A5086441565- Luminescence Properties of Advanced Materials
- Glass properties and applications
- Solid State Laser Technologies
- Pigment Synthesis and Properties
- Nuclear materials and radiation effects
- Phase-change materials and chalcogenides
- Optical properties and cooling technologies in crystalline materials
- Dental Implant Techniques and Outcomes
- Solid-state spectroscopy and crystallography
- Photorefractive and Nonlinear Optics
- Crystal Structures and Properties
- Advanced Chemical Sensor Technologies
- Bone Tissue Engineering Materials
- Isotope Analysis in Ecology
Universidade Federal do Maranhão
2014-2024
Universidade Estadual de Maringá
2008-2013
In this work, thermal and optical properties of the commercial Q-98 neodymium-doped phosphate glass have been measured at low temperature, from 50 to 300 K. The time-resolved lens spectrometry together with interferometry relaxation calorimetry methods were used investigate athermal characteristics described by temperature coefficient path length change, ds/dT. diffusivity was also determined, coefficients electronic polarizability, linear expansion, refractive index calculated explain ds/dT...
Abstract The Nd 3+ ‐doped CaO‐Al 2 O–B O 3 ‐CaF glasses were prepared by melt‐quenching technique and their optical, spectroscopic, thermo‐optical properties studied. density refractive index showed an increase with addition of at the expense CaO. electronic polarizability increases concentration due to in NBO . absorption spectra present characteristic bands transitions from ground state 4 I 9/2 various excited states. luminescence show emission ~880 nm ( F 3/2 → ) ~1064 11/2 ), which up...
The time evolution of infrared stimulated luminescence has been systematically investigaed in potassium feldspar and albite minerals subjected to different doses gamma irradiation (ranging from 0 8 kGy). Experimental results reveal a 300-600 nm signal which is greatly intensified for irradiated samples, following the same dose dependence observed thermoluminescence. intensity disappears after few seconds illumination, proportional (1 + Bt)-P. influence both B P factors upon analysed.
In this study, 10CaF 2 – (29.5 0.4x)CaO (60 0.6x)B O 3 xTeO 0.5Yb (with x = 10, 16, 22, 31, and 54% mol) glasses were synthesized. The structural thermal properties of the samples investigated by X-ray diffraction, density, FTIR, Raman, Vickers microhardness, TG/DTA, specific heat, expansion. mirror was used to determine diffusivity conductivity. results discussed as a function TeO content. increase caused an in volumetric density decrease microhardness values due substitution CaO B for . By...