An influence of a Glass Braze Composition on the Properties of Li-Ti Ferrite Joints

Panpan Lin, Tiesong Lin, Peng He, Dusan P. Sekulic, Mengyuan Zhao, Shulei Wang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The influence of the chemical composition of Bi2O3-B2O3-SiO2-ZnO glass brazes on (i) the microstructure, (ii) the mechanical and (iii) the dielectric properties of Li-Ti ferrite joints was systematically investigated. The Bi5(Ti3Fe)O15 whisker and a white block phase consisting of Bi12SiO2 and Bi24B2O39 were observed in the joints of Li-Ti ferrite/Bi25-Ba and Li-Ti ferrite/glass brazes, respectively, containing a higher content of Bi2O3. No crystalline phase was detected in the Li-Ti ferrite/Bi25 and Li-Ti ferrite/Bi20 joints. The joint strength reached the maximum of 48 MPa in the Li-Ti ferrite/Bi25-Ba couples. It is assumed that this is mainly due to the strengthening effect of Bi5(Ti3Fe)O15 whiskers. The bonding temperature (700°C) had little effect on the dielectric properties of Li-Ti ferrite. Moreover, compared to the Bi25-Ba glass brazes, the Bi25 and Bi20 glass brazes had a less pronounced influence on the dielectric properties of joints. Different glass brazes can be tailored to different requirements depending on specific application and joint property requirements.

Original languageEnglish
Pages (from-to)2003-2010
Number of pages8
JournalJournal of Electronic Materials
Volume46
Issue number4
DOIs
StatePublished - Apr 1 2017

Bibliographical note

Publisher Copyright:
© 2017, The Minerals, Metals & Materials Society.

Keywords

  • BiO-BO-SiO-ZnO glass braze
  • Li-Ti ferrite
  • dielectric constant
  • dielectric loss tangent
  • joint strength
  • microstructure

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering

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