Characterization and properties of lanthanide based titanium tantalate and aluminate electronic ceramic mixtures

The 0.9LnTiTaO6 + 0.1Ln′AlO3 (Ln = Ce, Pr and Nd and Ln′ = Pr, Nd and Sm) ceramic mixtures are prepared through the solid state ceramic route. The materials are characterized using X-ray diffraction analysis, scanning electron microscopy and energy dispersive spectrometry. The dielectric properties in the radio as well as in the microwave frequencies are measured. The photoluminescence property of a representative sample is also analyzed. The materials have dielectric constant in the range 35.5–28.6, the temperature coefficient of resonant frequency in the range +35 ppm/°C to +14.1 ppm/°C and high quality factor. The measured values of ɛr and τf are compared with the corresponding predicted values calculated using mixture rules. Most of the compositions are useful in the field of optoelectronics and microwave communication.