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US 12,448,321 B2Granted
Glass plate and window
AssigneeAGC Inc.
InventorsEriko Maeda, Takato Kajihara, Kensuke Nagai, Yutaka Kuroiwa, Osamu Kagaya, Ryuta Sonoda, Hiroyuki Hijiya
Life of this patent
Estimating the term…
Abstract
To provide a glass plate for a window material and a window comprising the glass plate, which are less likely to be a barrier to radio transmitting/receiving in use of a radio-utilizing apparatus, and a radio communication apparatus comprising the glass plate. A glass plate having a radio transmittance of at least 20% at a frequency of 100 GHz as calculated as 18 mm thickness, a window comprising the glass plate, and a radio communication apparatus comprising the glass plate.
Claims19
A glass plate, comprising:
- a glass having a composition including 55≤SiO2≤73.56, 1.44≤Al2O3≤9, 6.0≤B2O3≤13, 0≤MgO≤15, 0≤CaO≤20, 0≤SrO≤15, 0≤BaO≤1, 0.01≤Li2O≤19.1, 0≤Na2O≤16,
- 0.9≤K2O≤16, 0≤ZrO2≤2, 0.001≤Fe2O3≤5, 0.001≤TiO2≤5, 0≤PbO<0.001, and 0≤ZnO≤3 such that the 0.91≤R2O≤20, 0≤RO≤20, 56.44≤SiO2+Al2O3≤75, 85≤SiO2+Al2O3+MgO+CaO+SrO+BaO+Li2O+Na2O+K2O+Fe2O3+TiO2≤100, 10<7Al2O3+3MgO-4Li2O≤66, and 0≤Na2O/R2O≤0.8, by mol % based on oxides, where R2O is a total content of alkali metal oxides, and RO is a total content of MgO, CaO, SrO, and BaO,
- wherein the glass plate has a radio transmittance of at least 20% at a frequency of 100 GHz as calculated as 18 mm thickness.
Dependencies are inferred from the claim text.