TY - JOUR
T1 - Dielectric properties of (1-x)(Mg0.95Co0.05)TiO3-xCaTiO3 ceramic system at microwave frequency
AU - Huang, Cheng Liang
AU - Pan, Chung Long
AU - Hsu, Jui Feng
N1 - Funding Information:
This work was co-supported by the National Science Council of the Republic of China under grant NSC90-2213-E-006-061 and the Foundation of Jieh-Chen Chen Scholarship, Tainan, Taiwan.
PY - 2002/12/1
Y1 - 2002/12/1
N2 - The microwave dielectric properties and the microstructures of the (1-x)MgTiO3-xCaTiO3 ceramic system were investigated. With partial replacement of Mg by Co, dielectric properties of the (1-x)(Mg0.95Co0.05)TiO3-xCaTiO3 ceramics can be promoted. The microwave dielectric properties are strongly correlated with the sintering temperature. At 1275°C, the 0.95(Mg0.95Co0.05)TiO3-0.05CaTiO3 ceramics possesses excellent microwave dielectric properties: a dielectric constant r of 20.3, a Q×f value of 107000 (at 7GHz) and a τf value of -22.8ppm/°C. By appropriately adjusting the x value in the (1-x)(Mg0.95Co0.05)TiO3-xCaTiO3 ceramic system, zero τf value can be achieved. With x=0.07, a dielectric constant γ of 21.6, a Q×f value of 92000 (at 7GHz) and a τf value of -1.8ppm/°C was obtained for 0.93(Mg0.95Co0.05)TiO3-0.07CaTiO3 ceramics sintered at 1275°C for 4h.
AB - The microwave dielectric properties and the microstructures of the (1-x)MgTiO3-xCaTiO3 ceramic system were investigated. With partial replacement of Mg by Co, dielectric properties of the (1-x)(Mg0.95Co0.05)TiO3-xCaTiO3 ceramics can be promoted. The microwave dielectric properties are strongly correlated with the sintering temperature. At 1275°C, the 0.95(Mg0.95Co0.05)TiO3-0.05CaTiO3 ceramics possesses excellent microwave dielectric properties: a dielectric constant r of 20.3, a Q×f value of 107000 (at 7GHz) and a τf value of -22.8ppm/°C. By appropriately adjusting the x value in the (1-x)(Mg0.95Co0.05)TiO3-xCaTiO3 ceramic system, zero τf value can be achieved. With x=0.07, a dielectric constant γ of 21.6, a Q×f value of 92000 (at 7GHz) and a τf value of -1.8ppm/°C was obtained for 0.93(Mg0.95Co0.05)TiO3-0.07CaTiO3 ceramics sintered at 1275°C for 4h.
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U2 - 10.1016/S0025-5408(02)00792-4
DO - 10.1016/S0025-5408(02)00792-4
M3 - Article
AN - SCOPUS:0036896203
SN - 0025-5408
VL - 37
SP - 2483
EP - 2490
JO - Materials Research Bulletin
JF - Materials Research Bulletin
IS - 15
ER -