Abstract
Microwave dielectric properties of Ca3Te2Zn3O12 ceramic with garnet structure, synthesized via conventional solid-state ceramic route are studied for the first time. The X-ray diffraction pattern shows that the compound having a garnet structure, belongs to cubic symmetry with Ia-3d space group. Raman and infrared spectroscopic results are in good agreement with group theoretical predictions for the cubic symmetry. Valence states of ions present in Ca3Te2Zn3O12 ceramic are confirmed using X-ray photoelectron spectroscopy. The ceramic sintered at 1100 °C/4 h exhibited maximum densification of 94%, relative permittivity ( $$\varepsilon_{r}$$ ) of 10.9, a quality factor (Qu × f) of 20,340 GHz and a temperature coefficient of resonant frequency ( $$\tau_{f}$$ ) of − 31 ppm/°C at a frequency of 12.6 GHz. The narrow $$A_{1g}$$ mode present in the Raman spectrum can be well correlated with the observed quality factor.
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