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    • 3. 发明公开
    • 무알칼리 유리의 제조 방법
    • 生产非碱性玻璃的方法
    • KR1020100085900A
    • 2010-07-29
    • KR1020107003470
    • 2008-10-16
    • 아사히 가라스 가부시키가이샤
    • 구로키유이치야마모토미네코하야시야스오구시타니히데키마츠모토슈지마에하라데루타카가세준이치로
    • C03B5/225C03B1/00C03C3/091C03C3/087
    • C03B5/225C03C1/00C03C3/091Y02P40/57
    • Disclosed is a method for producing a highly uniform and highly flat non-alkali glass which has few bubbles formed therein. Specifically disclosed is a method for producing a non-alkali glass, which comprises melting a glass raw material comprising a glass base composition raw material containing a silica sand and a boron source and also comprising a clarifying agent and molding the molten material, wherein particles of the silica sand having a Dvalue of 15 to 60 μm and a particle diameter of 100 μm or more make up 2.5 vol% or less of the total volume of the particles of the silica sand, the boron source contains anhydrous boric acid in an amount of 10 to 100 mass% relative to 100 mass% of the total amount of the boron source, SnOis used as the clarifying agent, and the melting of the glass raw material is carried out by the following steps (a) and (b): (a) heating the glass raw material at a temperature at which the viscosity of the molten glass becomes more than 10dPa·s, thereby producing a molten glass; and (b) heating the molten glass at a temperature at which the viscosity of the molten glass becomes 10dPa·s or less and which is higher by 30°C or more than the temperature employed in the step (a), thereby removing air bubbles from the molten glass.
    • 公开了一种在其中形成有少量气泡的高度均匀且高度平坦的无碱玻璃的制造方法。 具体公开了一种无碱玻璃的制造方法,其特征在于,将包含含有硅砂和硼源的玻璃基组合物原料的玻璃原料熔融并且还包含澄清剂并熔融熔融材料,其中, D值为15〜60μm,粒径为100μm以上的硅砂构成硅砂粒子的总体积的2.5体积%以下,硼源含有无水硼酸 相对于硼源总量的100质量%为10〜100质量%,使用SnO 2作为澄清剂,玻璃原料的熔融通过以下的工序(a)和(b)进行:( a)在熔融玻璃的粘度变得大于10dPa·s的温度下加热玻璃原料,从而制造熔融玻璃; 和(b)在熔融玻璃的粘度为10dPa·s以下且比步骤(a)中使用的温度高30℃以上的温度下加热熔融玻璃,除去气泡 从熔融玻璃。