| 摘要 |
PROBLEM TO BE SOLVED: To obtain a glass composition low in dielectric constant and suitable as a material for forming a dielectric layer of a plasma display panel by increasing the content of B2 O3 in a zinc borosilicate glass. SOLUTION: The low dielectric constant glass has a composition containing, by weight, 25-45% ZnO, 35-55% B2 O3 , 5-13% SiO2 , 0.5-5% Al2 O3 and 2-20% alkali metal oxide. The glass composition has high transmissivity after firing and has <=600 deg.C softening point, 65-85×17<-7> / deg.C coefficient of thermal expansion and the dielectric constant of <=7. The glass composition is suitably used as the dielectric forming material for a gas discharge space of a gas discharge display device. |
