TY - JOUR
T1 - New dielectric material system of x(Mg0.95Zn0.05Ti)O3-(1 - x)Ca0.8Sm0.4/3TiO3 at microwave frequency
AU - Chen, Yuan Bin
AU - Huang, Cheng Liang
AU - Tasi, Shin Tung
N1 - Funding Information:
This work was co-supported by the National Science Council of the Republic of China under grand NSC-94-2213-E-006-045.
PY - 2008/6/15
Y1 - 2008/6/15
N2 - The microstructures and the microwave dielectric properties of the x(Mg0.95Zn0.05)TiO3-(1 - x) Ca0.8Sm0.4/3TiO3 ceramic system were investigated. In order to achieve a temperature-stable material, we studied a method of combining a positive temperature coefficient material with a negative one. Ca0.8Sm0.4/3TiO3 has dielectric properties of dielectric constant εr ~ 120, Q × f value ~ 13,800 GHz and a large positive τf value ~ 400 ppm/°C. (Mg0.95Zn0.05)TiO3 possesses high dielectric constant (εr ~ 16.21), high quality factor (Q × f value ~ 210,000 at 9 GHz) and negative τf value (- 59 ppm/°C). Sintering at 1300 °C with x = 0.9, 0.9(Mg0.95Zn0.05Ti)O3 - 0.1 Ca0.8Sm0.4/3TiO3 has a dielectric constant (εr) of 22.7, a Q × f value of 124,000 GHz and a temperature coefficient of resonant frequency (τf) of - 6.3 ppm/°C.
AB - The microstructures and the microwave dielectric properties of the x(Mg0.95Zn0.05)TiO3-(1 - x) Ca0.8Sm0.4/3TiO3 ceramic system were investigated. In order to achieve a temperature-stable material, we studied a method of combining a positive temperature coefficient material with a negative one. Ca0.8Sm0.4/3TiO3 has dielectric properties of dielectric constant εr ~ 120, Q × f value ~ 13,800 GHz and a large positive τf value ~ 400 ppm/°C. (Mg0.95Zn0.05)TiO3 possesses high dielectric constant (εr ~ 16.21), high quality factor (Q × f value ~ 210,000 at 9 GHz) and negative τf value (- 59 ppm/°C). Sintering at 1300 °C with x = 0.9, 0.9(Mg0.95Zn0.05Ti)O3 - 0.1 Ca0.8Sm0.4/3TiO3 has a dielectric constant (εr) of 22.7, a Q × f value of 124,000 GHz and a temperature coefficient of resonant frequency (τf) of - 6.3 ppm/°C.
UR - http://www.scopus.com/inward/record.url?scp=41949140658&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=41949140658&partnerID=8YFLogxK
U2 - 10.1016/j.matlet.2007.12.028
DO - 10.1016/j.matlet.2007.12.028
M3 - Article
AN - SCOPUS:41949140658
SN - 0167-577X
VL - 62
SP - 2454
EP - 2457
JO - Materials Letters
JF - Materials Letters
IS - 16
ER -