Glass plate and window
AssigneeAGC Inc.
InventorsEriko MAEDA, Takato KAJIHARA, Kensuke NAGAI, Yutaka KUROIWA, Osamu KAGAYA, Ryuta SONODA, Hiroyuki HIJIYA
Life of this patent
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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.
Claims14
1-28. (canceled)
A glass plate having a radio transmittance of at least 20% at a frequency of 100 GHz as calculated as 18 mm thickness, and having a composition which comprises, as represented by mol % based on oxides:
- 63
- ≦
- SiO
- 2
- ≦
- 75
- ;
- 0.5
- ≦
- Al
- 2
-
- O
- 3
- ≦
- 3.5
- ;
- 0
- ≦
- B
- 2
-
- O
- 3
- ≦
- 15
- ;
- 0.1
- ≦
- MgO
- ≦
- 4
- ;
- 0
- ≦
- CaO
- ≦
- 20
- ;
- 0
- ≦
- SrO
- ≦
- 3
- ;
- 0
- ≦
- BaO
- ≦
- 3
- ;
- 0
- ≦
- Li
- 2
-
- O
- ≦
- 6.5
- ;
- 0.1
- ≦
- Na
- 2
-
- O
- ≦
- 8
- ;
- 0.1
- ≦
- K
- 2
-
- O
- ≦
- 8
- ;
- 0
- ≦
- ZrO
- 2
- ≦
- 2
- ;
- 0.001
- ≦
- Fe
- 2
-
- O
- 3
- ≦
- 0.3
- ;
- 0.001
- ≦
- TiO
- 2
- ≦
- 0.1
- ;
- 0
- ≦
- PbO
- <
- 0.001
- and
- 0
- ≦
- CeO
- 2
- ≦
- 0
- .3
- ,
- such that the composition satisfied
- 1.1
- ≦
- R
- 2
-
- O
- ≦
- 20
- ;
- 0.1
- ≦
- RO
- ≦
- 20.1
- ;
- 3.8
- ≦
- 7
-
- Al
- 2
-
- O
- 3
- +
- 3
-
- MgO
- ≦
- 23.5
- ;
- 0.05
- ≦
- Na
- 2
-
- O
- /
- R
- 2
-
- O
- ≦
- 0.8
- ;
- 0.05
- ≦
- K
- 2
-
- O
- /
- R
- 2
-
- O
- ≦
- 0.6
- ;
- and
- 63.5
- ≤
- SiO
- 2
- +
- Al
- 2
-
- O
- 3
- ≤
- 7
-
- 8
- .
- 5
- ,
- where RO is a total content of MgO, CaO, SrO and BaO, and
- R2O is a total content of Li2O, Na2O and K2O.
Dependencies are inferred from the claim text.