Structure, and opto-dielectric investigations of Cu2+ -doped calcium bismuth silicate glass ceramics.

CuO inclusive silicate glasses are well known for various semiconductor applications. However, there is a lot of demand and necessity of high efficient opto-dielectric materials. In view of this, the glasses of chemical composition (30 – x) CaO + (10) Bi 2 O 3 + (60) SiO 2 + (x) CuO have been synthesized and studied for their structural, optical and dielectric characterization techniques. Glassy behaviour of CuO undoped glass and ceramic behaviour of all other CuO doped glasses conformed by structural characterization. The elastic modulus and micro hardness of glass and glass ceramics reveal their inter connected covalent structure. Trap depth parameters (T m , E τ , E δ , E ω & μ s) have been determined and analysed under irradiation, and found that 0.3 mol% CuO -doped glass ceramic under 30 kGy of irradiation dose exhibiting better TL output. Dielectric relaxation studies of the glass ceramics suggested that mixed conduction of both ionic and electronic. Observed dielectric results; dielectric constant (ε r), dielectric loss (tanφ), temperature region of relaxation (ΔT), low activation energie's for conduction (E a) and AC Conductivity (σ ac) suggesting that the glass ceramics are dielectric. Optical band gap (E o), transition probability (A t) and emission cross section (σ) corresponding to the emissive transition 3D 1 → 1S 0 assessed by optical techniques. All the results suggests that 0.3 mol% CuO -doped glass ceramic is a useful opto-dielectric resource. • Thermal stability evaluations advised the glasses prepared were hard. • Trap depth parameters of studied glass ceramics under 30 kGy of irradiation dose suggesting, 0.3 mol% CuO-doped glass ceramic is a useful TL asset. • Transition probability and emission cross section corresponding to the emissive transition 3D 1. → 1S 0 assessed by PL technique, suggesting 0.3 mol% CuO-doped glass ceramic is a useful luminescent resource. • Dielectric constant, dielectric loss, temperature region of relaxation low A.E.'s for conduction and AC Conductivity suggesting 0.3 mol% CuO-doped glass ceramic is a useful dielectric. [ABSTRACT FROM AUTHOR]