| 摘要 |
Described herein are aluminoborosilicate glass compositions that are substantially alkali-free and exhibit desirable physical and chemical properties for use as substrates in flat panel display devices, such as, active matrix liquid crystal displays (AMLCDs). The glass compositions can be formed into glass sheets by, for example, the float process. When used as substrates, the glass sheets exhibit dimensional stability during processing and damage resistance during cutting. |
| 主权项 |
1. A substantially alkali-free glass, wherein the glass satisfies the following relationships (a)-(c):
[SiO2]+[Al2O3]≦81.3; (a) Σ[RO]/[Al2O3]≦1.3; and (b) a0+a1*[Al2O3]+a2*[B2O3]+a3*[MgO]+a4*[CaO]+a5*[SrO]≦1310 (c)where a0=1710.446, a1=−7.715, a2=−14.847, a3=−17.550, a4=−16.643, and a5=−12.574; and
wherein the glass satisfies at least one of the following relationships (d1) or (d2):
a0+a1*[Al2O3]+a2*[B2O3]+a3*[MgO]+a4*[CaO]+a5*[SrO]≧775 (d1)where a0=847.516, a1=4.747, a2=−10.144, a3=−5.089, a4=−6.837, and a5=−6.548; or
a0+a1*[Al2O3]+a2*[B2O3]+a3*[MgO]+a4*[CaO]+a5*[SrO]≧720 (d2)where a0=774.973, a1=4.886, a2=−9.666, a3=−3.610, a4=−5.840, and a5=−5.713; and
wherein [SiO2], [Al2O3], [B2O3], [MgO], [CaO], and [SrO] represent mole percents of SiO2, Al2O3, B2O3, MgO, CaO, and SrO, respectively, and Σ[RO] equals the sum of mole percents of MgO, CaO, SrO, BaO, and ZnO. |
