The 8–14 µm emission spectra of 12 T Tauri stars in the Taurus/Auriga dark clouds and in the TW Hydrae association obtained with the Infrared Spectro-graph (IRS 1) on board Spitzer are analyzed. Assuming the 10 µm features originate from silicate grains in the optically thin surface layers of T Tauri disks, the 8–14 µm dust emissivity for each object is derived from its Spitzer spectrum. The em...

The combination of high strength and toughness, excellent wear resistance and moderate density makes zirconia-toughened alumina (ZTA) a favorable ceramic, and the foam version of it may also exhibit excellent properties. Here, ZTA foams were prepared by the polymer sponge replication method. We developed an immersion infiltration approach with simple equipment and operations to fill the hollow ...

It is the key to concrete repair and strengthening construction that base has a certain quality strength. Based on mechanism of sodium silicate, silicate was modified develop kind compound liquid. Through contrast test results impregnation. The strength C5 before after increased by 42.5%, while C10 21.4%, C15 10%.

Glasses in the system 24.5Na2O.24.5CaO.6P2O5.xSrO.(45-x)SiO2 have been studied composition region of x = 0–15 mol%. The as-prepared glasses are transparent and an amorphous network structure. On other hand, heat-treated transformed to opaque white glass-ceramic characterized by their highly crystalline Crystalline apatite (calcium phosphate, Ca3(PO4)2), wollastonite silicate, CaSiO3), strontium...

The rapid permeation and degradation of silazane-based coatings by water vapor limit their application in combustion environments. Hence, this work reports on the reaction oligosilazane Durazane 1800 with an appropriate Yb-complex a molecular approach its as protective thin (1.2 µm) for AISI 304 comparison benchmark 2250 combustion-like Fourier transform infrared- nuclear magnetic resonance-spe...

The high aspect ratio of layered silicate nanoparticles is very convenient to modify the properties of the polymer, but the hydrophilic nature of silicate surfaces impedes their homogeneous dispersion in the organic polymer phase. The hydrophilic clay minerals are commonly treated with ammonium cations with long alkyl chains to improve the compatibility between the silicate layers and the polym...

Antonio Tilocca,1,* Nora H. de Leeuw,1,2 and Alastair N. Cormack1,3 1Department of Chemistry, University College London, London WC1H 0AJ, United Kingdom 2School of Crystallography, Birkbeck College, London WC1E 7HX, United Kingdom 3New York State College of Ceramics, Alfred University, Alfred, New York 14802, USA Received 24 October 2005; revised manuscript received 20 January 2006; published 3...

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Titanium and its alloy are known as important load-bearing biomaterials. The major drawbacks of these metals are fibrous formation and low corrosion rate after implantation. The surface modification of biomedical implants through various methods such as plasma spray improves their osseointegration and clinical lifetime. Different materials have been already used as coatings on biomedical implan...