Abstract:
The present invention is to provide a synthetic quartz glass body having a high light transmittance. The present invention provides a synthetic quartz glass body having pores in a surface part thereof.
Abstract:
A process for manufacture of a component made of opaque synthetic quartz glass, and a quartz glass tube manufactured according to said process. The process comprises (i) providing a starting material in the form of granulated material of highly pure, synthetic SiO2 comprising at least partially porous agglomerates of SiO2 primary particles, the granulated material having a compacted bulk density of no less than 0.8 g/cm3, (ii) filling the granulated material into a mold and converting it to an opaque quartz glass preform through a process of melting, and (iii) reshaping the preform in a heat reshaping process to obtain a component made of opaque quartz glass. A quartz glass tube is made of quartz glass consisting of a granulated material of synthetic SiO2 with a lithium content of no more than 100 wt-ppb, and the wall thickness of said component being in the range of 0.5 mm to 15 mm.
Abstract:
Disclosed is a quartz glass product of enhanced opacity manufactured by fusion of silica particles, the opacity being enhanced by the reaction of an organosilicon additive in the course of the fusion process. A method of enhancing the opacity of a quart glass product by fusing silica particles in the presence of an organosilicon additive is also disclosed.
Abstract:
Opaque silica glass having a density of 2.0 to 2.18 g/cm.sup.3, sodium and potassium elements concentrations in the silica glass of each 0.5 ppm or less and an OH group concentration of 30 ppm or less, and containing bubbles which are independent bubbles having the following physical values: a bubble diameter of 300 .mu.m or less, and a bubble density of 100,000 to 1,000,000 bubbles/cm.sup.3, and a production process for opaque silica glass, including: filling quartz raw material grain having a particle size of 10 to 350 .mu.m in a heat resistant mold, heating it in a non-oxidizing atmosphere from a room temperature up to a temperature lower by 50 to 150.degree. C. than a temperature at which the above raw material grain is melted at a temperature-raising speed not exceeding 50.degree. C./minute, then, slowly heating it up to a temperature higher by 10 to 80.degree. C. than the temperature at which the quartz raw material grain is melted at the speed of 10.degree. C./minute or less, and cooling after maintaining at the above temperature.
Abstract translation:密度为2.0〜2.18g / cm 3的不透明二氧化硅玻璃,二氧化硅玻璃中的钠和钾元素浓度为0.5ppm以下,OH基浓度为30ppm以下,并且含有具有以下的独立气泡的气泡 物理值:气泡直径为300μm以下,气泡密度为100,000〜1,000,000个气泡/ cm 3,以及不透明石英玻璃的制造方法,其特征在于,填充粒径为10〜350μm的石英原料粒子 在耐热模具中,将其在非氧化性气氛中从室温加热到低于50-150℃的温度,而不是以不升温速度将上述原料颗粒熔化的温度 超过50℃/分钟,然后缓慢加热至高于10℃至80℃的温度,高于石英原料颗粒以10℃/分钟或更低的速度熔化的温度, 并保持冷却 在上述温度下。
Abstract:
Molded bodies of quartz glass have at least one surface area of transparent quartz glass, the exposed surfaces of which are smooth and which have a surface microroughness of less than 8 .mu.m. The base material has a chemical purity of at least 99.9% and a cristobalite content of no more than 1%; is gas-impermeable and opaque; and contains pores. At a wall thickness of 1 mm, the base material has a nearly uniform direct spectral transmission of less than 10% in the wavelength range of .lambda.=190-2,650 nm; and which has a density of at least 2.215 g/cm.sup.3. The transparent surface area is formed from base material by heating it to a temperature above 1,650.degree. C. The thickness of the transparent layer is at least 0.5 mm, and its direct spectral transmission in the wavelength range of .lambda.=6001-2,650 nm is at least 60% for a layer thickness of 1 mm.
Abstract:
出発基材に向けてガラス微粒子を発生させるバーナ及び該バーナと対向する位置に排気機構を有する装置内にて、該出発基材に沿ってバーナを往復移動させ、出発基材上にガラス原料の火炎加水分解反応で生成したガラス微粒子を堆積させて多孔質母材を製造する方法において、多孔質母材の堆積が終了した後、チャンバー内に付着したススを除去することなく、次の母材の堆積を開始することを特徴とする。チャンバー内の最小内圧P min が、装置内外の差圧で−80P a ≦P min ≦−40P a の範囲にあるように調整されてもよい。
Abstract:
A method for producing an optical glass exhibiting a stabilized quality while preventing deterioration of a burner being used for synthesizing fine glass particles composing the optical glass. An optical glass in which the number of residual bubbles having a diameter of 0.3 mm or above is not larger than 0.005 pieces/cm3 (per volume) is provided. Such an optical glass is produced by regulating the flow velocity or the flow rate of a combustible gas or a combustion assisting gas during deposition of fine glass particles thereby controlling the end face temperature of the burner for synthesizing glass.
Abstract translation:一种光学玻璃的制造方法,其具有稳定的质量,同时防止用于合成构成光学玻璃的微细玻璃微粒的燃烧器的劣化。 提供了其直径为0.3mm以上的残留气泡的个数为0.005个/ cm 3以下的光学玻璃。 这样的光学玻璃是通过在沉积微细玻璃颗粒期间调节可燃气体或助燃气体的流速或流速来制造的,从而控制用于合成玻璃的燃烧器的端面温度。