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- Title
Influence of multi-component glass on sintering behavior and microwave properties of Zr non-stoichiometricly substituted Ca[(LiNb)]O ceramic.
- Authors
Hu, Mingzhe; Fu, Yang; Zhou, Di; Gu, Haoshuang; Wang, Yu
- Abstract
A low melting point multi-component glass (LiO-BO-SiO-CaO-AlO) was incorporated into Zr non-stoichiometric substituted Ca[(LiNb)]O ceramic to lower its sintering temperature for LTCC applications. The glass acts as liquid phase sintering aid and it can lower the sintering temperature of the ceramic from 1,170 °C to 900 °C. Dense and perovskite solid solutions can be obtained in all glass doped specimens with, however, a small amount of CaNbO-type pyrochlore phase. Raman spectra indicate that the B-site 1:2 ordering structure in Ca[(LiNb)Zr]O ceramic is gradually softened with the increase of the glass content and localized B-site 1:1 ordering domains begin to appear when the glass content reaches 15 wt%. The optimal microwave dielectric properties of ε = 29.37, Qf = 5,420 GHz and τ = −24.9 ppm/°C can be obtained in 5 wt% glass doped Ca[(LiNb)Zr]O ceramic when sintered at 940 °C for 4 h. No chemical reaction exists between Ag and the above ceramic, which indicates itself a potential candidator in LTCC industry.
- Subjects
SINTERING; ZIRCONIUM metallurgy; STOICHIOMETRY; MELTING points; EFFECT of temperature on perovskite; RAMAN effect; LOW Temperature Cofired Ceramic technology
- Publication
Journal of Materials Science: Materials in Electronics, 2012, Vol 23, Issue 10, p1775
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-012-0661-5