Abstract
ABSTRACTBi1.5Zn1+xNb1.5O7+x (x = 0.005, 0.01, 0.015, 0.02) ceramics were prepared and the structure, crystal chemistry and dielectric properties were investigated. The results revealed that the samples showed a cubic pyrochlore structure when x ≤ 0.015 mol and the second phase occurred at x = 0.02 mol. With the increase of x, the lattice constant and the average distance R(A-O′) increased and the bond valance theory showed that the AV(O′)[A4] and oxygen ξ parameter of 48f(O) gradually decreased. The dielectric constant decreased and the dielectric loss increased. The activation energy increased from 0.2925eV to 0.3043eV by using the Arrhenius equation.
Published Version
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