Structural characteristics of nanocrystalline ZrO₂powder sol–gel derived to luminescent applications

Preparation methods of thermoluminescent materials for dosimetric applications: An overview

“…This powder is then submitted to a thermal treatment in order to stabilize the traps . Another method for preparing ZrO 2 is the sol-gel technique (Rivera et al, 2007b) which consists in dissolving zirconium propoxyde and propanol in double-distilled deionized water at room temperature and adding a water soluble salt of the dopant in the desired concentration. The components are stirred in order to obtain a uniform and homogeneous solution.…”

Synthesis and Thermoluminescent Characterization of Ceramics Materials

“…Keller (Keller, 1995)] has been described a parallel beam XRD method developed for determining the percent crystallinity of fully crystalline and "fully amorphous" powders. Rivera et al (Rivera et al, 2007d) reported of analyzing on structural characterization of ZrO 2 powders, using a Siemens D5000 diffractometer employing nickel-filtered Cu Kα radiation (λ = 1.5406 Å, 40 kV, 30 mA) at 0.020° intervals in the range 20° ≤ 2θ ≤ 75° with 1s count accumulation per step directly from the catalyst foils.. Their contribution on structural and morphological on X-ray diffraction patterns of ZrO 2 powder obtained by the sol-gel method and submitted to thermal treatment at 700°C for 10 h in air were relevant. The paper shows the diffraction patterns suggested a monoclinic phase of Zirconia.…”

“…Several methods have been described for determining the phase composition and the amorphous of ceramics (Rivera et al, 2007d). Extremely interesting is the characterization of these ceramic materials from the structural by means of X-ray diffraction and morphological by means of scanning electron microscopy methods, with the aim of fully understanding the reasons for their macroscopic properties, and of being able to examine the possibility of modifying and improving them.…”

“…These dopants present in thermoluminescent phosphors induce higher luminescence efficiency either due to better incorporation of activator ions or due to improvement in energy transfer processes . Doping with ion activators of the thermoluminescent phosphors resulted in increasing the TL sensitivity from 1.2 to 3.4 times, when compared with that of the TL phosphors without ion dopant (Rivera et al, 2007d;J. Zhang et al, 2002).…”

“…When carefully hydrolyzed, metal alkoxide derivatives produce molecular entities containing oxo-and/or hydroxo-bridges, they can associate themselves via hydrolysis and cross-condensation reactions to form macromolecular networks. In recent decades, zirconia dioxide (ZrO 2 ) has attracted great interest due to its extensive practical applications as a structural ceramic (Rivera et al, 2007d).…”