Cabot Corporation

About: Cabot Corporation is a company organization based out in Boston, Massachusetts, United States. It is known for research contribution in the topics: Carbon black & Carbon. The organization has 1279 authors who have published 1399 publications receiving 36736 citations.

Instability of thermocapillary–buoyancy convection in shallow layers. Part 2. Suppression of hydrothermal waves

Abstract: Hydrothermal-wave instabilities in thermocapillary convection are known to produce undesirable effects when they occur during the float-zone crystal-growth process, and perhaps in other situations. Suppression of the hydrothermal-wave instability produced in the model system of Part 1 (Riley & Neitzel 1998) is demonstrated through the sensing of free-surface temperature perturbations and the periodic addition of heat at the free surface along lines parallel to the crests of the hydrothermal waves.

Insulated panel and glazing system comprising the same

Abstract: The invention provides a translucent glazing panel comprising: (a) a thermoplastic panel comprising (i) an outer wall having an inner surface defining an internal channel, the internal channel having an internal volume, and (ii) at least one inner wall protruding from the inner surface into the internal channel, and (b) hydrophobic aerogel particles, the hydrophobic aerogel particles being disposed within the channel. The invention also provides an insulated glazing system comprising: (a) a first U-shaped element, (b) a second U-shaped element, the first and second elements being disposed to define a cavity therebetween, and (c) an insulating panel disposed within the cavity. The insulated glazing system can further comprise hydrophobic aerogel particles disposed within the internal channel of the insulating panel. The insulating panel of the glazing system also can be the same as the translucent glazing panel described herein.

The effect of the residence time distribution on the performance and efficiency of combustors

Abstract: The fraction of unburned fuel as a function of residence time in a combustor was computed for two extreme cases: the perfectly-stirred and the plug-flow type combustors. It is shown that an “ideal” residence time distribution can be obtained by the combination of the two types of combustors in such a way that the perfectly stirred part is followed by the plug flow combustor in series. This combination of the two combustor types enables the highest volumetric rates of combustion to be obtained for a given combustion efficiency. Experiments were carried out both with a 1/10 scale water model of the IJmuiden furnace and also in the IJmuiden tunnel furnace. A salt solution was introduced as a tracer into the “burner fluid” of the water model and the residence time distribution was determined by measuring the decay of the salt concentration with time in the exit stream after cutting off the tracer flow. The form of the residence time distribution curves indicated that the combustor volume consisted of two parts, a well stirred and a plug flow type volume fraction in series. By introducing the “burner fluid” in the form of a swirling jet and by varying the degree of swirl it was possible to vary the ratio of the mean residence time in the perfectly stirred section to that in the whole combustor ( s / ) over a wide range. Residence time distributions were also determined in the IJmuiden furnace while burning pulverized anthracite. The tracer in this case was argon and the technique was the same essentially as in the water model experiments. The comparison of the residence time distributions in the cold model and in the furnace showed good agreement when the value of the dimensionless group G φ /G x ·ϑ was maintained the same for both model and prototype. ( G φ is the axial flux of the angular momentum of the swirling burner fluid, G x the axial flux of the linear momentum, and ϑ the burner radius.) Good agreement was found also between the experimental values of the unburned fraction of the fuel at the boundary of the two types of zones and those predicted from theory.

Easily dispersible carbon blacks

Abstract: Carbon blacks treated with a treating agent comprising at least one compound containing at least one long chain alkenyl or alkyl group and at least one amine group. Optionally, the compound contains at least one chemical group for linking the long chain alkenyl or alkyl group with the amine group. Also disclosed are ink compositions incorporating the treated carbon blacks and processes for preparing the compositions.

Method of preparing oxidized modified pigments and inkjet ink compositions comprising the same

Abstract: The present invention relates to oxidized modified pigments and dispersions as well as methods of preparing them. Also disclosed are aqueous inkjet ink compositions comprising oxidized modified pigments.