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CN107417071A 制造含孔隙的不透明石英玻璃的方法 有权

制造含孔隙的不透明石英玻璃的方法
摘要：
本发明涉及制造含孔隙的不透明石英玻璃的方法。具体地，在制造含孔隙的不透明石英玻璃的已知方法中，提供下列方法步骤：(a)由合成生产的SiO2制造多孔SiO2颗粒状粒子，(b)热致密化所述SiO2颗粒状粒子以形成部分致密化的SiO2颗粒状粒子，(c)由所述部分致密化的SiO2颗粒状粒子形成分散体，(d)研细所述分散体中的所述部分致密化的SiO2颗粒状粒子以形成含有研细的SiO2颗粒状粒子的粉浆，(e)将所述粉浆成型为成型体并形成具有生坯密度ρG的多孔SiO2生坯，和(f)将所述SiO2生坯烧结成不透明石英玻璃。由此出发，为了指出一种也适合使用喷雾颗粒的通过粉浆浇注制造不透明石英玻璃的工序，根据本发明建议，在方法步骤(b)的热致密化过程中，制造具有0.025至2.5平方米/克的比表面积BET-(A)的部分致密化的SiO2颗粒状粒子，并在方法步骤(d)的研细过程中，制造具有4至10平方米/克的比表面积BET-(B)的研细的SiO2颗粒状粒子。
摘要（英）：

A method for producing a pore-containing opaque quartz glass includes: (a) producing porous SiO2 granulate particles from synthetically produced SiO2, (b) thermally densifying the SiO2 granulate particles to form partly densified SiO2 granulate particles, (c) forming a dispersion from the partly densified SiO2 granulate particles, (d) comminuting the partly densified SiO2 granulate particles to form a slip containing comminuted SiO2 granulate particles, (e) shaping the slip into a shaped body and forming a porous SiO2 green body with a green density rG, and (f) sintering the SiO2 green body into opaque quartz glass. To produce opaque quartz glass that is also suited for the use of spray granulate, during step (b), partly densified SiO2 granulate particles are produced with a specific surface BET-(A) between 0.025 and 2.5 m2/g, and during step (d), comminuted SiO2 granulate particles are produced with a specific surface BET-(B) between 4 and 10 m2/g.

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