公开(公告)号：US20130337992A1

公开(公告)日：2013-12-19

申请号：US13911473

申请日：2013-06-06

Applicant: HOYA CORPORATION

Inventor： Yoshiko KASUGA ,  Kazuo TACHIWANA ,  Hiroaki YANAGITA

IPC: C03C3/062

CPC classification number: C03C3/062 ,  Y10S501/901

Abstract: A method of making a press-moldable glass, including melting starting materials, forming a melt, and annealing a formed glass, wherein the melt has a composition such that, (1) when rapidly cooled to room temperature, it becomes glass that has a scattering coefficient of less than 0.005 cm-1 at wavelengths of from 400 to 2,500 nm or comprises crystals with a volumetric ratio of less than 10-6, and (2) when maintained for three hours at a temperature 10° C. higher than the glass transition temperature, maintained for 10 min at a temperature yielding a viscosity of 104.5 to 103.5 dPa·s, and then rapidly cooled to room temperature, (3) the resulting glass has (a) a scattering coefficient of at least one wavelength from 400 to 2,500 nm of greater than 0.01 cm-1 or (b) crystals with a volumetric ratio of greater than 10-5. A temperature for annealing is lower than for glass transition.

Abstract translation: 一种制造可压制玻璃的方法，包括熔融起始材料，形成熔体并退火成形的玻璃，其中熔体具有如下组成：（1）当快速冷却至室温时，其变为具有 在波长为400至2500nm的散射系数小于0.005cm -1，或包含体积比小于10-6的晶体，和（2）当在比10℃高10℃的温度下保持3小时时 玻璃化转变温度，在104.5〜103.5dPa·s的粘度下保持10分钟，然后迅速冷却至室温，（3）得到的玻璃的（a）至少一个波长的散射系数为400 到2500nm大于0.01cm -1或（b）体积比大于10-5的晶体。 退火温度低于玻璃化转变温度。