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Archives :: Processing & Handling :: Engineering Materials

Displaying 81 - 100 of 147 stories.
April 15, 2008
Advanced Diamond Technologies, Inc. (ADT; Romeoville, Ill.; edlinks.che.com/7371-533) has launched a new family of mechanical seals to improve efficiency, save energy and reduce costs in fluid-pumping systems. The patented UNCD (ultrananocrystalline diamond) Seals provide the benefits of a diamond at a cost comparable to silicon carbide face seals, according to ADT, which was formed in 2003 to...
http://www.che.com/processing_and_handling/engineering_materials/Chementator-Diamond-may-be-a-pumps-best-friend_3808.html
April 15, 2008
Of all known materials, carbon nanotubes (CNTs) have the highest thermal conductivity and mechanical strength as well as the ability to withstand the highest electric-current density, making them an attractive material for electric wiring, heat dissipation, field electron emission, and other applications. And graphene — a two-dimensional hexagonal lattice of carbon atoms — has become attractive...
http://www.che.com/processing_and_handling/engineering_materials/Chementator-This-composite-combines-the-unique-properties-of-two-new-forms-of-carbon_3809.html
April 15, 2008
Polyglycolic acid (PGA) has good properties: a very high gas impermeability, even under 80% humidity; biodegrability; high mechanical strength; and good moldability, which makes it a promising polymer for applications such as medical devices and barrier films. But up to now, it has been difficult to make large quantities of the material. Kureha Corp. (Tokyo, Japan; edlinks.che.com/7371-536) has developed a...
http://www.che.com/processing_and_handling/engineering_materials/Chementator-A-new-polymer-set-for-a-commercial-launch_3810.html
April 15, 2008
Sugar-beet processors in the U.S. generate approximately 40 million tons of fiber-rich sugar-beet pulp every year as a byproduct of sucrose extraction. Most of it is used as livestock feed or in pet food. Researchers with the U.S. Agricultural Research Service (ARS; edlinks.che.com/7371-542) are working on a process to convert the pulp into a filler for polylactic-acid-based plastics (PLA)...
http://www.che.com/processing_and_handling/engineering_materials/Chementator-Sugar-beet-pulp-may-cut-the-cost-of-biodegradable-plastic_3814.html
April 15, 2008
High-pressure die-cast (HPDC) aluminum alloys cannot normally be heated to high temperatures due to the presence of pores containing entrapped gases, which lead to the formation of surface blisters. CSIRO Materials Science and Engineering (Melbourne, Australia; edlinks.che.com/7371-548) has found that blistering can be avoided by using shorter solution-treatment times at lower temperatures. CSIRO says its...
http://www.che.com/processing_and_handling/engineering_materials/Chementator-Stronger-die-cast-parts_3820.html
April 15, 2008
Unidym, Inc., (Menlo Park, Calif.; edlinks.che.com/7371-549) has entered into a joint development agreement with Nippon Kayaku (Tokyo, Japan; edlinks.che.com/7371-550), to...
http://www.che.com/processing_and_handling/engineering_materials/Chementator-Novel-solar-electrode_3821.html
April 14, 2008
Batch reactor systems are used extensively in the pharmaceutical and fine chemical industries for the manufacture of small-volume, high-value products, in either dedicated or multipurpose production facilities. Stable and reproducible operating conditions are of great importance in order to achieve the batch times, optimum yields and product purity required to satisfy commercial requirements and the...
http://www.che.com/processing_and_handling/engineering_materials/A-Condenser-Made-of-Tantalum-CL-Clad-Dedicated-to-the-Pharmaceutical-and-Fine-Chemical-Industries_3778.html
March 15, 2008
On January 31, 2008, law firm Chadbourne & Parke LLP held its "Nanotechnology, Law & Commerce" forum exploring "Business at One-Billionth of a Meter." A total of 18 invited speakers explored a variety of topics including the current state of nanotech R&D; public policy, politics and legal issues; the financing and underwriting of nanotech; and "nanoethics." George...
http://www.che.com/processing_and_handling/engineering_materials/Newsfront-Forum-Makes-a-Big-Deal-about-Nanotech_3718.html
March 15, 2008
Next month, Taiyo Kagaku Co. (Yokkaichi, Japan; edlinks.che.com/7370-563) will start up a 20-m.t./yr plant — said to be the world’s first — for the production of mesoporous silica. Taiyo Kagaku developed the new production process based on technology first introduced by Toyota Central R&D Laboratories, Inc. (Aichi, Japan; CE, April 2004, p. 17). The commercial grade mesoporous silica...
http://www.che.com/processing_and_handling/engineering_materials/Chementator-A-commercial-debut-for-a-process-to-make-mesoporous-silica_3736.html
March 15, 2008
The Seebeck effect — the direct conversion of a temperature difference to electricity — is responsible for the operation of thermocouples. But taking advantage of this phenomenon to make electricity from waste heat in so-called thermoelectric (TE) devices has been hindered by the high cost or toxicity of common TE materials, such as lead-tellurium or cobalt-antimony. And up to now, production...
http://www.che.com/processing_and_handling/engineering_materials/Chementator-A-new-Mg2Si-production-process-promises-to-advance-thermoelectric-devices_3737.html
March 15, 2008
Henkel KGaA (Düsseldorf, Germany; edlinks.che.com/7370-581) has developed a new generation of plasticizer-free dispersion adhesives called Adhesin A 78 — a copolymer system whose formulation...
http://www.che.com/processing_and_handling/engineering_materials/Chementator-Phthalate-free-glue_3749.html
February 15, 2008
Another corrosion-resistant material deserves a mention In the December 2007 article, The Heat Is On (pp. 24–28) I take issue with the statement next to the Pfaudler photo, “Tantalum and glass-lined steel are the two most corrosion resistant materials used in the chemical and pharmaceutical industries.” They are two of the most corrosion resistant materials, but our Hexoloy Sintered Alpha...
http://www.che.com/processing_and_handling/engineering_materials/February-Letters_3676.html
February 15, 2008
Nanostructured microporous carbons containing well-dispersed metal nanoparticles have the potential to improve the performance of fuel cells or catalysis. However, traditional techniques for embedding metal particles in porous carbons (post-synthesis treatment either by impregnation, adsorption, or ion exchange) can lead to uncontrolled growth of metal particle size, shape and aggregation, which can cause...
http://www.che.com/processing_and_handling/engineering_materials/Chementator-One-less-step-to-make-activated-carbon-with-dispersed-metal-nanoparticles_3685.html
February 15, 2008
A team of researchers from MIT’s (Cambridge, Mass.; edlinks.che.com/7369-540) chemical and mechanical engineering departments, in association with the U.S. Air Force Research Laboratory (Edwards Air Force Base, Calif.), has developed oil-repellent surfaces with likely separations and safety applications for the chemical process industries. Due to the high-surface-tension of water (γlv = 72.1...
http://www.che.com/processing_and_handling/engineering_materials/Chementator-Super-oleophobic-materials-promise-revolutionary-membranes_3689.html
February 15, 2008
Technical innovations in light emitting diodes (LEDs) and photovoltaics have consistently reflected the similarities between the two technologies. In fact, research groups at many universities, such as  the University of Michigan (Ann Arbor, Mich.; www.umich.edu) and the University of Southern California (USC; Los Angeles, Calif.; www.usc.edu), are studying both simultaneously. With pressing consumer...
http://www.che.com/processing_and_handling/engineering_materials/Photons-to-electrons-and-vice-versa_3697.html
January 15, 2008
Among the many types of pollution-abatement systems that are in use today, wet fluegas desulfurization (FGD) systems — also known as wet scrubbers — are notoriously capital- and maintenance-intensive. These systems are widely used by electric power plants and chemical process facilities to capture and neutralize sulfur-laden fluegas, and help plant operators to meet strict federal and state...
http://www.che.com/processing_and_handling/engineering_materials/Controlling-SO2-Without-Corroding-the-Bottom-Line_3605.html
January 15, 2008
Low-cost, corrosion-resistant castings are being produced using epoxy and mineral aggregates Stainless steel, painted and plated cast-iron and steel structures are being replaced at a fraction of the cost with high-precision polymer castings (PPCs). PPCs can usually be cast to tolerance, thus eliminating machining. Because they are produced from an epoxy-resin material, painting, plating and anodizing are...
http://www.che.com/processing_and_handling/engineering_materials/Engineering-Practice-Corrosion-Resistance-Using-Rock-and-Glue_3607.html
January 15, 2008
Metallic nanoparticles are usually produced by wet chemical methods, often using toxic and flammable substances, or by physical methods such as evaporation and laser ablation. A group from the Laboratory for Sustainable Technology, School of Chemical and Biomolecular Engineering, at the University of Sydney (Australia; edlinks.che.com/7368-534), has been experimenting with the synthesis of nanoparticles of...
http://www.che.com/processing_and_handling/engineering_materials/Chementator-Using-Living-Plants-to-Synthesize-Metallic-Nanoparticles_3615.html
December 15, 2007
The standard temperature range for waste-rubber pyrolysis has been reported as 480 – 1,740ºF. Within 480 – 750ºF, shredded tire scrap decomposes into increasing amounts of gases and oil; and above 750ºF, oil and solid char yields can decrease relative to gas production. At these higher temperatures both the gases and oil produced are high in carcinogenic polycyclic aromatic...
http://www.che.com/processing_and_handling/engineering_materials/Chementator-New-Pyrolysis-Method-Improves-Carbon-Black-Recovery-from-Scrap-Tires_3577.html
December 15, 2007
A plastic membrane that allows CO2 and other small molecules to move through its pores while largely preventing the movement of larger molecules like CH4, has been developed by a team of researchers from CSIRO Materials Science and Engineering and the Water for a Healthy Country Flagship (Melbourne, Australia; edlinks.che.com/6902-537); the Center for Energy and Environmental Resources, the Department of...
http://www.che.com/processing_and_handling/engineering_materials/Chementator-This-Membrane-Mimics-Mother-Nature-to-Separate-CO2_3579.html
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