TY - JOUR
T1 - Microstructure and microwave dielectric properties of xSm(Mg 0.5Ti0.5)O3-(1 - X)Ca0.8Sr 0.2TiO3 ceramics
AU - Yao, Lichun
AU - Qiu, Tai
AU - Wan, Wei
AU - Yang, Jian
PY - 2014/9
Y1 - 2014/9
N2 - xSm(Mg0.5Ti0.5)O3-(1 - x)Ca 0.8Sr0.2TiO3 (x = 0.50-0.95) ceramics are prepared by a conventional solid-state ceramic route. The microstructure and microwave dielectric properties are investigated as a function of the x-value and sintering temperature. The single phase solid solutions were obtained throughout the studied compositional range. The variation of bulk density and dielectric properties are related with the x-value. Increasing sintering temperature can effectively promote the densification and dielectric properties of xSm(Mg0.5Ti0.5)O3-(1 - x)Ca 0.8Sr0.2TiO3 ceramic system. With the content of Sm(Mg0.5Ti0.5)O3 increasing, the temperature coefficient of resonant frequency τf value decreased, and a near-zero τf could be obtained for the samples with x = 0.80. The optimal microwave dielectric properties with a dielectric constant εr of 30.1, Q × f of 115,000 GHz (at 8.0 GHz), and τf of 8.9 ppm/°C were obtained for 0.80Sm(Mg 0.5Ti0.5)O3-0.20Ca0.8Sr 0.2TiO3 sintered at 1,550 °C for 3 h, which showed high density and well-developed grain growth.
AB - xSm(Mg0.5Ti0.5)O3-(1 - x)Ca 0.8Sr0.2TiO3 (x = 0.50-0.95) ceramics are prepared by a conventional solid-state ceramic route. The microstructure and microwave dielectric properties are investigated as a function of the x-value and sintering temperature. The single phase solid solutions were obtained throughout the studied compositional range. The variation of bulk density and dielectric properties are related with the x-value. Increasing sintering temperature can effectively promote the densification and dielectric properties of xSm(Mg0.5Ti0.5)O3-(1 - x)Ca 0.8Sr0.2TiO3 ceramic system. With the content of Sm(Mg0.5Ti0.5)O3 increasing, the temperature coefficient of resonant frequency τf value decreased, and a near-zero τf could be obtained for the samples with x = 0.80. The optimal microwave dielectric properties with a dielectric constant εr of 30.1, Q × f of 115,000 GHz (at 8.0 GHz), and τf of 8.9 ppm/°C were obtained for 0.80Sm(Mg 0.5Ti0.5)O3-0.20Ca0.8Sr 0.2TiO3 sintered at 1,550 °C for 3 h, which showed high density and well-developed grain growth.
UR - http://www.scopus.com/inward/record.url?scp=84905815804&partnerID=8YFLogxK
U2 - 10.1007/s10854-014-2127-4
DO - 10.1007/s10854-014-2127-4
M3 - 文章
AN - SCOPUS:84905815804
SN - 0957-4522
VL - 25
SP - 4046
EP - 4050
JO - Journal of Materials Science: Materials in Electronics
JF - Journal of Materials Science: Materials in Electronics
IS - 9
ER -