The American Ceramic Society is a non-profit professional association for the ceramics and glass community, with a focus on scientific research, emerging technologies, and practical applications. It comprises more than 10,000 members from 80 countries, with membership including engineers, scientists, researchers, manufacturers, plant personnel, educators, students, and marketing and sales representatives. It is located in Westerville, Ohio. Visit ceramics.org to explore the ways ACerS can help navigate this unique class of materials. Wikipedia.
Thomas J.J.,Schlumberger |
Thomas J.J.,The American Ceramic Society |
Musso S.,Schlumberger |
Journal of the American Ceramic Society | Year: 2014
The kinetics of hydration of magnesium oxide (MgO) powder to form magnesium hydroxide (Mg(OH)2) were measured using isothermal calorimetry at different temperatures, and the morphology of the powders before and after hydration were examined. The hydration kinetics of light-burned MgO exhibit a hydration rate peak similar to that of portland cement hydration, whereas the hydration kinetics of hard-burned MgO are comparatively slower at the same temperature, and exhibit a continuously declining hydration rate after the first several minutes of reaction. The hydration kinetics of both lightburned and hard-burned MgO can be fit using a boundary nucleation and growth model that has previously been applied to the hydration of portland cement and tricalcium silicate. Activation energy values for MgO hydration were determined from the fitted rate constants and were also measured directly using small temperature excursions according to a recently proposed method. For light-burned MgO the resulting values are in good agreement and indicate a value of 77 kJ/mol. For the hard-burned MgO the activation energy values vary considerably depending on temperature and how the activation energy is measured, but are always lower than the value obtained for the light-burned MgO. © 2013 The American Ceramic Society.
Wray P.E.,The American Ceramic Society
Ceramic Engineering and Science Proceedings | Year: 2010
Scientific and technical developments coupled with a surge in demand in emerging markets for industrial and consumer goods have begun to accentuate current and potential problems with sourcing strategic minerals and metals. This includes materials already in broad usage in major industries (e.g., bauxite) and materials whose usage is expected to grow geometrically and that are linked to significant progressive societal developments (lithium and rare earths). While, in theory, the amount of reserves of these special raw materials may be adequate, their location and ownership, often in underdeveloped nations, is transforming the bargaining powers and interests of various owners, businesses and governments. Some nations and enterprises appear to be grasping the significance of the materials problems and are taking aggressive geopolitical steps to manage their long-terms risks. Other nations, such as the United States, appear more lackadaisical and disorganized in their approach and arguably are increasing the risk of negative outcomes to their economic, scientific and diplomatic standings. Nations that will be in the best position are those that are making sober and multipronged assessments of the risks posed by materials shortages and are willing to move apace to take methodical multilateral steps to address these risks.
Liu C.,Wuhan University of Technology |
Heo J.,Pohang University of Science and Technology |
Heo J.,The American Ceramic Society
International Journal of Applied Glass Science | Year: 2013
Tunable absorption and photoluminescence (PL) of lead chalcogenide quantum dots (QDs) doped in glasses due to the quantum confinements effect have been actively investigated for application as saturable absorbers, laser sources, and fiber-optic amplifiers. Optical properties of QDs have been carefully monitored by controlling their sizes through heat treatment and rare-earth ion doping. Two- and three-dimensional precipitation of lead chalcogenide QDs were also realized using silver ion exchange and femtosecond laser irradiation in combination with thermal treatment. Prototypes of microstructured single-mode fibers and tapered fiber amplifiers containing QDs proved potentials of these materials for fiber-optic amplifiers application. Further research works on QD-doped solid core fibers, surface passivation of quantum dots and their application for the mid-infrared optical devices are necessary. © 2013 The American Ceramic Society and Wiley Periodicals, Inc.
Vienna J.D.,Pacific Northwest National Laboratory |
Vienna J.D.,The American Ceramic Society
International Journal of Applied Glass Science | Year: 2010
Nuclear power plays a key role in maintaining current worldwide energy growth while minimizing the greenhouse gas emissions. A disposition path for used nuclear fuel (UNF) must be found for this technology to achieve its promise. One likely option is to recycle UNF and immobilize the high-level waste (HLW) by vitrification. Vitrification is the technology of choice for immobilizing HLW from defense and commercial fuel reprocessing around the world. Recent advances in both recycling technology and vitrification show great promise in closing the U.S. nuclear fuel cycle in an efficient fashion. This article summarizes the recent trends, developments, and future options in waste vitrification for both defense waste cleanup and closing the nuclear fuel cycle in the United States. © 2010 The American Ceramic Society and Wiley Periodicals, Inc.
Mellott N.P.,Alfred University |
Mellott N.P.,The American Ceramic Society |
Pantano C.G.,Pennsylvania State University
International Journal of Applied Glass Science | Year: 2013
Atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and solution analysis by inductively coupled plasma mass spectrometry (ICP-MS) were used to investigate the molecular scale processes responsible for the roughening of glass surfaces due to aqueous corrosion. The study of atomically smooth fiber and melt surfaces allowed direct investigation of the atomic and molecular scale effects of dissolution on surface roughness. The combined use of these analytical techniques clearly showed that the change in RMS roughness with aqueous corrosion could be directly related to the concentration of silica released to solution from the glass; cation leaching alone did not generate detectable roughening. It is well known that nano-/microscale surface roughness can influence strength, optical response, adsorptivity, and other surface properties of glass. It is shown here that the roughening of silicate glass surfaces can be expected based on the amount of silica released from the glass and does not show a dependence on the extent of modifier ion leaching. It is also suggested that the glass composition dependence of this roughening may be a measure of the nanoscale heterogeneity of the glass network structure. © 2013 The American Ceramic Society and Wiley Periodicals, Inc.