Effect of MnO2 Doping on Dielectric Properties of Ba0.7Sr0.3TiO3 Ceramics
DOI:
https://doi.org/10.6919/ICJE.202504_11(4).0044Keywords:
BST Ceramics; MnO2-Doping; Figure of Merit; Dielectric Tunability.Abstract
MnO2-doped BST ceramics were prepared by the solid-state reaction method. The effect of MnO2 doping on the microstructure and dielectric properties of BST ceramic materials was studied. The results indicate that at an MnO₂ doping concentration of x=0.4%, the ceramic exhibits the highest density, the dielectric constant is 4939, the dielectric loss is as low as 0.016, and the dielectric tunability reaches the maximum value (49.57%) under an electric field of 15kV/cm. The figure of merit (FOM) of this sample is as high as 31.8. These findings provide a significant experimental foundation for the design of low-loss and highly adjustable BST ceramics.
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