Abstract:
A method of leaching alkali ions from a glass substrate to form a glass substrate having an intrinsic alkali barrier layer including providing a glass substrate comprising alkali metal ions, alkaline earth metal ions, or a combination thereof and contacting the surfaces of the substrate with a solution comprising a hydrogen bearing species such that at least a portion of the hydrogen bearing species replaces at least a portion of the alkali metal ions, alkaline earth metal ions, or the combination thereof in the at least one surface to form the glass substrate having the intrinsic alkali barrier layer.
Abstract:
A system is provided for sintering thin, wide, and/or long tape materials such as in a roll to roll process. The system is arranged to control sintering and limit deformation of the tape during sintering to produce sintered material.
Abstract:
The present disclosure is directed to a method for producing constancy of the ion-exchanged product stress profile through adjustment of ion-exchange conditions by taking account of the influence of salt bath poisoning on the baths useful lifetime. The present disclosure is directed to a method of ion-exchange in which the salt bath temperature and salt bath time are adjusted as a function of the amount of alkali metal ions that exchange in the bath. That is, temperature and time are adjusted as a function of salt bath poisoning. Temperature is set to its highest value and time to its shortest value in the starting un-poisoned salt bath, those values chosen to hit target values of surface compressive stress and exchange depth of layer. Temperature is then reduced and time lengthened as salt bath poisoning proceeds, those changes chosen to maintain the same surface compressive stress and exchange depth of layer.
Abstract:
The present disclosure is directed to a doped silica-titania glass, DST glass, consisting essentially of 0.1 wt.% to 5 wt.% halogen, 50 ppm-wt. to 6 wt.% of one or more oxides of Al, Ta and Nb, 3 wt.% to 10 wt.% TiO 2 and the remainder SiO 2 . In an embodiment the halogen content can be in the range of 0.2 wt.% to 3 wt.% along with 50 ppm-wt. to 6 wt.% one or more oxides of Al, Ta and Nb, 3 wt.% to 10 wt.% TiO 2 and the remainder SiO 2 . In an embodiment the DST glass has an OH concentration of less than 100 ppm. In another embodiment the OH concentration is less than 50 ppm. The DST glass has a Active temperature T f of less than 875°C. In an embodiment T f is less than 825°C. In another embodiment T f is less than 775°C.
Abstract:
This disclosure is directed to a silica-titania-niobia glass and to a method for making the glass. The composition of the silica-titania-niobia (SiO 2 -TiO 2 -Nb 2 O 5 ) glass, determined as the oxides, is Nb 2 O 5 in an amount in the range of 0.005 wt.% to 1.2 wt.% TiO 2 , in an amount in the range of 5 wt.% to 10 wt.%, and the remainder of glass is SiO 2 . In the method, the STN glass precursor is consolidated into a glass by heating to a temperature of 1600°C to 1700°C in flowing helium for 6 hours to 10 hours. When this temperature is reached, the helium flow can be replaced by argon for the remainder of the time. Subsequently the glass is cooled to approximately 1050°C, and then from 1050°C to 700°C followed by turning off the furnace and cooling the glass to room temperature at the natural cooling rate of the furnace.
Abstract:
A method of moving alkali metal ions in a glass substrate to form a glass substrate having an intrinsic alkali metal barrier layer or an enhanced alkali metal layer by applying voltage to at least one of the surfaces of the substrate such that at least a portion of the alkali metal ions, alkaline earth metal ions, or the combination thereof in the at least one surface move into the thickness of the glass substrate.