Details

Autor(en) / Beteiligte

• Sharma, Komal
• Bahel, Shalini

Titel

Effect of Co substitution on the structural, dielectric and reflection properties of MgTiO3 solid solutions

Ist Teil von

• Materials research bulletin, 2023-01, Vol.157, p.112037, Article 112037

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •Single phase MgTiO3 was successfully synthesized using auto-ignition combustion method.•Structural and Dielectric properties of the synthesized samples were improved further by partial Co2+ substitution.•Best dielectric properties were obtained for (CoxMg1-x) TiO3 (x = 0.05) composition having tan δ of 1.7 × 10−3, ɛr of 16.90 and τf of -41.32 ppm/°C at 100 kHz frequency.•Reflection properties of (CoxMg1-x) TiO3 (x = 0.00, 0.025, 0.05, 0.075, 0.10) were reported in Ku band and K band for the first time.•All the compositions except for x = 0.10 possess more than 95% reflection in the entire Ku frequency band. While in the K frequency band, composition x = 0.05 shows the maximum reflection of 90% with bandwidth of 8.50 GHz and 5.95 GHz bandwidth for 95% reflection. Cobalt-substituted magnesium titanate solid solutions with a chemical composition of Cox Mg1-x TiO3, where x = 0.00, 0.025, 0.05, 0.075, 0.10, were synthesized and characterized for their structural, dielectric and reflection properties. The formation of single-phase MgTiO3 was revealed by X-ray diffraction (XRD). A low porosity and tightly packed grains were observed with scanning electron microscopy (SEM). Raman spectroscopy confirmed the presence of the desired modes. The dielectric properties showed that the composition of Cox Mg1-x TiO3 with x = 0.05 possessed a relatively good combination of a relative permittivity (ɛr ) of 16.90, loss tangent (tan δ) of 1.7 × 10 −3, and temperature coefficient of resonant frequency (τf) of -41.32 ppm/°C at 100 kHz. The electromagnetic reflection analysis indicated that this composition could be proposed as a substrate material for antennas, filters and microwave reflectors in the studied frequency range. [Display omitted]