TY - JOUR
T1 - Microstructure and microwave dielectric properties of (1 - X)Ca 0.6La 0.267TiO 3-xCa(Mg 1/3Nb 2/3)O 3 ceramics
AU - Xu, Peng
AU - Yang, Jian
AU - Li, Jiamao
AU - Qiu, Tai
PY - 2012/7
Y1 - 2012/7
N2 - (1 - x)Ca 0.6La 0.267TiO 3-xCa(Mg 1/3Nb 2/3)O 3 ceramics were prepared by a conventional solid-state ceramic route. The microstructure and microwave dielectric properties were investigated as a function of composition and sintering temperature. As the content of Ca(Mg 1/3Nb 2/3)O 3 increased, the temperature coefficient of resonant frequency (τ f) value decreased gradually. By appropriately adjusting the x value in the present ceramic system, a near-zero τ f value could be achieved. The appropriate increase of sintering temperature could significantly improve Q·f value by influencing the grain growth. The optimal microwave dielectric properties with a dielectric constant (ε r) of 52.4, Q·f of 36,428 GHz (at 5.8 GHz), and τ f of 3.4 ppm/°C were obtained for the specimen 0.5Ca 0.6La 0.267TiO 3-0.5Ca(Mg 1/3Nb 2/3)O 3 sintered at 1490°C for 4 h.
AB - (1 - x)Ca 0.6La 0.267TiO 3-xCa(Mg 1/3Nb 2/3)O 3 ceramics were prepared by a conventional solid-state ceramic route. The microstructure and microwave dielectric properties were investigated as a function of composition and sintering temperature. As the content of Ca(Mg 1/3Nb 2/3)O 3 increased, the temperature coefficient of resonant frequency (τ f) value decreased gradually. By appropriately adjusting the x value in the present ceramic system, a near-zero τ f value could be achieved. The appropriate increase of sintering temperature could significantly improve Q·f value by influencing the grain growth. The optimal microwave dielectric properties with a dielectric constant (ε r) of 52.4, Q·f of 36,428 GHz (at 5.8 GHz), and τ f of 3.4 ppm/°C were obtained for the specimen 0.5Ca 0.6La 0.267TiO 3-0.5Ca(Mg 1/3Nb 2/3)O 3 sintered at 1490°C for 4 h.
KW - (1 - x)Ca La TiO -xCa(Mg Nb )O
KW - C. Dielectric properties
KW - Ceramics
KW - Complex perovskite
UR - http://www.scopus.com/inward/record.url?scp=84862779221&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2012.01.037
DO - 10.1016/j.ceramint.2012.01.037
M3 - 文章
AN - SCOPUS:84862779221
SN - 0272-8842
VL - 38
SP - 3863
EP - 3867
JO - Ceramics International
JF - Ceramics International
IS - 5
ER -