The structural, microstructural,
and microwave dielectric properties
of Ba1–x
Sr
x
Ti4O9, (0.0 ≤ x ≤
0.06) ceramics samples synthesized by a conventional route were investigated.
These structural, microstructural, and dielectric properties were
recorded using X-ray diffraction (XRD), scanning electron microscopy
(SEM), and Fourier transform infrared (FTIR) and impedance analyzer
spectroscopies. Ti–O octahedral distortion was observed due
to Sr2+ addition. The microwave dielectric properties were
interrelated with various Sr2+ concentrations. Excellent
microwave dielectric properties, i.e., high relative permittivity
(ϵr = 71.50) and low dielectric loss (tan δ
= 0.0006), were obtained.