Ternary tellurite glasses were prepared by a conventional quenching method in the system TeO2-LiO0.5-YO1.5⋅IR spectra reveal that the glasses contain the following polyhedra: deformed TeO6 groups, TeO4-trigonal bipyramids, TeO3-trigonal pyramids, or combinations of these polyhedra. The highly addition of glass-network modifiers, especially Li+ion, leads to a collapse of polyhedra networks. The intense emission peak, due to the transition 4S3/2-4I15/2, was found at 546 nm in tellurite glasses doped with Er3+ under 378 nm and 973 nm excitations at the room temperature. Upon excitation at 973nm, the emission shows a typical upconversion characteristic, indicating the quadratic profiles of the emission intensities against the exciting powers. The emission intensities tend to be dependent upon 378nm excitation, but independent of Er3+ concentration upon 973 nm excitation. The excitation and emission involve two photons process through the 4I11/2 level of Er3+ion. Up conversion fluorescence is, also, enhanced at 547nm by the supplementary doping with Yb3+ion.
|ジャーナル||journal of the japan society of powder and powder metallurgy|
|出版物ステータス||Published - 1995 1 1|
ASJC Scopus subject areas
- Mechanical Engineering
- Industrial and Manufacturing Engineering
- Metals and Alloys
- Materials Chemistry