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Sintering and Microwave Dielectric Properties of the LiNb 0.63 Ti 0.4625 O 3 Ceramics with the B 2 O 3 –SiO 2 Liquid‐Phase Additives
Author(s) -
Long Yanping,
Wang Yilin,
Wu Wenjun,
Wang Dong,
Li Yongxiang
Publication year - 2009
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2009.03246.x
Subject(s) - materials science , ceramic , sintering , dielectric , microstructure , analytical chemistry (journal) , microwave , phase (matter) , mineralogy , composite material , optoelectronics , chemistry , organic chemistry , telecommunications , computer science
The effect of B 2 O 3 –SiO 2 liquid‐phase additives on the sintering, microstructure, and microwave dielectric properties of LiNb 0.63 Ti 0.4625 O 3 ceramics was investigated. It was found that the sintering temperature could be lowered easily, and the densification and dielectric properties of LiNb 0.63 Ti 0.4625 O 3 ceramics could be greatly improved by adding a small amount of B 2 O 3 –SiO 2 solution additives. No secondary phase was observed for the ceramics with B 2 O 3 –SiO 2 additives. With the addition of 0.10 wt% B 2 O 3 –SiO 2 , the ceramics sintered at 900°C showed favorable microwave dielectric properties with ɛ r =71.7, Q × f =4950 GHz, and τ f =−2.1 ppm/°C. The energy dispersive spectra analysis showed an excellent co‐firing interfacial behavior between the LiNb 0.63 Ti 0.4625 O 3 ceramic and the Ag electrode. It indicated that LiNb 0.63 Ti 0.4625 O 3 ceramics with B 2 O 3 –SiO 2 solution additives have a number of potential applications on passive integrated devices based on the low‐temperature co‐fired ceramics technology.