without real or apparent crystalline form.
function of prevention of formation lumps or caking in powders.
function of prevention of settling of pigments or fillers in liquid systems.
bulk density is a measure of weight of fumed silica per unit volume (g/L).
function of carrying other active ingredients.
description of fumed silica with density that is approximately 2 times the standard density.
description of material properties usually associated with its performanceas an insulator.
a system of printing on a rotary press employing water-based ink, used especially for printing on plastic, paper, or cardboard.
is thought as a onedimentional characteristic of the material, whereby powders can be ranked on sliding scale from free-flowing to nonflowing.
special amorphous form of silica produced by method of vapor phase hydrolysis that results in pure, x-ray amorphous, silicon dioxide.
chemical process in which a molecule is cleaved into two parts by the addition of a molecule of water.
a hydrophilic fumed silica is one that exhibits an affinity to water.
a hydrophobic fumed silica is one that does not exhibit affinity to water.
shape and structure of particles and aggregate of particles.
produced under conditions involving intense heat.
characteristics of the materials during deformation and flow.
the physical property of being stiff and bending resistant.
larger agglomerate formations of fumed silica given as % of total weight.
a white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite as well as in amorphous form.
(SiCl4) is a colourless volatile liquid. It's most commonly prepared by reacting chlorine with hot silicon: Si + 2 Cl2 →SiCl4
total specific area of aggregate and agglomerate surfaces of fumed silica structure (measured by BET method).
state of a substance when its particles are mixed but not dissolved in a fluid or solid.
reversible behaviour in a system that exhibits decrease in viscosity when shear force is applied. System regains viscosity in time-dependent way as shear force application stops.
description of fumed silica with standard density.
resistance of a liquid to sheer forces and hence to flow.