Effect of rare-earth dopants on the thermal behavior of tungsten–tellurite glasses

Investigation on thermal and microstructural characterization of the TeO2–WO3 system

“…Tellurite glasses have been investigated extensively due to their favorable physical and chemical properties such as, relatively lowphonon energy, high refractive index, high dielectric constant, good infrared transmissivity, low glass transition and melting temperature, thermal and chemical stability and high devitrification resistance [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Owing to these numerous properties, tellurite glasses have become preferable host materials for some infrared and infrared to visible upconversion applications in optical data storage, lasers, sensors and spectroscopic devices [5][6][7][8]11,[14][15][16][17][18][19][20].…”

“…Owing to these numerous properties, tellurite glasses have become preferable host materials for some infrared and infrared to visible upconversion applications in optical data storage, lasers, sensors and spectroscopic devices [5][6][7][8]11,[14][15][16][17][18][19][20]. TeO 2 is the main but a conditional glass former; therefore, the addition of a secondary component such as heavy metal oxides, alkalis or halogens increases the glass forming ability [5][6][7][8]. The addition of WO 3 to tellurite glasses provides advantageous properties such as, doping in a wide range, modifying the composition by a third, fourth, and even fifth component, controlling the optical properties, enhancing the chemical stability and devitrification resistance of the glass [1,2,5].…”

“…The addition of WO 3 to tellurite glasses provides advantageous properties such as, doping in a wide range, modifying the composition by a third, fourth, and even fifth component, controlling the optical properties, enhancing the chemical stability and devitrification resistance of the glass [1,2,5]. In comparison to other tellurite glasses, tungsten-tellurite glasses have slightly higher phonon energy and higher glass transition temperature, therefore they can be used at high optical intensities without exposure to thermal damage [7,8,16,21].…”

Upconversion white luminescence of TeO2:Tm3+/Er3+/Yb3+ nanoparticles

“…Selecting a suitable host is a key factor for upconversion luminescent materials. It is well known that TeO 2 (optical fibers, crystals and glassy) are suitable host materials due to their lower phonon frequency, chemical durability and thermal stability [20][21][22][23][24][25][26][27][28][29]. The conventional processing is using bulk TeO 2 or TeO 2 glasses as the host materials for preparing upconversion luminescent materials [9,30,31] [31].…”

Co-effects of Tm 2 O 3 and porous silica on reversible hydrogen storage in NaAlH 4

“…There are three methods for preparing porous material and metal hydrides mixtures: the impregnation method [31,33], the melt infiltration [29,31] method and the mechanical ball milling method [34e37]. Preparing the hydride and organic agent mixture via impregnation is complex and melt infiltration requires high hydrogen pressure before heating.…”