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.

Lead-Acid Batteries and Pastes Therefor

Abstract: A paste suitable for a negative plate of a lead-acid battery comprises lead oxide and composite particles comprising carbon and silica

Anomalous freezing point depression of swollen gels

Abstract: The anomalous freezing point depression, ΔT, of benzene-swollen vulcanizates has previously been attributed to the limitation of (benzene) crystallite size by the polymer network. This study was initiated to determine the benzene crystallite size in a number of rubber and benzene systems. A special low-temperature specimen holder was designed and constructed in the Cambridge Laboratories for running diffraction patterns at temperatures near −30°C. X-ray line broadening techniques were used to study a series of filled and unfilled vulcanizates of varying crosslink density. The results indicate that crystallite size is not depressed to the degree predicted by freezing-point measurements. Benzene crystallite sizes were similar in all rubber benzene systems, regardless of degree of crosslinking or benzene fraction, although carbon black loading appears to increase crystallite size. This effect may be attributed to lesser depth of penetration of the x-rays due to greater density as carbon black loading increases. Additional studies measuring the ΔT for solutions and similar vulcanizates of NR and SBR over a wide range of rubber concentrations showed that at the same rubber in benzene fraction, crosslinking increases ΔT but the addition of carbon black reduces ΔT. An explanation for the observed phenomena is advanced.

Copper beryllium alloy and the manufacture thereof

Abstract: COPPER BERYLLIUM ALLOY AND THE MANUFACTURE THEREOF ABSTRACT OF THE DISCLOSURE A process for producing a copper beryllium alloy. The process includes the steps of: preparing a copper beryllium melt; casting the melt; hot working the cast copper beryllium;annealing the copper beryllium; cold working the annealed copper beryllium; and hardening the copper beryllium; and is characterized by the improvement comprising the steps of:solution annealing the cold worked copper beryllium at a tem-perature of from 1275 (691) to 1375°F (746°C); hardening the annealed copper beryllium at a temperature of from 400 (204) to 580°F (304°C); cold rolling the hardened copper beryllium; and stress relief annealing the cold worked copper beryllium at a temperature of from 400 (204) to 700°F (371°C). An alloy consisting essentially of, in weight percent, from .4 to 2.5% beryllium, up to 3.5% of material from the group consisitng of cobalt and nickel, up to 0.5% of material from the group consisting of titanium and zirconium, up to 0.3%iron, up to 0.7% silicon, up to 0.3% aluminum, up to 1.0% tin, up to 3.0% zinc, up to 1.0% lead, balance essentially copper. The alloy is characterized by equiaxed grains. The grains have an average grain size of less than 9 microns. Substantially all of the grains are less than 12 microns in size.

Methods for making aerogel composites

Abstract: Composites such as self-supporting rigid composites that include aerogel have low thermal conductivity and attractive mechanical properties. Methods for preparing such composites include, for example, combining an aerogel-containing material with a binder to form a slurry and allowing the slurry to harden. At least part of the hardening process in conducted under compression.

Methods for producing platinum powders

Abstract: Platinum powders and methods for producing platinum powders. The powders preferably have a small particle size, narrow size distribution and a spherical morphology. The method includes forming the particles by a spray pyrolysis technique. The invention also includes novel devices and products formed from the platinum powders.