Optically transparent Er^3＋-doped tellurite-based nanocrystallized glasses with the composition of 70TeO2.15Li2O·15Nb2O5·0.5Er2O3 （mol） have been prepared bv a conventional melting quenching and the subse...Optically transparent Er^3＋-doped tellurite-based nanocrystallized glasses with the composition of 70TeO2.15Li2O·15Nb2O5·0.5Er2O3 （mol） have been prepared bv a conventional melting quenching and the subsequent heat treatment processes. The sizes of grown nanocrystals in glass matrix appear to be 35-50 nm from the X-ray diffraction （XRD） measurement. The microhardness measurement shows that the Vickers hardness values of the nanoerystallized tellurite glasses are larger （33%-62%） than those in the base glass. The Raman spectra imply that the maximum phonon energy of the based glass decreases and shifts from 668 to 638 cm^-1 after heat-treatment. Visible upconversion luminescence and infrared luminescence of the base glass and heat-treated glasses under 980-nm laser diode （LD） excitation are investigated. The 524-, 546- and 656-nm upconversion intensities by 980-nm pumping increase significantly.展开更多
基金This work was supported by the National Natural Science Foundation of China (No. 60207006)Shanghai"Qimingxing" Project (No. 04QMX1448)
文摘Optically transparent Er^3＋-doped tellurite-based nanocrystallized glasses with the composition of 70TeO2.15Li2O·15Nb2O5·0.5Er2O3 （mol） have been prepared bv a conventional melting quenching and the subsequent heat treatment processes. The sizes of grown nanocrystals in glass matrix appear to be 35-50 nm from the X-ray diffraction （XRD） measurement. The microhardness measurement shows that the Vickers hardness values of the nanoerystallized tellurite glasses are larger （33%-62%） than those in the base glass. The Raman spectra imply that the maximum phonon energy of the based glass decreases and shifts from 668 to 638 cm^-1 after heat-treatment. Visible upconversion luminescence and infrared luminescence of the base glass and heat-treated glasses under 980-nm laser diode （LD） excitation are investigated. The 524-, 546- and 656-nm upconversion intensities by 980-nm pumping increase significantly.
