The effect of two-stage sintering of composition ceramics between (0.6)Mg_0.7Zn_0.3Fe₂O₄ and (0.4)Ba_0.7Sr_0.3TiO₃
on crystal structure, microstructure, electrical and magnetic properties was studied. Samples were sintered
using a two-stage sintering method with the first sintering temperature (T1) at 1350 ºC with different holding
times for 30, 50 and 60 min and cooled down to the second sintering temperature (T2) with sintering temperatures
at 900 °C and 1100 oC for 5 h with heating/cooling rate at 10 ºC/min. It was found that the densities and
shrinkage values tended to slightly increase with the length of holding times at T1. XRD patterns showed a combination
phase between Mg_0.7Zn_0.3Fe₂O₄ and Ba_0.7Sr_0.3TiO₃. The crystallize size and lattice strain were calculated
from XRD patterns and found to increase with T2 sintering. EDX analysis was used to confirm the
elemental composition percentage of (0.6)MZF-(0.4)BST. Examination of the microstructure of composition
ceramics with SEM revealed grain sizes in the range of 0.852-1.877 μm; with, square shaped grains corresponding
to the Mg_0.7Zn_0.3Fe₂O₄ phase and round oval shape corresponding with Ba_0.7Sr_0.3TiO₃phase. Magnetic
behavior and dielectric constant are obviously increased with highly dense ceramics. Finally, the optimal conditions
of two stage sintering were obtained for the holding times of T1 about 50-60 min and the second sintering
temperature of T2 at 900 °C for 5 h.