Abstract
The effect of MgO doping (in which Bi3+ or Zn2+ substituted by Mg2+) on the structure and dielectric properties of α-BZN ceramics are investigated. X-ray diffraction patterns show that (Bi1.5Zn0.5)(Zn0.5−xMgxNb1.5)O7 ceramics have an only cubic pyrochlore structure (α-BZN), while the secondary phase is found even with the addition of 0.05 mol Mg2+ for (Bi1.5−xMgxZn0.5)(Zn0.5Nb1.5)O7 ceramics. With the increasing of Mg content, the grain size of (Bi1.5−xMgxZn0.5)(Zn0.5Nb1.5)O7 increases while the (Bi1.5Zn0.5)(Zn0.5−xMgxNb1.5)O7 has no obvious change. All the compositions exhibit a typical relaxation behavior with strong frequency dispersion in the low-temperature range. The degree of frequency dispersion can be measured by △Tm = Tm (1MHz)-Tm (100 kHz).
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
