摘要:
A molten glass supply device is provided, which can solve unavoidable problems for high viscosity characteristics in connection with the conventional molten glass supply device for high viscosity glass. Such problems include improperly high heating cost caused by excessive heat radiation in a melting furnace, reduction in the grade of products deriving from an excess amount of an erosion foreign material and reduction in the product yield. High viscosity molten glass having a property in which a temperature at which the molten glass exhibits a viscosity of 1000 poise is 1350° C. or higher is supplied to a forming device through a melting furnace, a distribution portion in communication with the outlet of the melting furnace, and a plurality of branch paths branching from the distribution portion. In the branch paths, distribution resistance providing portions that provide distribution resistance to molten glass passed through the branch paths are provided. The supply pressure of the molten glass is equalized when molten glass is distributed from the distribution portion to the branch paths. The distribution portion has a shallower bottom than the melting furnace.
摘要:
A glass having a SiO2—Al2O3—B2O3—RO (RO is at least one of MgO, CaO, BaO, SrO and ZnO) based composition, a temperature corresponding to 102.5 poise being 1570° C. or higher and an alkali content of 0.01 to 0.2% and a ZrO2 content of 0.01 to 0.3%, as expressed in % by mass. And, a glass having a SiO2—Al2O3—B2O3—RO (RO is at least one of MgO, CaO, BaO, SrO and ZnO) based composition, a density of 2.5 g/cm3 or less, an average thermal expansion coefficient of 25 to 36×10−7/° C. in a temperature range of 30 to 380° C., a strain point of 640° C. or higher and an alkali content of 0.01 to 0.2% and a ZrO2 content of not less than 0.01% and less than 0.4%, as expressed in % by mass.
摘要翻译:具有SiO 2 -Al 2 O 3 3 N 2 O 3 O 3的玻璃 SUB > -RO(RO是MgO,CaO,BaO,SrO和ZnO中的至少一种)基组合物,对应于10磅/平方米的温度为1570℃以上,碱含量为0.01 至0.2%,ZrO 2 2含量为0.01〜0.3%,以质量%表示。 而且,具有SiO 2 -Al 2 O 3→3→2 u> O 3的玻璃, / RO(RO是MgO,CaO,BaO,SrO和ZnO中的至少一种)的组成,密度为2.5g / cm 3以下,平均热膨胀系数为25 至36×10 -7 /℃,温度范围为30〜380℃,应变点为640℃以上,碱含量为0.01〜0.2%,ZrO 2 SUB> 2 sub>含量为0.01%以上且小于0.4%,以质量%表示。
摘要:
A manufacturing method for a glass roll includes forming a glass film by a downdraw method, winding the glass film into a roll using a winding roller in a state in which front and back glass surfaces of the glass film formed in said forming operation are exposed, and during said winding operation, superposing the glass film on a separable protective sheet. The protective sheet extends beyond both sides in a width direction of the glass film. The method may further include winding the protective sheet on an outer peripheral surface of the glass film by winding only the protective sheet from a trailing end of the glass film in a winding direction of the glass film.
摘要:
A glass having a SiO2—Al2O3—B2O3—RO (RO is at least one of MgO, CaO, BaO, SrO and ZnO) based composition, a temperature corresponding to 102.5 poise being 1570° C. or higher and an alkali content of 0.01 to 0.2% and a ZrO2 content of 0.01 to 0.3%, as expressed in % by mass. And, a glass having a SiO2—Al2O3—B2O3—RO (RO is at least one of MgO, CaO, BaO, SrO and ZnO) based composition, a density of 2.5 g/cm3 or less, an average thermal expansion coefficient of 25 to 36×10−7/° C. in a temperature range of 30 to 380° C., a strain point of 640° C. or higher and an alkali content of 0.01 to 0.2% and a ZrO2 content of not less than 0.01% and less than 0.4%, as expressed in % by mass.
摘要:
A method of producing a glass having a SiO2—Al2O3—B2O3—RO based composition, where RO is at least one of MgO, CaO, BaO, SrO and ZnO, a melting temperature corresponding to 102.5 poise of 1570° C. or higher and an alkali content of 0.01 to 0.2% and a ZrO2 content of 0.01 to 0.3%, as expressed in % by mass. And, a method of producing a glass having a SiO2—Al2O3—B2O3—RO based composition, where RO is at least one of MgO, CaO, BaO, SrO and ZnO, a density of 2.5 g/cm3 or less, an average thermal expansion coefficient of 25 to 36×10−7/° C. in a temperature range of 30 to 380° C., a strain point of 640° C. or higher and an alkali content of 0.01 to 0.2% and a ZrO2 content of not less than 0.01% and less than 0.4%, as expressed in % by mass.
摘要翻译:一种制备具有SiO 2 -Al 2 O 3 -B 2 O 3 -RO基组合物的玻璃的方法,其中RO是MgO,CaO,BaO,SrO和ZnO中的至少一种,熔化温度对应于1550℃或更高的102.5泊, 碱含量为0.01〜0.2%,ZrO 2含量为0.01〜0.3%,以质量%表示。 另外,制造具有SiO 2 -Al 2 O 3 -B 2 O 3 -RO基组合物的玻璃的方法,其中RO是MgO,CaO,BaO,SrO和ZnO中的至少一种,密度为2.5g / cm 3以下,平均热 膨胀系数为25〜36×10-7 /℃,温度范围为30〜380℃,应变点为640℃以上,碱含量为0.01〜0.2%,ZrO 2含量为 不小于0.01%且小于0.4%,以质量%表示。
摘要:
An alkali-free glass substrate containing, by mass percent, 50-70% of SiO2, 10-25% of Al2O3, 5-20% of B2O3, 0-10% of MgO, 0-15% of CaO, 0-10% of BaO, 0-10% of SrO and 0-5% of ZnO, also containing SnO2 and/or Sb2O3 and having a β-OH value of at least 0.485/mm.
摘要翻译:一种无碱玻璃基板,以质量百分比含有50-70%的SiO 2,10-25%的Al 2 O 3 3, ,5〜20%的B 2 O 3 3,0〜10%的MgO,0〜15%的CaO,0〜10%的BaO,0〜10% 的SrO和0-5%的ZnO,其还含有SnO 2和/或Sb 2 O 3 3,并且具有β-OH值 至少0.485 / mm。
摘要:
A method of producing a glass having a SiO2—Al2O3—B2O3—RO based composition, where RO is at least one of MgO, CaO, BaO, SrO and ZnO, a melting temperature corresponding to 102.5 poise of 1570° C. or higher and an alkali content of 0.01 to 0.2% and a ZrO2 content of 0.01 to 0.3%, as expressed in % by mass. And, a method of producing a glass having a SiO2—Al2O3—B2O3- RO based composition, where RO is at least one of MgO, CaO, BaO, SrO and ZnO, a density of 2.5 g/cm3 or less, an average thermal expansion coefficient of 25 to 36×10−7/° C. in a temperature range of 30 to 380° C., a strain point of 640° C. or higher and an alkali content of 0.01 to 0.2% and a ZrO2 content of not less than 0.01% and less than 0.4%, as expressed in % by mass.
摘要翻译:一种制备具有SiO 2 -Al 2 O 3 -B 2 O 3 -RO基组合物的玻璃的方法,其中RO是MgO,CaO,BaO,SrO和ZnO中的至少一种,熔化温度对应于1550℃或更高的102.5泊, 碱含量为0.01〜0.2%,ZrO 2含量为0.01〜0.3%,以质量%表示。 另外,制造具有SiO 2 -Al 2 O 3 -B 2 O 3 -RO基组合物的玻璃的方法,其中RO是MgO,CaO,BaO,SrO和ZnO中的至少一种,密度为2.5g / cm 3以下,平均热 膨胀系数为25〜36×10-7 /℃,温度范围为30〜380℃,应变点为640℃以上,碱含量为0.01〜0.2%,ZrO 2含量为 不小于0.01%且小于0.4%,以质量%表示。
摘要:
Provided is a method, including: performing heat treatment under a state in which a thick core plate glass (2a) having a higher thermal expansion coefficient and a thin surface-layer plate glass (3a) having a lower thermal expansion coefficient are brought into surface-to-surface contact so that a bonding surface (2x) and (3x) of the core plate glass (2a) and the surface-layer plate glass (3a) attain a close contact state, thereby directly bonding the core plate glass and the surface-layer plate glass (2a) and (3a); then, additionally performing heat treatment so that the surface-to-surface contact portion has a temperature equal to or higher than a lower strain point out of strain points of the core plate glass and the surface-layer plate glass; and then, performing cooling so as to attain a temperature lower than the lower strain point, to thereby form a compression stress in a surface layer portion (3) corresponding to the surface-layer plate glass (3a) and form a tensile stress in a core portion (2) corresponding to the core plate glass (2a).
摘要:
Provided is a method, including: a melting step of melting glass in a melting furnace 2; a distribution step of supplying the molten glass in the melting furnace 2 to a plurality of branched channels 4; and a forming step of supplying the molten glass flowing out from each of the plurality of branched channels 4 to one of a plurality of forming apparatuses 51 to 53 communicating with the plurality of branched channels 4, respectively, and forming the molten glass into a plate-shaped glass by a down-draw method, in which one or more of the plurality of forming apparatuses 51 to 53 are used to form a glass film having a thickness of 1 to 200 μm.
摘要:
To provide a glass roll capable of reliably preventing a glass film from breaking from an end surface of the glass film as an origin of breakage, a glass roll (1) is formed by winding a glass film (2) into a roll while superposing the glass film (2) on a protective sheet (3), the glass film (2) being formed by an overflow downdraw method to have a thickness of 1 μm or more and 200 μm or less, and to have each end surface in a width direction to form a cut surface cut by laser splitting.