High emittance glass coating material, high emittance glass...

C - Chemistry – Metallurgy – 03 – C

Patent

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C03C 8/16 (2006.01) C03C 8/14 (2006.01) C03C 17/00 (2006.01)

Patent

CA 2257798

A glass paste containing pigment particles of silicon tetraboride each covered with a silica glass film (silica glass layer) having a silicon dioxide content higher than that of the glass structure present at the interface with the pigment particle and a predetermined thickness. In the glass film formed by applying this glass paste to the surface of a substrate and firing it, a silica glass film (silica glass layer) which is relatively lowered in the reactivity with the pigment particle by virtue of its silicon dioxide content higher than that of the glass structure is formed at the interface between each pigment particle and the glass structure. The use of the glass paste effectively prevents a high-radiation glass film wherein a high-radiation pigment is dispersed in a glass structure from undergoing interfacial reactions between the pigment and the glass structure during production and use thereof.

Pâte de verre contenant des particules de pigment de tétraborure de silicium recouvertes chacune par une pellicule de verre de silice (couche de verre de silice) dont la teneur en dioxyde de silicium est supérieure à celle de la structure vitreuse située à l'interface avec la particule de pigment et qui présente une épaisseur prédéterminée. Procédé servant à fabriquer cette pellicule et consistant à appliquer la pâte de verre à la surface d'un substrat et à la cuire, ce qui permet d'obtenir une pellicule de verre de silice (couche de verre de silice) dont la réactivité avec la particule de pigment est relativement limitée, étant donné que sa teneur en dioxyde de silicium est supérieure à celle de la structure vitreuse, au niveau de l'interface entre chaque particule de pigment et la structure vitreuse. L'utilisation de cette pâte de verre empêche la pellicule de verre extrêmement rayonnante, dans laquelle un pigment extrêmement rayonnant est dispersé dans une structure vitreuse, de subir des réactions à l'interface entre le pigment et la structure vitreuse pendant sa fabrication et son utilisation.

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