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Journal of Materials Science

, Volume 46, Issue 13, pp 4695–4700 | Cite as

Diffusivity of silver ions in the low temperature co-fired ceramic (LTCC) substrates

  • Chi-Shiung Hsi
  • Yung-Ren Chen
  • Hsing-I Hsiang
Article

Abstract

Diffusion of silver inner-electrode occurred during sintering of commercial low temperature co-fired glass ceramic substrate made the dielectric surface become light yellow. The samples added with silicon oxide (SiO2) powder, however, maintained white color. Silicon-oxide powder was used to modified the sintering behavior and inhibit the silver ions diffusion for the LTCC ceramics. The alumina particles in the LTCC substrates could be regarded as the diffusion barrier of silver ions. The activation energy for silver ions diffusion in the LTCC substrates was 101 kJ/mol. When 5 wt% SiO2 powder was added into the LTCC substrate, the diffusion activation energy of silver ions became 145 kJ/mol. At sintering temperature of 1180 K, the diffusion coefficient of silver ion in the LTCC ceramic substrates with and without additional SiO2 were 8.88 × 10−13 cm2/s and 1.08 × 10−12 cm2/s, respectively.

Keywords

Shrinkage Glassy Phase Silver Content Diffusion Activation Energy Green Tape 

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Department of Materials Science and EngineeringNational United UniversityKung-Ching Li, MiaoLiTaiwan
  2. 2.Department of Resources EngineeringNational Cheng Kung UniversityTainanTaiwan

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