A new empirical pairwise potential model for ionic and semi-ionic oxides has been developed. Its transferability and reliability have been demonstrated by testing the potentials toward the prediction of structural and mechanical properties of a wide range of silicates of technological and geological importance. The partial ionic charge model with a Morse function is used, and it allows the mode...

This study assesses the quantitative effects of incorporating high-volume fly ash (HVFA) into tricalcium silicate (C₃S) paste on the hydration, degree of silicate polymerization, and Al substitution for Si in calcium silicate hydrate (C-S-H). Thermogravimetric analysis and isothermal conduction calorimetry showed that, although the induction period of C₃S hydration was significantly extended, t...

Glass with embedded metal and sulfides (GEMS) is a major component of chondritic porous interplanetary dust particles. Although GEMS one the most primitive components in Solar System, its formation process conditions have not been constrained. We performed condensation experiments gases system Mg-Si-O (MgSiO3 composition) S-free CI composition (Si-Mg-Fe-Na-Al-Ca-Ni-O system) induction thermal p...

This paper discusses the effects of pore arrangements on the dielectric property of porous low-k and high-k dielectrics. Higher performance large scale integration (LSI) requires lower dielectric constant to decrease line-to-line capacitance. Recently, porous low-k dielectrics are introduced for low-k dielectrics because of its ultra lower dielectric constant. However, their poor mechanical str...

Context. In the generally accepted, but poorly documented model, silicate J-type C-stars are binary objects for which the silicate emission originates from a circumbinary or a circumcompanion disc. Aims. We aim at testing this hypothesis by a thorough spectral and spatial observational study of one object: IRAS 18006-3213. Methods. We obtained, analysed and modeled high spatial resolution inter...

A sample of 196 AGNs and ULIRGs observed by the Infrared Spectrograph (IRS) on Spitzer is analyzed to study the distribution of the strength of the 9.7μm silicate feature. Average spectra are derived for quasars, Seyfert 1 and Seyfert 2 AGNs, and ULIRGs. We find that quasars are characterized by silicate features in emission and Seyfert 1s equally by emission or weak absorption. Seyfert 2s are ...

We present high signal to noise ratio Spitzer Infrared Spectrograph observations of 17 Virgo early-type galaxies. The galaxies were selected from those that define the colour-magnitude relation of the cluster, with the aim of detecting the silicate emission of their dusty, masslosing evolved stars. To flux calibrate these extended sources we have devised a new procedure that allows us to obtain...

A simple method for modifying a polymer surface to induce lipid bilayer formation by vesicle fusion is described. A silicate gel was prepared by condensation of tetraethyl orthosilicate (TEOS) in the presence of acid. When applied to a poly(methylmethacrylate) substrate, either a rough or a smooth layer could be produced, depending on the method used for the application. The smooth surface indu...

in this study, rice husk and sodium silicate solution were used to produce particleboards. sodium silicate was used as bonding aid by 25, 20, 15, 10, 5 and zero percent (based on rice husk dry weight). to modify the mechanism of bondability, one percent of 4,4’-diphenylmethane diisocyanate (mdi) was added for every five percent less sodium silicate solution. the effect of diisocyanate on bondab...