Formation of Aluminosilicate Glasses Containing Rare-Earth Oxides

Formation of aluminosilicate glasses containing oxides of rare-earth elements, e.g. Sc, Ce, Pr, Nd, Eu, Gd, Tb, Dy, Ho, Er, and Yb, was studied by melting at 1550°C and air quenching. The upper limit of the amount of rare-earth oxide which can be incorporated into the aluminosilicate glasses decreases according to the lanthanide contraction.     

Characterization of Insoluble Layers Formed by NaOH Attack on the Surface of a ZrO2-Containing Silicate Glass

The durability of an alkali-resistant glass containing ZrO₂ in NaOH solution was studied by scanning electron microscopy. Insoluble Zrrich reaction-product layers ∼1 to 3 μm thick were observed on the surface of glass which had been soaked for 25 d in 2N NaOH at 95°C. In some cases the layer seems to be an adherent film, but in others it adheres loosely to the glass surface and does not seem to effectively block alkali attack .     

Yellow Coatings Produced on Glasses and Aluminum by the Sol-Gel Process

The preparation of CeO₂-TiO₂ coatings by the sol-gel dip-coating process, with curing at 500°C, was studied. The films were brilliant yellow and adherent to soda-lime glass, a PbO-containing glass, and aluminum foil. The transmittance, chromaticity, thickness, phase content, and surface microstructure of the films were determined.