| 摘要 |
The present invention relates to an alkali-free glass which satisfies both a high Young's modulus and a high specific modulus, specifically, an alkali-free glass which comprises in mass% on an oxide basis 40-61 SiO2, 15-23.5 Al2O3, 2-20 MgO, and 0.1-40 CaO, and [SiO2]+0.43×[Al2O3]+0.59×[CaO]-74.6≤0 and [SiO2]+0.21×[MgO]+1.16×[CaO]-83.0≤0. |
