Effect of A-site Substitution by Nd~3+ on the Microwave Dielectric Properties of (Pb0.5Ca0.5)(Fe0.5Nb0.5)O3 Ceramics

Abstract

Abstract: Microwave dielectric properties of A-site substitution by Nd³⁺ in (Pb_0.5Ca_0.5)(Fe_0.5Nb_0.5)O₃ system were investigated.
Microwave dielectric properties of [(Pb_0.5Ca_0.5)_1-xNd_x](Fe_0.5Nb_0.5)O₃ (PCNFN) were improved because the solid solution of small amount of surplus Nd³⁺
with (Pb,Ca)²⁺ could eliminate oxygen vacancies. A single perovskite phase was formed when x=0.02. Surplus Nd³⁺ resulted in the formation of secondary
phase (pyrochlore), which can deteriorate to the microwave dielectric properties of PCNFN ceramics. The decreasing of dielectric properties with x content was
mainly caused by the formation of pyrochlore. Dielectric constant was above 100 and quality factor Qf values were 5385～5797GHz as x=0.02～0.05. Temperature
coefficient of resonant frequency (TCF) was changed from positive to negative with the increase of x content.

Key words: （Pb, Ca, Nd）（Fe, Nb）O₃, microwave dielectric ceramics, perovskite

CLC Number:

TQ174

YANG Qiu-Hong,KIM Eung-Soo,XU Jun. Effect of A-site Substitution by Nd~³⁺ on the Microwave Dielectric Properties of (Pb_0.5Ca_0.5)(Fe_0.5Nb_0.5)O₃ Ceramics[J]. Journal of Inorganic Materials.

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Effect of A-site Substitution by Nd~³⁺ on the Microwave Dielectric Properties of (Pb_0.5Ca_0.5)(Fe_0.5Nb_0.5)O₃ Ceramics

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