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Ōsaka, Japan

Suetsugu T.,Kyoto Institute of Technology | Suetsugu T.,Isuzu Glass Co. | Wakasugi T.,Kyoto Institute of Technology | Kadono K.,Kyoto Institute of Technology
Journal of Materials Research

To fabricate graded-index optical elements by silver staining, we investigated the behavior of ion incorporation in alummoborosilicate glasses, in which the contents of Al 2O 3 and Na 2O were the same (in mol%). The amount of silver incorporated into the aluminoborosilicate glasses by the staining at 320 °C for 12 h was 5 to 10 times larger than that incorporated into the soda-lime silicate and borosilicate glasses. The diffusion depth of the incorporated silver ions was approximately 80 μm, which was also much deeper than that of the soda-lime silicate and borosilicate glasses. The coloration of the glasses was suppressed, particularly for the glass with the low content of Na20. The concentration of the incorporated silver ions at the glass surface was 2 × 10 21 atom/cm 3 for the 37.5SiO 2·25Al 2O 3·25Na 2O·12.5B 2O 3 glass, corresponding to the replacement of sodium ions (20%). The refractive indices near the stained surfaces increased by 0.04 to 0.06. These values were comparable with those of the soda-lime silicate and borosilicate glasses. © 2010 Materials Research Society. Source

Hattori Y.,Kyoto Institute of Technology | Shiomi H.,Kyoto Institute of Technology | Wakasugi T.,Kyoto Institute of Technology | Suetsugu T.,Kyoto Institute of Technology | And 2 more authors.
Chemistry Letters

Staining, which has been used for coloring of glass, was extended as a method for ion exchange in which monovalent ions in the localized fine domains at the surface of glass are replaced by other ions contained in the stain. Here, mixed aqueous LiNO 3-poly(ethylene glycol) solution was deposited as dots approximately 100μm in diameter on a 70SiO 2·15B 2O 3·15Na 2O (mol%) glass by ink-jet printing. Then the glass was heat-treated at 400°C resulting in the exchange of Li + for Na + ions at the dotlike domains. This ion exchange induced phase separation at the dots. Subsequent heat treatment at 600°C and acid leaching made the dot domains porous. Consequently, we succeeded to prepare a glass, at the surface of which dot-like domains were porous and a number of the dots are periodically arrayed. © 2012 The Chemical Society of Japan. Source

[Object] The object is to provide a negative electrode material for a lithium secondary battery, wherein a sulfide-based negative electrode with water-resistant properties can exert excellent cycle characteristics and high output performance while maintaining a high discharge capacity and there is no precipitation of lithium dendrites during charge at low temperature. [Means for Solving Problems] A negative electrode material for a lithium secondary battery comprising sulfur and sulfide glass including the following components (i) and (ii): (i) at least one or more elements selected from a group consisting of Sb, As, Bi, Ge, Si, Cu, Zn, Pd, In and Zr; and

Japan National Institute of Advanced Industrial Science, Technology and Isuzu Glass Ltd. | Date: 2014-02-26

Problem: To provide a lithium secondary battery negative electrode active material consisting of a SnSb based sulfide that delivers a high electrode capacity density, excellent output characteristics, and excellent cycle life characteristics and also provide a method for manufacturing the lithium secondary battery negative electrode active material, said method being capable of easily manufacturing the high performance lithium secondary battery negative electrode active material at low cost without requiring a high-temperature processing step and special facilities as required in a glass melting method. Solution: A method for manufacturing a lithium secondary battery negative electrode active material containing a SnSb based sulfide comprises a step of obtaining a SnSb based sulfide precipitate by adding an alkali metal sulfide to a mixed solution of a tin halide and an antimony halide.

Yamada I.,University of Shiga Prefecture | Yamashita N.,Isuzu Glass Co. | Tani K.,Isuzu Glass Co. | Einishi T.,Isuzu Glass Co. | And 3 more authors.
Japanese Journal of Applied Physics

We fabricated infrared wire-grid polarizers consisting of a 500-nm pitch Al grating on a low toxic chalcogenide glass (Sb-Ge-Sn-S system) using the direct imprinting of subwavelength grating followed by a deposition of Al metal by thermal evaporation. To fabricate the subwavelength grating on a chalcogenide glass more easily, the sharp grating was formed on the mold surface. The fabricated polarizer with Al thickness of 130nm exhibited a polarization function with a transverse magnetic transmittance greater than 60% in the 5-9 μm wavelength range, and an extinction ratio greater than 20 dB in 3.5-11 μm wavelength range. The extinction ratio of the element with Al wires of 180-nm thickness reached 27dB at 5.4-μm wavelength. The polarizer can be fabricated at lower costs and simpler fabrication processes compared to conventional infrared polarizers. © 2012 The Japan Society of Applied Physics. Source

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