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Temperature-stable lead-free giant dielectric constant ceramic material
The invention discloses a temperature-stable lead-free giant dielectric constant ceramic material. The chemical composition is (1-x)LiCuNb3O9-xBi(Mg0.5Zr0.5)O3, wherein x is molar ratio and is not less than 0.02 and not more than 0.08; Li2CO3, CuO, Nb2O5, Bi2O3, MgO and ZrO2 with the purity of not less than 99% are taken as original powder and are respectively weighed according to the composition of LiCuNb3O9 and Bi(Mg0.5Zr0.5)O3; main powder is synthesized by ball-milling, mixing and then calcining at 900 DEG C and 750 DEG C respectively for 8h; Bi(Mg0.5Zr0.5)O3 powder is added into the LiCuNb3O9 main powder so that the dielectric constant of LiCuNb3O9-based ceramic is higher than 23000, and particularly when x=0.04, the dielectric constant is higher than 48000, and when the test temperature is 100-250 DEG C, the temperature change rate of the dielectric constant (delta epsilon/epsilon 100 DEG C) is small (within plus or minus 15%). The temperature-stable lead-free giant dielectric constant ceramic material disclosed by the invention has the advantages of simple preparation process and low preparation cost, as well as strong practicality.
Temperature-stable lead-free giant dielectric constant ceramic material
The invention discloses a temperature-stable lead-free giant dielectric constant ceramic material. The chemical composition is (1-x)LiCuNb3O9-xBi(Mg0.5Zr0.5)O3, wherein x is molar ratio and is not less than 0.02 and not more than 0.08; Li2CO3, CuO, Nb2O5, Bi2O3, MgO and ZrO2 with the purity of not less than 99% are taken as original powder and are respectively weighed according to the composition of LiCuNb3O9 and Bi(Mg0.5Zr0.5)O3; main powder is synthesized by ball-milling, mixing and then calcining at 900 DEG C and 750 DEG C respectively for 8h; Bi(Mg0.5Zr0.5)O3 powder is added into the LiCuNb3O9 main powder so that the dielectric constant of LiCuNb3O9-based ceramic is higher than 23000, and particularly when x=0.04, the dielectric constant is higher than 48000, and when the test temperature is 100-250 DEG C, the temperature change rate of the dielectric constant (delta epsilon/epsilon 100 DEG C) is small (within plus or minus 15%). The temperature-stable lead-free giant dielectric constant ceramic material disclosed by the invention has the advantages of simple preparation process and low preparation cost, as well as strong practicality.
Temperature-stable lead-free giant dielectric constant ceramic material
CHEN XIULI (Autor:in) / MA DANDAN (Autor:in) / CHEN JIE (Autor:in) / ZHOU HUANFU (Autor:in) / FANG LIANG (Autor:in)
10.06.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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