Low temperature sintering of BaCu(B2O5)-added BaO-Re2O3-TiO2 (Re = Sm, Nd) ceramics

Min Han Kim, Jong Bong Lim, Sahn Nahm, Jong Hoo Paik, Hwack Joo Lee

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

The sintering temperature of BaSm2Ti4O12 (BST) and BaNd2Ti5O14 (BNT) ceramics was approximately 1350 °C and decreased to 875 °C with the addition of BaCu(B2O5) (BCB) ceramic powder. The presence of the liquid phase was responsible for the decrease of the sintering temperature. The liquid phase is considered to have a composition similar to the BaO-deficient BCB. The bulk density and dielectric constant (εr) of the specimens increased and reached saturated value with increasing BCB content. The Q-value initially increased with the addition of BCB, but decreased considerably when a large amount of BCB was added, because of the presence of the liquid phase. Good microwave dielectric properties of Q × f = 4500 GHz, εr = 60 and τf = -30 ppm/°C were obtained for the 16.0 mol% BCB-added BST ceramics sintered at 875 °C for 2 h. Moreover, the BST and BNT ceramics containing BCB show good compatibility with silver metal.

Original languageEnglish
Pages (from-to)3033-3037
Number of pages5
JournalJournal of the European Ceramic Society
Volume27
Issue number8-9 SPEC. ISS.
DOIs
Publication statusPublished - 2007

Bibliographical note

Funding Information:
This work was supported by the Ministry of Commerce, Industry and Energy and one of the authors also acknowledges the financial support provided by the Ministry of Science and Technology through the NRL Project.

Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.

Keywords

  • BaO-(Sm,Nd)O-TiO
  • Dielectric properties
  • Sintering

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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