FINING AGENTS FOR SILICATE GLASSES

• Main Authors: DEJNEKA MATTHEW JOHN, GOMEZ SINUE
• Format: Patent
• Language: English; Japanese
• Published: 27.06.2019
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES; METALLURGY; MINERAL OR SLAG WOOL; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS

To provide a fining agent for reducing the concentration of seeds in a silicate glass.SOLUTION: The fining agent includes at least one inorganic compound, such as a hydrate or a hydroxide that acts as a source of water. In one embodiment, the fining agent further includes at least one multivalent metal oxide and, optionally, an oxidizer. A fusion formable and ion exchangeable silicate glass having a seed concentration of less than about 1 seed/cmis also provided. Methods of reducing the seed concentration of a silicate glass, and methods of making a silicate glass having a seed concentration of less than about 1 seed/cmare also described.SELECTED DRAWING: Figure 1 【課題】ケイ酸塩ガラス中のシードの濃度を低減するための清澄剤を提供する。【解決手段】本清澄剤は、水源として作用する、水和物または水酸化物など、少なくとも１種類の無機化合物を含む。１つの実施の形態では、清澄剤は、さらに、少なくとも１種類の多価金属酸化物、および、随意的に酸化剤を含む。約１シード／ｃｍ3未満のシード濃度を有する、溶融形成かつイオン交換可能なケイ酸塩ガラスも提供する。ケイ酸塩ガラスのシード濃度を低減する方法、および約１シード／ｃｍ3未満のシード濃度を有するケイ酸塩ガラスを製造する方法についても記載する。【選択図】図１