Title:
ALKALI-FREE GLASS AND GLASS SHEET
Document Type and Number:
WIPO Patent Application WO/2023/162788
Kind Code:
A1
Abstract:
A purpose of the present invention is to provide an alkali-free glass which has a low dielectric loss tangent in a high-frequency region and is excellent in terms of acid resistance, moisture resistance, and phase separation property. The present invention relates to an alkali-free glass comprising, in terms of oxide amount in mol%, 50-76 SiO2, 2-6 Al2O3, 18-35 B2O3, 1-6 MgO, 0.5-5 CaO, 1-5 SrO, and 0-3 BaO and having a value of expression (A) of 3.5-6, a value of expression (B) of -2 to 2, a value of expression (J) of 0.2-0.7, and a value of Δβ-OH of 0 mm-1 to 0.1 mm-1.
Inventors:
HAMADA YUYA (JP)
TOKUNAGA HIROFUMI (JP)
TOKUNAGA HIROFUMI (JP)
Application Number:
PCT/JP2023/005070
Publication Date:
August 31, 2023
Filing Date:
February 14, 2023
Export Citation:
Assignee:
AGC INC (JP)
International Classes:
C03C3/091; C03B25/00
Domestic Patent References:
| WO2020209271A1 | 2020-10-15 | |||
| WO2020100834A1 | 2020-05-22 | |||
| WO2020150422A1 | 2020-07-23 | |||
| WO2020184175A1 | 2020-09-17 |
Attorney, Agent or Firm:
EIKOH, P.C. (JP)
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