Abstract
The impact of Zn substitution on structural, dielectric, and reflection properties of the pure MgTiO3 and 0.96 ZnxMg1−xTiO3–0.04 SrTiO3, x = 0.00, 0.05, and 0.075 ceramics was investigated. These ceramics were prepared by the sol–gel technique. X-ray diffraction examination has confirmed the formation of MgTiO3 as a major phase in all the prepared samples. Rietveld refinements disclosed that the MgTiO3 phase had trigonal symmetry with space group R−3. Raman spectroscopy confirmed the presence of 10 Raman-active modes in all the compositions. These modes were shifted toward higher wavenumber with the increase in Zn concentration from x = 0.00 to x = 0.075. Dielectric characterization showed that for a similar increase of Zn concentration, the relative permittivity (εr) increased from 14.75 to 20.42, loss tangent (tan δ) decreased from 1.15 × 10–2 to 1.12 × 10–3, and temperature coefficient of resonant frequency (τf) increased from − 50.34 to 3.56 ppm/°C at a frequency of 100 kHz. The best combination of dielectric properties was observed for composition 0.96 Zn0.05Mg0.95TiO3–0.04 SrTiO3 (95 MZST) with εr = 17.43, tan δ = 0.97 × 10–3 GHz, and τf = 3.11 ppm/°C at a frequency of 100 kHz and sintering temperature of 1200 °C. In the Ku-band (12.4 to 18.0 GHz), the study of reflection properties suggested that all the considered samples possess reflection of 90% or higher with an effective bandwidth of 4.20 GHz. While in the K-band (18.0 to 26.5 GHz), the results obtained from reflection analysis showed that the composition 95 MZST at sample thicknesses of 2.0 mm has more than 90% reflection with an effective bandwidth of 4.70 GHz. Owing to low-to-medium εr, low tan δ, near-zero τf, and good reflection properties, the prepared 0.96 Zn0.05Mg0.95TiO3–0.04 SrTiO3 composition can be used for 5G wireless communication.
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This work is financially supported by the Ministry of Electronics and Information Technology (MeitY), Government of India. [Grant No. MEITY-PHD-2742].
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KS contributed to synthesis and characterization, software, data analysis, and writing. HK and SB involved in review and edit and supervised the whole manuscript…
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Sharma, K., Kaur, H. & Bahel, S. Structural, dielectric, and reflection characterization of 0.96 ZnxMg1−xTiO3–0.04 SrTiO3 ceramics. J Mater Sci: Mater Electron 33, 22374–22387 (2022). https://doi.org/10.1007/s10854-022-09015-w
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DOI: https://doi.org/10.1007/s10854-022-09015-w