COVER GLASS

To create a cover glass having high scratch resistance.SOLUTION: A cover glass has a glass composition comprising, in mol%, SiO2 20-80%, Al2O3 15-30%, B2O3 0-3.7%, Li2O 1-20%, Na2O 2.8-20%, K2O 0-20%, MgO 0.1-50%, and CaO 0-20%, with an X value of 7400 or more as calculated by the following formula....

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Hauptverfasser:	ICHIMARU TOMONORI, HOSODA YOHEI, YUKI TAKESHI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY GLASS JOINING GLASS TO GLASS OR OTHER MATERIALS METALLURGY MINERAL OR SLAG WOOL SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS
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Beschreibung
Zusammenfassung:	To create a cover glass having high scratch resistance.SOLUTION: A cover glass has a glass composition comprising, in mol%, SiO2 20-80%, Al2O3 15-30%, B2O3 0-3.7%, Li2O 1-20%, Na2O 2.8-20%, K2O 0-20%, MgO 0.1-50%, and CaO 0-20%, with an X value of 7400 or more as calculated by the following formula. X=61.1×[SiO2]+174.3×[Al2O3]+11.3×[B2O3]+124.7×[Li2O]-5.2×[Na2O]+226.7×[K2O]+139.4×[MgO]+117.5×[CaO]+89.6×[BaO]+191.8×[TiO2]+226.7×[Y2O3]+157.9×[ZrO2]-42.2×[P2O5].SELECTED DRAWING: Figure 1 【課題】耐傷性が高いカバーガラスを創案する。【解決手段】本発明のカバーガラスは、ガラス組成として、モル％表示で、ＳｉＯ２２０～８０％、Ａｌ２Ｏ３１５～３０％、Ｂ２Ｏ３０～３．７％、Ｌｉ２Ｏ１～２０％、Ｎａ２Ｏ２．８～２０％、Ｋ２Ｏ０～２０％、ＭｇＯ０．１～５０％、ＣａＯ０～２０％を含有し、下記式で算出されるＸ値が７４００以上であることを特徴とする。Ｘ＝６１．１×［ＳｉＯ２］＋１７４．３×［Ａｌ２Ｏ３］＋１１．３×［Ｂ２Ｏ３］＋１２４．７×［Ｌｉ２Ｏ］－５．２×［Ｎａ２Ｏ］＋２２６．７×［Ｋ２Ｏ］＋１３９．４×［ＭｇＯ］＋１１７．５×［ＣａＯ］＋８９．６×［ＢａＯ］＋１９１．８×［ＴｉＯ２］＋２２６．７×［Ｙ２Ｏ３］＋１５７．９×［ＺｒＯ２］－４２．２×［Ｐ２Ｏ５］【選択図】図１