ALKALI-FREE GLASS

• Main Authors: NOMURA SHUHEI, ONO KAZUTAKA, AKIYAMA JUN
• Format: Patent
• Language: English; Japanese
• Published: 01.09.2016
• 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

PROBLEM TO BE SOLVED: To provide alkali-free glass that has a high specific elasticity, a high Young's modulus, a high glass transition point, and a low coefficient of linear expansion and can be easily subjected to float molding.SOLUTION: The alkali-free glass has a Young's modulus of 87 GPa and comprises, in mass% on an oxide basis, SiO61-68.5, AlO17-23.5, MgO 6.5-15, and CaO 3-13 with 0.42<MgO/(MgO+CaO)≤0.68.SELECTED DRAWING: None 【課題】高比弾性、かつ、高ヤング率であり、ガラス転移点が高く、線膨張係数が小さく、フロート成形が容易な無アルカリガラスの提供。【解決手段】ヤング率が８７ＧＰａであり、酸化物基準の質量％表示で、ＳｉＯ2６１〜６８．５、Ａｌ2Ｏ3１７〜２３．５、ＭｇＯ ６．５〜１５、ＣａＯ ３〜１３を含有し、０．４２＜ＭｇＯ／（ＭｇＯ＋ＣａＯ）≦０．６８である無アルカリガラス。【選択図】なし