Effects of Chemical Compositions on Electrical Properties of Low Temperature Co-fired Alumina Ceramics with Built-in Silver Electrodes

• Shigeno Koichi

  National Institute of Technology, Ube College Graduate School of Science and Engineering, Yamaguchi University

• Asakawa Tadashi

  National Institute of Technology, Ube College

• Kuraoka Yuto

  National Institute of Technology, Ube College

• Fujimori Hirotaka

  Graduate School of Science and Engineering, Yamaguchi University

Abstract

Recent studies by the authors have been intended to develop sintering additives that can make alumina sintered at low temperature with a small quantity. In the case of use of CuO-TiO₂-Nb₂O₅-Ag₂O type additives, high-density alumina was obtained by firing at a temperature of 900℃ or below, even though additives content was only 5mass%. In this study, co-firing of above materials with Ag-electrodes at 900℃ or below was examined in order to clarify the relationship between chemical compositions and their reactivity. The results showed that reactivity was highly affected by the Ag₂O content in the sintering additives. When the content of Ag₂O was higher, any disappearance of Ag-electrodes was not found and electric properties were almost the same as those of conventional LTCC materials. Finally, these results indicated the obtained materials had possibility to be applied to LTCC modules having high thermal conductivity.

Journal

• Transactions of the Materials Research Society of Japan

  Transactions of the Materials Research Society of Japan 41 (1), 121-126, 2016

  The Materials Research Society of Japan

Keywords

• alumina
• sintering additive
• co-firing
• Ag-electrode
• LTCC
• high thermal conductivity

Details

• CRID: 1390282680488547200
• NII Article ID: 130005126123
• DOI: 10.14723/tmrsj.41.121
• ISSN: 21881650
• ISSN: 13823469
• Web Site: https://www.jstage.jst.go.jp/article/tmrsj/41/1/41_121/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed