Abstract: A sulfide solid electrolyte to be use in a lithium-ion secondary battery includes an argyrodite crystal structure represented by LiaPSbHac (where 5?a?7, 4?b?6, and 0<c?2, and Ha represents a halogen element), in which in an X-ray diffraction spectrum using a Cu-K? ray, the argyrodite crystal structure has a peak A and a peak B, each having a full width at half maximum of 0.07° or more, within a range of 2?=30.3°±0.5°, and a difference between diffraction angles (2?) of the peak A and the peak B is 0.05° or more.

Abstract: A sulfide solid electrolyte to be used in a lithium-ion secondary battery, including an argyrodite crystal, in which the crystal is represented by a composition formula Lia—M—Zb—Hac; M is at least one element selected from Na, K, and elements each of which exists as any of divalent to pentavalent cations in the crystal; Z is at least one element selected from elements that exists as a divalent anion in the crystal; Z includes S; Ha is at least one element selected from the group consisting of F, Cl, Br, and I; a, b, and c in the composition formula indicate a ratio among contents (unit: at%) of the respective elements and satisfy 5 < a < 7, 4 < b < 6, and 0 < c < 2; and a maximum distance between Li ions in the crystal is 2.54 ? or shorter.

Abstract: A method for producing a high silicate glass substrate, includes: (1) obtaining a glass precursor containing, as represented by mol % based on oxides, 60% to 75% of SiO2, 0% to 15% of Al2O3, 15% to 30% of B2O3, 0% to 3% of P2O5, and 1% to 10% in total of at least one selected from R2O and R?O; (2) applying first heat treatment to the glass precursor to cause phase separation so as to obtain a phase-separated glass; (3) applying acid treatment to the phase-separated glass to make the phase-separated glass porous so as to obtain a porous glass; (4) drying the porous glass so that a rate of change in mass reaches 10% to 50%; and (5) applying second heat treatment to the porous glass to sinter the porous glass so as to obtain a high silicate glass substrate.

Abstract: The present invention relates to a crystallized glass including a crystalline phase consisting of Ba—Si—O, in which the crystallized glass includes Li, and crystallinity of Li-based crystals contained in the crystalline phase is 20% or lower as represented by weight %, a high-frequency substrate including the crystallized glass, and a manufacturing method for a crystallized glass including a crystalline phase consisting of Ba—Si—O, the method including: obtaining an amorphous glass by melt-shaping a material containing BaO and SiO2; and crystallizing the amorphous glass by holding the amorphous glass at a treatment temperature of 600° C. or higher and lower than 1,000° C.

Abstract: The present invention relates to a chemically strengthened glass, in which CT1 and CT5 satisfy CT5/CT1?0.85, the CT1 satisfies CT1>?38.7×ln(t/1000)+48.2 [MPa] and an internal energy density rE satisfies rE?23.3×t/1000+15 [kJ/m2]. CS is a surface compressive stress value [MPa], ? (x) is a compressive stress value [MPa] at a position x in a depth direction, DOL is a compressive stress depth [?m], and t is a sheet thickness [?m].

Abstract: The present invention relates to a chemically strengthened glass, in which CT1 and CT5 satisfy CT5/CT1?0.85, the CT1 satisfies CT1>?38.7×ln(t/1000)+48.2 [MPa] and an internal energy density rE satisfies rE?23.3×t/1000+15 [kJ/m2]. CS is a surface compressive stress value [MPa], ? (x) is a compressive stress value [MPa] at a position x in a depth direction, DOL is a compressive stress depth [?m], and t is a sheet thickness [?m].

Abstract: The present invention relates to a chemically strengthened glass, in which CT1 and CT5 satisfy CT5/CT1?0.85, the CT1 satisfies CT1>?38.7×ln(t/1000)+48.2 [MPa] and an internal energy density rE satisfies rE?23.3×t/1000+15 [kJ/m2]. CS is a surface compressive stress value [MPa], ? (x) is a compressive stress value [MPa] at a position x in a depth direction, DOL is a compressive stress depth [?m], and t is a sheet thickness [?m].

Abstract: A glass for chemical strengthening contains, in terms of mol percentage based on oxides, SiO2: 60 to 67%, Al2O3: 9 to 13.5%, Na2O: 13.5 to 18.5%, K2O: 0.1 to 3%, MgO: 6 to 10.5%, and TiO2: more than 0% and 5% or less. The glass has a main surface and a back surface opposing the main surface. A tin content in the back surface is larger than a tin content in the main surface. A hydrogen concentration in a depth of 1 to 2 ?m in a sheet thickness direction from a surface of the main surface is gradually decreased in a depth direction.

Abstract: The present invention relates to a chemically strengthened glass, in which CT1 and CT5 satisfy CT5/CT1?0.85, the CT1 satisfies CT1>?38.7×ln(t/1000)+48.2 [MPa] and an internal energy density rE satisfies rE?23.3×t/1000+15 [kJ/m2]. CS is a surface compressive stress value [MPa], ? (x) is a compressive stress value [MPa] at a position x in a depth direction, DOL is a compressive stress depth [?m], and t is a sheet thickness [?m].

Abstract: A process for producing a chemically strengthened glass is provided. The method for producing a chemically strengthened glass includes subjecting a phase-separated glass to an ion exchange treatment. A chemically strengthened glass which is obtained by the process and a phase-separated glass which has been subjected to the ion exchange treatment are also provided.

Abstract: A process for producing a chemically strengthened glass is provided. The method for producing a chemically strengthened glass includes subjecting a phase-separated glass to an ion exchange treatment. A chemically strengthened glass which is obtained by the process and a phase-separated glass which has been subjected to the ion exchange treatment are also provided.