Abstract: Provided is a phosphate glass that has a low melting point and has excellent water resistance while maintaining a glass structure. This phosphate glass PGS has a glass transition temperature Tg lower than 490° C. and contains, in oxide-based mol %, 55-65 [mol %] of P2O5, 10-27 [mol %] of ZnO, 0.5-7 [mol %] of R2O3 ((R2O3 is at least one of Al2O3, Ga2O3, and Y2O3), 0.5-3.5 [mol %] of a lanthanoid oxide L2O3(L2O3 is at least one of La2O3, Ce2O3, Pr2O3, Nd2O3, Pm2O3, Sm2O3, Eu2O3, Gd2O3, Tb2O3, Dy2O3, Ho2O3, Er2O3, Tm2O3, Yb2O3, and Lu2O3), and 4-15 [mol %] of X2O (X2O is at least one of Li2O, Na2O, K2O, Rb2O, Cs2O, and Fr2O).

Abstract: A glass includes a first glass portion and a second glass portion. The first glass portion has a higher ion packing density than the second glass portion (has a composition that forms a glass in which, out of plastic deformation characteristics, plastic flow is dominant). The second glass has a lower ion packing density than the first glass portion (has a composition that forms a glass in which, out of the plastic deformation characteristics, densification is dominant).

Abstract: A glass composition for lamps includes the following by weight percent: SiO2: 60-75 wt %; CeO2+Ce2O3: 0.01-5.2 wt %; SnO+SnO2: 0.01-5.2 wt %; Al2O3: 0.5-6 wt %; B2O3: 0-5 wt %; Li2O+Na2O+K2O: 13-20 wt %; MgO: 0.5-5 wt %; CaO: 1-10 wt %; SrO: 0-10 wt %; BaO: 0-10 wt %; ZnO: 0-10 wt %; Fe2O3+FeO: 0-0.2 wt %; and TiO2: 0-1 wt %. The glass composition for lamps that contains no lead or antimony achieves high ultraviolet screening capacity, ensuring fewer occurrences of initial coloring and ultraviolet ray caused coloring of glass.

Abstract: The present invention provides: a method for producing high silicate glass which has a low Fe concentration and can achieve a high UV transmittance while retaining advantages of Vycor glass that mass-production at low cost is feasible and that complex formation with various photofunctional ions can be effected; and high silicate glass of a high UV transmittance. For obtaining the above high silicate glass, the method is characterized by comprising the steps of: heating borosilicate glass including a heavy metal or rare-earth element (preferably a high-valence heavy metal or rare-earth element) so as to phase-separate the borosilicate glass; subjecting the phase-separated borosilicate glass to acid treatment so as to elute a metal; and sintering the acid-treated borosilicate glass.

Abstract: The present invention provides a process for producing a luminescent glass, comprising the steps of adsorbing, to a porous high silica glass, at least one metal component selected from the group consisting of elements of Groups IIIA, IVA, VA, VIA, VIIA, VIII, IB, IIB and IVB of the Periodic Table; and thereafter heating the porous glass in a reducing atmosphere. The luminescent glass obtained by the process is excellent in heat resistance, chemical durability, mechanical strength and other properties, and exhibits strong luminescence when irradiated with UV light or the like. The glass can be effectively used as a luminous body for lighting systems, display devices, etc.

Abstract: The present invention provides a process for producing a luminescent glass, comprising the steps of adsorbing, to a porous high silica glass, at least one metal component selected from the group consisting of elements of Groups IIIA, IVA, VA, VIA, VIIA, VIII, IB, IIB and IVB of the Periodic Table; and thereafter heating the porous glass in a reducing atmosphere. The luminescent glass obtained by the process is excellent in heat resistance, chemical durability, mechanical strength and other properties, and exhibits strong luminescence when irradiated with UV light or the like. The glass can be effectively used as a luminous body for lighting systems, display devices, etc.

Abstract: A transparent white fluorescent glass is provided which contains a soda lime glass as a base material, 0.8 to 2.5 wt % of Sn, calculated as SnO, and 0.045 wt % or less of Fe, calculated as Fe2O3, and a transparent white fluorescent glass which contains the soda lime glass as a base material, 0.8 to 2.5 wt % of Sn, calculated as SnO, and 0.02 to 0.14 wt % of Ce, calculated as CeO2. This fluorescent glass can be suitably used for producing at low cost a large plate material having a size that is several tens of centimeters or more that is easy and simple to operate and exhibits satisfactory white fluorescence by ultraviolet ray irradiation.

Abstract: A glass composition for lamps includes the following by weight percent: SiO2: 60-75 wt %; CeO2+Ce2O3: 0.01-5.2 wt %; SnO+SnO2: 0.01-5.2 wt %; Al2O3: 0.5-6 wt %; B2O3: 0-5 wt %; Li2O+Na2O+K2O: 13-20 wt %; MgO: 0.5-5 wt %; CaO: 1-10 wt %; SrO: 0-10 wt %; BaO: 0-10 wt %; ZnO: 0-10 wt %; Fe2O3+FeO: 0-0.2 wt %; and TiO2: 0-1 wt %. The glass composition for lamps that contains no lead or antimony achieves high ultraviolet screening capacity, ensuring fewer occurrences of initial coloring and ultraviolet ray caused coloring of glass.

Abstract: The present invention provides a process for producing a luminescent glass, comprising the steps of adsorbing, to a porous high silica glass, at least one metal component selected from the group consisting of elements of Groups IIIA, IVA, VA, VIA, VIIA, VIII, IB, IIB and IVB of the Periodic Table; and thereafter heating the porous glass in a reducing atmosphere. The luminescent glass obtained by the process is excellent in heat resistance, chemical durability, mechanical strength and other properties, and exhibits strong luminescence when irradiated with UV light or the like. The glass can be effectively used as a luminous body for lighting systems, display devices, etc.

Abstract: A transparent white fluorescent glass is provided which contains a soda lime glass as a base material, 0.8 to 2.5 wt % of Sn, calculated as SnO, and 0.045 wt % or less of Fe, calculated as Fe2O3, and a transparent white fluorescent glass which contains the soda lime glass as a base material, 0.8 to 2.5 wt % of Sn, calculated as SnO, and 0.02 to 0.14 wt % of Ce, calculated as CeO2. This fluorescent glass can be suitably used for producing at low cost a large plate material having a size that is several tens of centimeters or more that is easy and simple to operate and exhibits satisfactory white fluorescence by ultraviolet ray irradiation.

Abstract: The present invention provides: a method for producing high silicate glass which has a low Fe concentration and can achieve a high UV transmittance while retaining advantages of Vycor glass that mass-production at low cost is feasible and that complex formation with various photofunctional ions can be effected; and high silicate glass of a high UV transmittance. For obtaining the above high silicate glass, the method is characterized by comprising the steps of: heating borosilicate glass including a heavy metal or rare-earth element (preferably a high-valence heavy metal or rare-earth element) so as to phase-separate the borosilicate glass; subjecting the phase-separated borosilicate glass to acid treatment so as to elute a metal; and sintering the acid-treated borosilicate glass.

Abstract: The present invention provides a method of treating waste glass comprising bringing waste glass into contact with hot steam or hot water under pressure. Using this method, a porous material with a high silicon oxide content that can be reused as a resource for general purposes can be obtained, without the addition of auxiliary raw materials, through a procedure which can be carried out at low cost.

Abstract: The present invention provides a process for producing a luminescent glass, comprising the steps of adsorbing, to a porous high silica glass, at least one metal component selected from the group consisting of elements of Groups IIIA, IVA, VA, VIA, VIIA, VIII, IB, IIB and IVB of the Periodic Table; and thereafter heating the porous glass in a reducing atmosphere. The luminescent glass obtained by the process is excellent in heat resistance, chemical durability, mechanical strength and other properties, and exhibits strong luminescence when irradiated with UV light or the like. The glass can be effectively used as a luminous body for lighting systems, display devices, etc.

Abstract: The invention relates to a method for putting color to glass. This method includes the steps of (a) introducing a laser beam into an interferometer such that the laser beam is split into at least first and second laser beams in the interferometer and that the at least first and second laser beams come out of the interferometer; and (b) irradiating a glass with the at least first and second laser beams to write a plurality of lines simultaneously on a surface of the glass and/or in an inside of the glass.

Abstract: The invention relates to a method for putting color to glass by irradiating a silicate glass, containing a non-bridging oxygen in its structure, with a laser light, thereby forming a non-bridging oxygen hole center therein to put a color to the glass. The invention further relates to a method for putting color to glass by irradiating a silver-ion-containing glass with a high-energy light, thereby forming silver particles in the glass through aggregation of silver ions to put a color to the glass. The invention further relates to a method for erasing color from colored glass by irradiating a colored portion of a glass with a laser light to selectively heat the colored portion by using a laser irradiation apparatus comprising (a) a laser oscillator, (b) a light modulator, (c) a condenser lens mounted on a linear translator, (d) an objective lens, and (e) a galvanometer mirror.

Abstract: Waste glass is pulverized into pulverized waste glass, and the pulverized waste glass is brought into contact with acid solution so that components such as sodium other than silicon oxide in the fine particle waste glass are dissolved in the acid solution and removed. With this, it is possible to remove components other than silicon dioxide from waste glass. Therefore it is possible to recycle waste glass so as to reuse the waste glass as a useful regenerated product that can be used for various purposes.

Abstract: The invention relates to a method for putting color to glass. This method includes the steps of (a) introducing a laser beam into an interferometer such that the laser beam is split into at least first and second laser beams in the interferometer and that the at least first and second laser beams come out of the interferometer; and (b) irradiating a glass with the at least first and second laser beams to write a plurality of lines simultaneously on a surface of the glass and/or in an inside of the glass.