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

Authors
  • Lin, Panpan1
  • Lin, Tiesong1
  • He, Peng1
  • Sekulic, Dusan P.1, 2
  • Zhao, Mengyuan1
  • Wang, Shulei1
  • 1 Harbin Institute of Technology, State Key Laboratory of Advanced Welding and Joining, Harbin, 150001, China , Harbin (China)
  • 2 University of Kentucky, Department of Mechanical Engineering, College of Engineering, Lexington, KY, 40506, USA , Lexington (United States)
Type
Published Article
Journal
Journal of Electronic Materials
Publisher
Springer US
Publication Date
Jan 10, 2017
Volume
46
Issue
4
Pages
2003–2010
Identifiers
DOI: 10.1007/s11664-016-5072-6
Source
Springer Nature
Keywords
License
Yellow

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.

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