Microstructural and Dielectric Characterization of MgO-added Al₂O₃-based Ceramics in the Terahertz Range
DOI:
https://doi.org/10.5281/zenodo.17973311Anahtar Kelimeler:
Terahertz, Terahertz zaman-alanı spektroskopisi, Alüminyum oksit, Dielektrik özelliklerÖzet
This study investigates the effect of MgO addition on the microstructural and dielectric properties of Al2O3 ceramics. The dielectric properties of Al2O3-based ceramics with MgO addition were investigated in the terahertz (THz) range. The fabricated ceramic composites are characterized utilizing THz time-domain spectroscopy (THz-TDS). The relative density reached 99.5% with the addition of MgO, while the particle size decreased significantly. Although microstructural analysis indicated a more homogeneous distribution, complete effectiveness could not be achieved. THz-TDS measurements revealed that MgO-added samples exhibited a higher dielectric constant, lower absorption coefficient, and reduced loss tangent. These findings confirm that, although MgO cannot entirely suppress grain growth, it effectively reduces dielectric losses and enhances the suitability of Al2O3-based ceramics for terahertz applications.
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