GLASS PLATE, BENT GLASS, LAMINATED GLASS, VEHICULAR WINDOW GLASS, AND WINDOW GLASS FOR CONSTRUCTION

• Main Authors: SAWAMURA SHIGEKI, KAKEGAWA TAKAYUKI, KAJIWARA TAKAHITO
• Format: Patent
• Language: English; Japanese
• Published: 21.05.2024
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; METALLURGY; MINERAL OR SLAG WOOL; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS

To provide a glass plate which satisfies both of excellent crack resistance and excellent heat insulation property.SOLUTION: A glass plate is provided, comprising, in terms of mol% on the basis of oxides, 75.0%≤SiO2≤85.0%, 1.5%≤Al2O3≤7.0%, 0.0%≤MgO≤10%, 0.0%≤CaO≤10%, 0.0%≤SrO≤0.50%, 0.0%≤BaO≤1.0%,0.0%≤Li2O≤10%, 0.0%≤Na2O≤20%, 0.0%≤K2O≤10%, 1.0%≤RO≤10%, 8.0%≤R2O≤22%, 0.030%≤Fe2O3≤1.0%, and RO/R2O≤0.70 (where RO is at least one selected from MgO, CaO, SrO, and BaO; and R2O is at least one selected from Li2O, Na2O, and K2O) and, when the thickness is assumed to be 2.0 mm, the glass plate has a solar transmittance Te, as defined by ISO 9050:2003, of 90% or less.SELECTED DRAWING: None 【課題】本発明は、優れたクラック耐性および遮熱性を両立するガラス板の提供を目的とする。【解決手段】酸化物基準のモル％表示で、７５．０％≦ＳｉＯ２≦８５．０％、１．５％≦Ａｌ２Ｏ３≦７．０％、０．０％≦ＭｇＯ≦１０％、０．０％≦ＣａＯ≦１０％、０．０％≦ＳｒＯ≦０．５０％、０．０％≦ＢａＯ≦１．０％、０．０％≦Ｌｉ２Ｏ≦１０％、０．０％≦Ｎａ２Ｏ≦２０％、０．０％≦Ｋ２Ｏ≦１０％、１．０％≦ＲＯ≦１０％、８．０％≦Ｒ２Ｏ≦２２％、０．０３０％≦Ｆｅ２Ｏ３≦１．０％、ＲＯ／Ｒ２Ｏ≦０．７０（ただし、ＲＯはＭｇＯ、ＣａＯ、ＳｒＯ、ＢａＯから選ばれる少なくとも１種、Ｒ２ＯはＬｉ２Ｏ、Ｎａ２Ｏ、Ｋ２Ｏから選ばれる少なくとも１種）を含有し、厚さを２．０ｍｍに換算したときの、ＩＳＯ－９０５０：２００３で定義される日射透過率Ｔｅが９０％以下である、ガラス板。【選択図】なし