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Effect of Excess Li + on Microwave Dielectric Properties of Ca 0.16 Sr 0.04 Li 0.4 Nd 0.4 TiO 3 Ceramics
Author(s) -
Yuan Changlai,
Chen Guohua,
Zhou Changrong,
Yang Yun,
Peng Fuwei
Publication year - 2014
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12228
Subject(s) - materials science , microstructure , dielectric , ceramic , analytical chemistry (journal) , microwave , grain size , mineralogy , metallurgy , optoelectronics , physics , chemistry , chromatography , quantum mechanics
The effect of excess Li + ( δ ) on microstructures and microwave dielectric properties of Ca 0.16 Sr 0.04 Li 0.4 Nd 0.4 TiO 3 ceramics with δ = 0.00125–0.0125 was investigated. XRD analysis showed that lattice parameters in a ‐axis, b ‐axis, and c ‐axis became longer by the addition of small amount of excess Li + . Ca 0.16 Sr 0.04 Li 0.4 Nd 0.4 TiO 3 ceramics with δ = 0.0075 after being sintered at 1270°C showed the optimal values with ε r = 138, Q.f = 1591 GHz, and τ f = 52 ppm/°C. Impedance measurement indicated that the grain regions showed the inhomogeneity in electrical properties and dielectric loss of the ceramic system were mainly derived from the semiconducting grain cores.