno

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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