Investigations on optical, structural and thermal properties of phosphate glasses containing terbium ions

Densification contribution as a function of strain rate under indentation of terbium-doped aluminophosphate glass

“…All the reagents were introduced in H 3 PO 4 solution at the beginning of the batch preparation process under continuous stirring and dried on a heating plate, until solidification appeared, at around 423 K. This homogenization and drying step is accompanied by the release of gases resulting from chemical reactions that promote the formation of homogeneous metaphosphates, which additionally improves the chemical homogeneity of the final glass [20,24]. Subsequently, the dried mixture was heat treated in an alumina crucible during two sequential steps: (i) at a heating rate of 100 K h -1 from room temperature up to 973 K, to eliminate volatile components, in a Lenton electrical furnace, provided with silicon carbide (SiC) rods and (ii) at a heating rate of 250 K h -1 up to 1523 K with 4 h holding at this temperature to achieve glass melt and refining, in a Nabertherm electrical furnace, using molybdenum disilicide as heating elements.…”

“…The optical, structural, and thermal properties [20], and also phase transformation and microstructure evolution after heat treatment of phosphate glasses containing terbium ions were recently reported [21]. Taking into account the mechanical impact in some of the above-mentioned applications, it has become important to investigate the peculiarities of their mechanical behavior [1,22,23].…”

Effects of ultraviolet excitation on the spectroscopic properties of Sm3+ and Tb3+ doped aluminophosphate glasses

“…Undoped and RE doped (Sm 3+ and Tb 3+ ) aluminophosphate glasses belonging to the oxide system Li 2 O-BaO-Al 2 O 3 -La 2 O 3 -P 2 O 5 were prepared by a wet non-conventional quenching method, using analytical grade reagents: Li 2 CO 3 , BaCO 3 , Al 2 O 3 , La 2 O 3 , H 3 PO 4 , and as precursors for rare-earth ions Sm 2 O 3 and Tb 2 O 3 , respectively, were used [3,4,9].…”

“…Particularly, phosphate glasses possess good thermal stability and transparency that together with other characteristics, such as low melting point, high solubility for RE ions, low refractive index and low dispersion [1,2] make these materials appropriate for photonics. Processed by a wet non-conventional route [3,4], homogeneous doped hosts can be achieved potentiating the use of these materials in the mentioned applications.…”

“…This novel preparation method offers the advantage of an improved chemical homogenization of the melt and of a reduction in the duration of melting and refining, implying lower power consumption [3,4,9]. Additionally, mechanical stirring was applied during the melting process to reduce the content of bubbles and to eliminate the cords from the glass in order to achieve a high optical uniformity.…”