Brydson, "Bonding in alpha-quartz (SiO2): A view of the unoccupied states", American Mineralogist, Vol. 85, 732-738, 2000Garvie, L.A.J., Rez, P., Alvarez, J.R., Buseck, P.R., Craven, A.J., and Brydson, R. (2000) Bonding in alpha-quartz (SiO2): A view of the ...
The constant-volume specific heat, the entropy, the phonon contributions to internal energy and Helmholtz free energy, and the atomic temperature factors of α-quartz and stishovite, two allotropic forms of SiO 2 , are calculated as a function of temperature from ab initio phonon band structures...
First-principles simulations were conducted to explore various electronic properties of crystalline SiO2(α-quartz) under ultrafast laser irradiation. Employing Density Functional Perturbation Theory and the many-body (GW) approximation, we calculated the impact of thermally excited electrons on the electroni...
An (oxygen)- vacancy model of the E1≈ center in alpha quartz, featuring an asymmetric relaxation of the two silicons adjacent to the oxygen vacancy, is presented and analyzed. This model is shown to be consistent with both theoretical calculations and experimental hyperfine data, in contrast wi...
In the system SiO 2 /NbCl 5 with P(NbCl 5 , initial, 298 K) ≤ 2.0 atm the back reaction of SiCl 4 and NbOCl 3 leading to vapour deposition of SiO 2 is inhibited on a quartz glass surface. At solid niobium oxide (system SiO 2 /NbO x /NbCl 5 ) the inhibition of the vapour...
Pt 99.95%, 15nm SiO2 quartz 1, 3, 5, 10, 45, 75, 150um TiO2/W 10-30nm Nanopowder Rhodium Nanopowder 15nm Pd 99.95%, 15nm SiO2 30nm, 50nm, 100nm, 0.4um; 1um TiO2/Ta 10-30nm Nanopowder Ruthenium Nanopowder 15nm Rh 99.95%, 15nm SiO2 spherical 0.2, 0.8, 5, 10, 20, 25...
The intrinsic point defects in a-SiO2 have recently received considerable attention. Careful use of paramagnetic resonance, coupled with annealing and optical studies, has led to unambiguous identification of three fundamental defects. These are the E′
Pt 99.95%, 15nm SiO2 quartz 1, 3, 5, 10, 45, 75, 150um TiO2/W 10-30nm Nanopowder Rhodium Nanopowder 15nm Pd 99.95%, 15nm SiO2 30nm, 50nm, 100nm, 0.4um; 1um TiO2/Ta 10-30nm Nanopowder Ruthenium Nanopowder 15nm Rh 99.95%, 15nm SiO2 spherical 0.2, 0.8, 5, 10, 20, 25...
(SHOP), SABIC/Linde alpha-SABLIN, DuPont’s Versipol™, IFP AlphaSelect™, and UOP Linear-1™processes1,4,5. Chevron Philips (Gulf) and others utilize similar catalysts under similar reaction conditions6. Such homogeneous catalysts also often require aluminum–alkyl co-catalysts to form ...
5972488Opaque quartz glass and process for production thereof1999-10-26Nagata et al.428/304.4 5849055Process for producing inorganic microspheres1998-12-15Arai et al.65/17.3 5389582Cristobalite reinforcement of quartz glass1995-02-14Loxley et al.501/4 ...