The Experts below are selected from a list of 240 Experts worldwide ranked by ideXlab platform

Yu. A. Kumzerov - One of the best experts on this subject based on the ideXlab platform.

  • Freezing and melting of gallium in Porous Glass
    Solid State Communications, 1997
    Co-Authors: Cheng Tien, E. V. Charnaya, C. S. Wur, K.j. Lin, Yu. A. Kumzerov
    Abstract:

    Abstract We report an investigation of the melting and the freezing of conducting materials confined in Porous Glass by electrical resistance measurements. For gallium in Porous Glass, heat-capacity measurements show a broadened latent-heat peak associated with the melting at about 230 K much lower than the bulk melting point 302.9 K. The resistance exhibits a clear freezing-melting hysteresis. For gallium in Porous Glass, in contrast to the freezing and the melting transitions the superconducting transition is extremely sharp and does not show any hysteresis during the cooling and warming process.

  • Superconductivity of gallium in Porous Glass
    Physica C-superconductivity and Its Applications, 1996
    Co-Authors: E. V. Charnaya, Cheng Tien, C. S. Wur, Yu. A. Kumzerov
    Abstract:

    Abstract Superconductivity of gallium embedded in the Porous Glass with average pore size of 4 nm was studied using a SQUID magnetometer. Hysteretic behavior at both high and low magnetic fields was observed. The quantitative model of the superconducting properties of the Porous Glass with gallium has been developed on the bases of the measurements performed. The phase diagram in the H − T plane, including the irreversibility line, was obtained.

  • Freezing and melting of mercury in Porous Glass.
    Physical review. B Condensed matter, 1995
    Co-Authors: Yu. A. Kumzerov, A. A. Nabereznov, Sergey Vakhrushev, B. N. Savenko
    Abstract:

    The results of neutron diffraction and calorimetric measurements of the freezing-melting phase transition of metallic mercury in Porous Glass are reported. Broadening of both transitions and extremely large temperature hysteresis between them are observed. The width of diffraction peaks is found to be temperature independent.

Antoni P Tomsia - One of the best experts on this subject based on the ideXlab platform.

  • bioinspired strong and highly Porous Glass scaffolds
    Advanced Functional Materials, 2011
    Co-Authors: Qiang Fu, Eduardo Saiz, Antoni P Tomsia
    Abstract:

    Abstract The quest for more efficient energy-related technologies is driving the development of Porous and high-performance structural materials with exceptional mechanical strength. Natural materials achieve their strength through complex hierarchical designs and anisotropic structures that are extremely difficult to replicate synthetically. We emulate nature's design by direct-ink-write assembling of Glass scaffolds with a periodic pattern, and controlled sintering of the filaments into anisotropic constructs similar to biological materials. The final product is a Porous Glass scaffold with a compressive strength (136 MPa) comparable to that of cortical bone and a porosity (60%) comparable to that of trabecular bone. The strength of this Porous Glass scaffold is ~100 times that of polymer scaffolds and 4-5 times that of ceramic and Glass scaffolds with comparable porosities reported elsewhere. The ability to create both Porous and strong structures opens a new avenue for fabricating scaffolds for a broad array of applications, including tissue engineering, filtration, lightweight composites, and catalyst support.

Liu Wei-xue - One of the best experts on this subject based on the ideXlab platform.

  • Investigation on Removing Ethylene by Photocatalyst of TiO_2 Thin Films Coated on Porous Glass Pipes
    Bulletin of the Chinese ceramic society, 2006
    Co-Authors: Liu Wei-xue
    Abstract:

    Porous Glass pipes coated with TiO_2 thin films were prepared by phase-separation, acid treatment and Sol-gel method, in this investigation. The reactive bed which is composed of Porous Glass pipes coated with TiO_2 was used to remove ethylene gas. The effect of removing ethylene was characterized by GC. The surface morphology, crystallization and thermal property of Porous Glass pipes coated with TiO_2 thin films were investigates by means of SEM, XRD, and DSC-TGA. The results show that the ethylene was removed well by means of Porous Glass pipes coated with TiO_2 thin film prepared under the conditions of phase-separation (720℃/2h) and acid treatment(2mol /L/72h).

Abdul-ghani Olabi - One of the best experts on this subject based on the ideXlab platform.

  • Production and Treatment of Porous Glass Materials for Advanced Usage
    Reference Module in Materials Science and Materials Engineering, 2016
    Co-Authors: Mohammed Hasanuzzaman, A. Rafferty, M. Sajjia, Abdul-ghani Olabi
    Abstract:

    Porous Glass is derived from Glass that is heat treated to form two interconnecting phases: a silica-rich phase, and an alkali-rich borate phase. The heat-treated Glass is then leached selectively to remove one of the phases. The heat-treatment step and leaching conditions can be adjusted to achieve the desired pore size, pore volume, and surface area. This Glass has an interconnected pore structure with a uniform pore distribution. Therefore, Porous Glass based on the sodium borosilicate system which is widely known to undergo amorphous phase separation can be tailor-made to required specifications, thus offering flexibility in terms of end applications.

Shuichi Kagawa - One of the best experts on this subject based on the ideXlab platform.

  • Gas permeation properties of Porous Glass modified with LB films of alkylalkoxysilane derivatives
    Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2000
    Co-Authors: Isamu Moriguchi, Yukio Shimada, Yasutake Teraoka, Shuichi Kagawa
    Abstract:

    Abstract The surface of Porous Glass with average pore diameter of 40 A could be covered successfully with polymeric, pinhole-free LB films of dialkylalkoxysilane derivative. The gas permeability of Porous Glass decreased with increasing the number of deposited LB layers and was regulated by the phase-transition of the LB film. The air-calcination at 500°C of the Porous Glass, which was modified with 200-layer LB film, resulted in narrowing the pore opening size as a result of the formation of a silica overlayer.