Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing optical glass to prevent the deterioration of a burner used for synthesis of glass particulates composing the optical glass and to obtain the optical glass of stable quality. SOLUTION: The optical glass of ≤0.005 piece/cm 3 per unit volume in the number of residual air bubbles above 0.3 mm. The method for manufacturing a porous body comprises controlling the end face temperature of the burner 10 for glass synthesis by regulating the velocity of flow of combustible gas or combustion supporting gas during the deposition of the glass particulates. The end face temperature of the burner 10 for glass synthesis is regulated to ≤900°C. When the velocity of flow of the combustible gas is defined as vH, the velocity of flow of the combustion supporting gas as vO and the relation therebetween as vH=vOxa, a≤0.2 is set. When the velocity of flow of the combustible gas is defined as VH and the velocity of flow of the combustion supporting gas as VO 0.1≤b≤0.8 is set in the relation therebetween: VO=VH×b. COPYRIGHT: (C)2004,JPO
Abstract in simplified Chinese:〔发明课题〕本发明提供一种对玻璃母材的品质不会造成不良影响,可省略成批间的作业步骤,能够实现制品成本降低的多孔质母材之制造方法及玻璃母材。〔课题解决手段〕针对在具有朝向起始底材来产生玻璃微粒的喷灯及位于该喷灯相对位置的排气机构之设备内,使喷灯沿着该起始底材进行往返移动,将玻璃原料的火焰水解反应所形成的玻璃微粒堆积在起始底材上来制造多孔质母材之方法,其特征为,多孔质母材的堆积结束后,不用去除附着在室内的灰烬就可开始进行下一成批母材的堆积作业。
Abstract:
PROBLEM TO BE SOLVED: To provide a photocatalytic body having high chemical stability and mechanical strength, and further efficiently exhibiting a photocatalytic action, to provide a method for producing the same, and to provide a cleaning device using the photocatalytic body. SOLUTION: Disclosed is the method for producing the porous photocatalytic body where a porous silica glass carrier at least having open cells is produced, and the film of a material to be a photocatalyst is deposited on the surface of the porous silica glass carrier. Also disclosed is the porous photocatalytic body formed of: a porous silica glass carrier at least having open cells; and the film of a material to be a photocatalyst deposited on the surface of the porous silica glass carrier. Also disclosed is the cleaning device at least comprising: a reactor; the above porous photocatalyst stored in the reactor; and an ultraviolet lamp, wherein, while irradiating the porous photocatalytic body with ultraviolet rays by the ultraviolet lamp, the object to be treated is passed through the porous photocatalytic body, and the object to be treated is subjected to cleaning treatment by a photocatalytic action. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method of manufacturing a porous preform by which the cost of a product is reduced by omitting a working process between batches without exerting an adverse influence on the quality of the glass preform and the glass preform. SOLUTION: In the method of manufacturing the porous preform by moving a burner back and forth along a starting base material in an apparatus having the burner for producing glass particles toward the starting base material and a ventilation mechanism at a position opposed to the burner and depositing the glass particles produced by the flame hydrolysis reaction of the glass raw material on the the starting base material, after the deposition of the porous preform is finished, the deposition of a next porous preform is started without removing soot stuck to the inside of the chamber. COPYRIGHT: (C)2005,JPO&NCIPI