Abstract:
This invention relates to the development of strong, highly porous glass-ceramic bodies exhibiting extremely high surface areas such as to render them eminently suitable for catalyst supports designed for use in emissions control systems utilized in combination with internal combustion engines. These bodies are manufactured through a leaching process which provides a surface layer or an entire bulk having a relatively homogeneous porosity with very high surface area wherein the size of the pores can be controlled to a reasonable uniformity.
Abstract:
This invention relates to sound, high strength, laminated articles of glass, glass-ceramic, glass and glass-ceramic materials. Such articles are made by means of a continuous hotforming process wherein glasses are melted for the individual layers and these layers are then simultaneously fused together and shaped into a laminated structure of a desired configuration. Where a glass-ceramic article is desired, the laminated glass structure is subsequently heat treated in a particular manner to cause the glass to crystallize in situ.
Abstract:
This invention relates to the manufacture of translucent-totransparent glass-ceramic articles in the BaO-CaO-Al2O3 composition field which are nucleated with ZrO2 and/or V2O5 and/or Ta2O5. Such articles are thermally stable to temperatures up to about 1,400* C., exhibit good dielectric properties, are resistant to attack by alkali metal vapors, and transmit well in the infrared portion of the spectrum.