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发明授权
CN105384335B 无碱玻璃 有权

无碱玻璃
摘要：
本发明提供具有高应变点、并且显示出可控的蚀刻速率的无碱玻璃。一种无碱玻璃，以基于氧化物的摩尔％计，含有SiO267～77％、Al2O38～16％、B2O30.1～2.9％、MgO 2～6.5％、CaO 5.5～12.5％、SrO 0～8％和BaO 2～6％，MgO+CaO+SrO+BaO为10～17.5％，(MgO+CaO+SrO+BaO)/Al2O3为2.2以下，MgO/CaO为0.7以下，HF重量减少量为0.16(mg/cm2)/分钟以下，应变点为705℃以上，50～350℃下的平均热膨胀系数为41.5×10‑7/℃以下，比重为2.61g/cm3以下，且杨氏模量为78GPa以上。
摘要（英）：

The invention provides alkali-free glass which has a high strain point and displays a controllable etching rate. The alkali-free glass contains 67-77% of SiO[2], 8-16% of Al[2]O[3], 0.1-2.9% of B[2]O[3], 2-6.5% of MgO, 5.5-12.5% of CaO, 0-8% of SrO and 2-6% of BaO by mol % based on oxides. MgO+CaO+SrO+BaO accounts for 10-17.5%. (MgO+CaO+SrO+BaO)/Al[2]O[3] is lower than 2.2. MgO/CaO is lower than 0.7. Weight decrease in HF is lower than 0.16(mg/cm<2>) per minute. The strain point is above 705 DEG C. An average thermal expansion coefficient below 50-350 DEG C is 41.5*10<-7>/DEG C. The specific gravity is below 2.61g/cm<3>, and a Young modulus is above 78GPa.

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