Abstract
In this paper, we report the characterization of NdTi0.8M0.2O3.4 (M = Ga, Al) ceramics prepared via mixed oxide solid state sintering route. X-ray diffraction analysis of the samples revealed the formation of single phase for NdTi0.8Ga0.2O3.4 sample while secondary phase was formed in the case of NdTi0.8Al0.2O3.4. Microstructural analysis of the sample showed dense packed grains. NdTi0.8M0.2O3.4 with M = Ga and Al exhibited a dielectric constant (r) = 34, quality factor (Q×f) = 9,776 and 10,867 GHz and temperature coefficient of resonance frequency (τf) = -113 and -90 ppm/oC, respectively. Further work is required on tuning the low τf of the samples for possible applications in the GHz frequency range. Keywords: Ceramics; ABO3.4, Perovskites, Microwave dielectric properties.
Highlights
The explosive development in the modern wireless communication industry such as cellular phones, base stations, wireless LAN, intelligent transport system (ITS) and microwave integrated circuits (MIC) has increased the demand for investigating new dielectric materials [1]
We report the characterization of NdTi0.8M0.2O3.4 (M = Ga, Al) ceramics prepared via mixed oxide solid state sintering route
It is well known that among the three important characteristics of dielectric materials, dielectric losses are of prime importance
Summary
The explosive development in the modern wireless communication industry such as cellular phones, base stations, wireless LAN, intelligent transport system (ITS) and microwave integrated circuits (MIC) has increased the demand for investigating new dielectric materials [1]. These applications require appropriate dielectric constant (εr), low dielectric loss or high quality factor (Q×f ), and near zero temperature coefficient of resonant frequency (τf) for devices such as resonators, filters, duplexers, and oscillators[2]. These parameters show the usage of material in different applications. On the hand, is almost directly proportional to τf (in the absence of any phase transition) and can be controlled by dopants either at A- or B-site of the lattice while τf depends on the tilting schemes [8]
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