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    Glass substrate for display and method for producing same
    71.
    发明授权
    Glass substrate for display and method for producing same 有权

    公开(公告)号：US11069716B2

    公开(公告)日：2021-07-20

    申请号：US15740906

    申请日：2016-06-28

    申请人： AvanStrate Inc.

    发明人： Manabu Ichikawa

    IPC分类号： H01L27/12 ,  C03C3/091 ,  C03B5/027 ,  C03B25/08 ,  H01L29/786 ,  C03B17/06 ,  C03B25/04 ,  C03C3/093 ,  G02F1/1333 ,  G02F1/1368 ,  H01L27/32

    摘要： Provided are: a glass substrate that achieves a high strain point while having a low devitrification temperature; and a method for producing said glass substrate. This glass substrate for a display is made of a glass comprising SiO2 and Al2O3, comprising 0% or more to less than 3% B2O3 and from 5 to 14% BaO in mass %, and substantially devoiding Sb2O3, wherein the devitrification temperature is 1235° C. or lower and the strain point is 720° C. or higher. Alternatively, this glass substrate for a display is made of a glass comprising SiO2 and Al2O3, comprising 0% or more to less than 3% B2O3, 1.8% or more MgO, and from 5 to 14% BaO in mass %, and substantially devoiding Sb2O3, wherein (SiO2+MgO+CaO)—(Al2O3+SrO+BaO) is less than 42%, the devitrification temperature is 1260° C. or lower, and the strain point is 720° C. or higher. This method for producing said glass substrate for a display comprises: a melting step for melting, by using at least direct electrical heating, a glass material prepared to have a predetermined composition; a forming step for forming, into a flat glass sheet, the molten glass that has been melted in the melting step; and an annealing step for annealing the flat glass sheet, wherein a condition for cooling the flat glass sheet is controlled so as to reduce the heat shrinkage rate of the flat glass sheet.

    GLASS ARTICLE MANUFACTURING METHOD
    72.
    发明申请
    GLASS ARTICLE MANUFACTURING METHOD 有权

    公开(公告)号：US20210122657A1

    公开(公告)日：2021-04-29

    申请号：US16645054

    申请日：2018-08-17

    申请人： Nippon Electric Glass Co., Ltd.

    发明人： Akiyuki TSUKAMOTO ,  Kazuyuki TENYAMA

    IPC分类号： C03B5/027 ,  C03B5/26

    摘要： Provided is a manufacturing method for a glass article, including: a supply step of supplying glass raw materials (4) onto a molten glass (2) accommodated in a melting chamber (3) of a glass melting furnace (1); a melting step of melting the supplied glass raw materials (4) through heating; and an outflow step of causing the molten glass (2) to flow outside the melting chamber (3), wherein the glass raw materials (4) supplied from one screw feeder (5) and another screw feeder (5), which are adjacent to each other out of a plurality of screw feeders (5), extend in parallel through intermediation of a gap (6) on the molten glass (2), and wherein the glass raw materials (4) are melted through heating only with an electrode (8) and an electrode (9) each immersed in the molten glass (2) in the melting chamber (3).

    METHOD FOR PRODUCING GLASS PLATE
    74.
    发明申请
    METHOD FOR PRODUCING GLASS PLATE 审中-公开

    公开(公告)号：US20200325060A1

    公开(公告)日：2020-10-15

    申请号：US16955236

    申请日：2018-12-14

    申请人： Nippon Electric Glass Co., Ltd.

    发明人： Toru SAKURABAYASHI ,  Hiromichi UMEMURA

    IPC分类号： C03B25/12 ,  C03B17/06 ,  C03B5/027 ,  C03B33/02

    摘要： A method of manufacturing a glass sheet stably reduces a variation in a thermal shrinkage rate to 15 ppm or less. The method includes a melting step of melting, in an electric melting furnace, a glass batch prepared so as to give glass comprising 3 mass % or less of B2O3, a forming step of forming a molten glass into a sheet-shaped glass, an annealing step of annealing the sheet-shaped glass in an annealing furnace, and a cutting step of cutting the annealed sheet-shaped glass into predetermined dimensions, to thereby obtain a glass sheet having a β-OH value of less than 0.2/mm and a thermal shrinkage rate of 15 ppm or less. The method includes measuring a thermal shrinkage rate of the glass sheet and adjusting a cooling rate of the sheet-shaped glass in the annealing step depending on variation in thermal shrinkage rate with respect to a target value.