Low melting oxide glasses prepared at a melt temperature of 500 °C

Abstract

Transparent low-melting inorganic glass is an attractive industrial material based on its high thermal and light resistance compared with conventional engineering plastics. If the melting temperature of inorganic glass could be decreased, the doping of guest materials or compression moulding on the glass surface would be easier. Although phosphate glass is considered as a potential candidate because of its transparency in the visible region and low-melting behaviour, water durability often becomes a problem for implementation. Here, we prepared inorganic low-melting phosphate glass at a temperature of 500 °C via a melting and quenching methodology. It was found that tin-doped phosphate glasses exhibited higher thermal and light resistance properties than polycarbonates. Colourless transparent oxide glasses without organic components are capable of bringing about new possibilities for the application of inorganic glasses.

A solution-processed radiative cooling glass

“…We selected low–melting point phosphate glass particles (a eutectic mixture of different dielectric oxides, including P 2 O 5 , SiO 2 , Al 2 O 3 , Na 2 O, K 2 O, and B 2 O 3 ) to form a framework for the cooling glass coating because of the material’s high durability, low softening temperature ( 39 ), and rich infrared-active vibrational modes, such as Al−O, Si−O, P−O, etc. (fig.…”

“…2D). During sintering, the reduced viscosity of the raw glass, ~100 Pa·s ( 39 ), facilitates rapid merging and bonding of the glass particles. This forms a framework of larger glass clusters (fig.…”

“…S30). We used a theoretical model ( 39 , 41 ) (fig. S31) to estimate that the cooling power of the glass coating is ∼60 W/m 2 (fig.…”

Novel optical amorphous phosphate materials with a low melting temperature

“…Even if the durability towards moisture remains poor, Masai et al have recently reported that tin-containing phosphate glasses could exhibit higher thermal and better resistance to UV light degradation than polycarbonates. 6…”

“…Even if the durability towards moisture remains poor, Masai et al have recently reported that tin-containing phosphate glasses could exhibit higher thermal and better resistance to UV light degradation than polycarbonates. 6 Soft chemistry offers the opportunity to assemble materials of exotic nature via low-temperature processing. [7][8][9] Considerable efforts have already been devoted to silica-based materials to significantly reduce fabrication temperatures using for instance the sol-gel process.…”