This research, which takes a unique approach, investigates the influence of calcination temperatures on the microwave dielectric properties of Ca_0.61M_0.26TiO₃ (M=La³⁺, Nd³⁺) ceramics. The samples were prepared using a conventional solid-state reaction method, with systematic variations in calcination temperatures. The sintering process, a crucial step in sample preparation, was conducted at a sintering temperature for a duration. The study focuses on critical dielectric parameters, such as dielectric constant (ε_r), quality factor (Qf values), and temperature coefficient (τ_fvalues), measured at microwave frequencies. The unique findings of this research highlight the importance of calcination temperatures in determining the ceramics’ phase purity, grain size, and density, thereby influencing their dielectric properties. These original findings, not previously reported, identify optimal calcination temperatures for both Ca_0.61La_0.26TiO₃ and Ca_0.61Nd_0.26TiO₃, with each material exhibiting distinct temperature dependencies due to the different ionic radii and chemical properties of La³⁺ and Nd³⁺. These original results significantly enhance our understanding of how calcination temperature affects microwave dielectric performance, offering essential guidance for developing high-performance dielectric materials for advanced communication technologies.

Keywords: Calcination temperature, Microwave, Dielectric properties, Dielectric materials.