TY - JOUR AU - Khan, Akbar AU - Ali, Asif AU - Khan, Izaz PY - 2021/11/09 Y2 - 2024/03/29 TI - Sintering behavior and microwave dielectric properties of CaTi1-x(Nb1/2Al1/2)xO3 JF - Synthesis and Sintering JA - Synth. Sinter. VL - 1 IS - 4 SE - Articles DO - 10.53063/synsint.2021.1467 UR - https://synsint.com/index.php/synsint/article/view/67 SP - 197-201 AB - CaTi1-x(Nb1/2Al1/2)xO3 with x=0.1–0.5 ceramics were processed  through solid state sintering. X-rays diffraction (XRD) patterns of the compositions showed that the samples have orthorhombic crystal structure with symmetry (Pbnm). The symmetry was further confirmed using Raman spectroscopy. A total of 13 Raman modes were detected, which were in agreement with the XRD results. Microstructure analysis of the samples showed porosity in the samples, presumably due to the substitution of Al, having high melting point. As the concentration of Al and Nb increased, relative permittivity (er), quality factor (Q×fo) and temperature coefficient of resonance frequency decreased. Optimum microwave dielectric properties were achieved for the composition x=0.5 sintered at 1650 °C for 8 h i.e., er ~27.09, Q×fo ~17378 GHz, and tf ~ -2.5 ppm/°C. ER -