The unique glasses produced at the Glass Laboratory are Presented on this page.

1. Glass helps you see Infrared light

This glass is shining when exposing to infrared light. Let's have a look at the photo. On the photo, infrared light (wavelength: 800nm) is coming from the right hand side. This glass does not contain oxygen and the erbium ion is emitting the light. This glass is shining more efficiently with the increase of the intensity of infrared light.

2. Color of glass changes with heating

This glass changes its color with heating. Let's have a look at the photo. On the photo, "RT" means room temperature. The yellow color of the glass is turning gradually into red when heated up from RT to 280℃. The color is going back to yellow with cooling to RT. This change is taking place over and over again. This glass is prepared by cooling the melt of the mixture of tellurium dioxide, iron oxide and sodium carbonate.

3. Color depth gradually varies with the glass cimposition

It is said to be difficult to give warm colors to glass. Warm colors of glass come from light scattering and absorption by colloids of metal or semiconductor. The density and size of the particles determine the color but are very sensitive to the thermal condition during melting glass. So we have to find optimum conditions, such as composition, temperature and melting time, to obtain a desired color. Generally it is a very time-consuming task to investigate a lot of samples one by one. We introduced combinatorial methodology to preprare various compositions of glasses efficiently. The picture shows coloration of P₂O₅-TeO₂-ZnO glasses. The reddish color is brought by colloidal suspention of Te particles. The reddish color is deeper with the increasing content of TeO₂.