搜索结果: 1-15 共查到“矿床学与矿相学 Silica”相关记录23条 . 查询时间(0.193 秒)
MINERALOGY AND ORIGIN OF CLAY MINERALS, SILICA AND AUTHIGENIC SILICATES IN LEG 14 SEDIMENTS
CLAY MINERALS AUTHIGENIC SILICATES MINERALOGY
2011/11/11
Preliminary X-ray, SEM, TEM, and optical mineralogical results are reported to discuss the paragenesis, age distribution,and origin of clay minerals, silica modifications and authigenic silicates foun...
Synthesis and Characterization of Silylated Kaolinite/Silica Core–Shell Nanoparticles
Core-Shell Kaolinite Modification Silane Silica
2011/11/14
Studies were conducted on the production of silane modified kaolinite/silica core-shell nanoparticles (SMKS). The SMKS nanoparticles were prepared via the sol–gel technique using tetraethyl oxysilane ...
Microcalorimetric investigation of water vapor adsorption on silica gel
Microcalorimetry Diffusivity Silica gel–water pair Heat of adsorption
2011/11/10
Water vapor adsorption on silica gel was investigated using Tian–Calvet-type microcalorimetry. Differential heat of adsorption data was obtained. The setup of microcalorimetry was used volumetric syst...
Preparation and properties of mesoporous silica/bismaleimide/diallylbisphenol composites with improved thermal stability, mechanical and dielectric properties
thermosetting resins bismaleimide meosoporous silica dielectric properties structure-property
2011/12/14
New composites with improved thermal stability, mechanical and dielectric properties were developed, which consist of 2,2!-diallylbisphenol A (DBA)/4,4!-bismaleimidodiphenylmethane (BDM) resin and a n...
Structural environment of krypton dissolved in vitreous silica
Structural environment krypton dissolved vitreous silica X-ray
2012/4/1
X-ray absorption measurements on Kr dissolved homogeneously in vitreous silica (1.97 wt% Kr)
have been carried out at the Kr K-edge at 4.5 K, representing the first direct determination of the sites
...
The effects of silica and water on the viscosity of hydrous quartzofeldspathic melts
hydrou smelts water
2012/3/30
Theviscositiesofhydrousmelts(0.65to2.8wt%H O)withquartzofeldspathiccom-2
Qz ,andAb Qz (moleproportionscalculatedonthe
positionscorrespondingtoAb,Ab
74 26 48 52
basisofeightoxygenatoms;Ab NaAlSi O ...
A moganite-type phase in the silica analog phosphorus oxynitride
phosphorus oxynitride silica system moganite
2012/3/30
A new polymorph of phosphorus oxynitride (PON) a silica analog has been recovered at ambient
pressure by quenching after a treatment at 850 ?C under a pressure of 2.5 GPa using cristobalite- or
quar...
A new high-pressure silica phase obtained by molecular dynamics - Reply
high-pressure silica phase obtained molecular dynamics - Reply
2012/4/6
Kanzaki et al. (1997) argue that SBAD structure cannot beand baddeleyiteonsidered to be intermediate between ?-PbO2 at highstructures. The similarity between SBAD and ?-PbO2pressure was emphasized by ...
A new high-pressure silica phase obtained by molecular dynamics - Discussion
high-pressure silica phase obtained molecular dynamics - Discussion
2012/4/6
Belonoshko et al. (1996) argued that they found a new high-pressure silica phase (which they denoted SBAD) with spacegroup Pnc2 from molecular dynamics (MD) simulations. How-ever, we noticed that a si...
Effects of Acidity on the Hydrothermal Synthesis of Kaolinite from Silica-Gel and Gibbsite
Crystallite size Crystallization Hydrothermal synthesis Kaolinite pH Stacking fault
2011/12/27
Abstract: A comparative study is reported in which kaolinite has been hydrothermally synthesized at several pH conditions. The syntheses were carried out at 220 亱C for 3 to 10 d with distilled water o...
A new high-pressure silica phase obtained by molecular dynamics
high-pressure silica phase obtained molecular dynamics
2012/4/5
Amolecular dynamics study withanalytical and ab initio interatomic potentials revealed the possibility of a new silica phase withPnc2 structure, which is more stable than sti-shovite and its CaCl2-lik...
Four-membered rings in silica and aluminosilicate glasses
Four-membered rings silica aluminosilicate glasses
2012/4/5
Assignmentofthe peaksnear485em-I in vibrational spectra ofSi02-M7;:;Al02(where M=an alkali oralkaline earth element) glassesto v,(T-O-T) modesin four-membered
rings wastested withmolecularorbital cal...
Oxygen Isotopic Constraints on the Origin of Nodular Silica-Apatite from the Har Peres Pyroclastics, Golan Heights, Israel
Apatite Har Peres pyroclastics Oxygen isotope
2011/12/29
Oxygen isotope composition of three types of unique nodules which consist of amorphous silica-apatite, cristobalite-apatite and tridymite-apatite associations interspersed amidst basaltic pyroclastics...
Effects of the Structure of Silica-Alumina Gel on the Hydrothermal Synthesis of Kaolinite
Gel structure Hydrothermal synthesis Kaolinite Nuclear magnetic resonance Silica-alumina gel
2011/12/29
Kaolinite was hydrothermally synthesized from two kinds of silica-alumina gels to examine the effect of the structure of the starting material. Two kinds of gels were prepared by precipitation at diff...
Apparent and Partial Specific Sorption of Oxine by Montmorillonite and Silica Gel in Binary Mixtures
Adsorption Mixtures Montmorillonite Oxine Silica gel Specific sorption
2012/1/12
Oxine sorption by binary mixtures of montmorillonite and silica gel was studied at pH 5 as a function of oxine concentration and mixture composition. The investigation was made to resolve the problem ...