@article{HUANG2017, author = {Xianpei HUANG and Xinyu LIU and Fei LIU and Changlai YUAN and Jingjing QU and Jiwen XU and Changrong ZHOU and Guohua CHEN}, title = {Microstructures and microwave dielectric properties of (Ba1−xSrx)4(Sm0.4Nd0.6)28/3Ti18O54 solid solutions}, year = {2017}, journal = {Journal of Advanced Ceramics}, volume = {6}, number = {1}, pages = {50-58}, keywords = {microwave dielectric properties, tungsten bronze type, high permittivity}, url = {https://www.sciopen.com/article/10.1007/s40145-016-0217-x}, doi = {10.1007/s40145-016-0217-x}, abstract = {(Ba1−xSrx)4(Sm0.4Nd0.6)28/3Ti18O54 (x = 0.02, 0.04, 0.06, 0.08, 0.1) solid solutions were prepared by the conventional solid-state reaction process. It was found that (Ba1−xSrx)4(Sm0.4Nd0.6)28/3 Ti18O54 ceramics are fully composed of BaSm2Ti4O12 and BaNd2Ti5O14 phases for all the compositions. The increasing x value (0.02 ≤ x ≤ 0.1) in (Ba1−xSrx)4(Sm0.4Nd0.6)28/3Ti18O54 ceramics can not only obtain high Q × f value but also effectively enhance the permittivity ( εr). The (Ba1−xSrx)4(Sm0.4Nd0.6)28/3Ti18O54 ceramic with x = 0.08, sintered at 1440 ℃ for 4 h, shows excellent microwave dielectric properties of permittivity ( εr) ≈ 93.19, quality factor (Q × f) ≈ 9770.14 GHz (at 3.415 GHz), and almost near-zero temperature coefficient of resonant frequency ( τf) ≈ +4.56 ppm/℃.} }