by David L. Chandler for MIT News
Boston MA (SPX) Dec 22, 2011
Thanks to a new online toolkit developed at MIT and the Lawrence Berkeley National Laboratory, any researcher who needs to find a material with specific properties - whether it's to build a better mousetrap or a better battery - will now be able to do so far more easily than ever before.
Using a website called the Materials Project, it's now possible to explore an ever-growing database of more than 18,000 chemical compounds. The site's tools can quickly predict how two compounds will react with one another, what that composite's molecular structure will be, and how stable it would be at different temperatures and pressures.
The project is a direct outgrowth of MIT's Materials Genome Project, initiated in 2006 by Gerbrand Ceder, the Richard P. Simmons (1953) Professor of Materials Science and Engineering. The idea, he says, is that the site "would become the Google of material properties," making available data previously scattered in many different places, most of them not even searchable.
For example, it used to require months of work - consulting tables of data, performing calculations and carrying out precise lab tests - to create a single phase diagram showing when compounds incorporating several different elements would be solid, liquid or gas. Now, such a diagram can be generated in a matter of minutes, Ceder says.
The new tool could revolutionize product development in fields from energy to electronics to biochemistry, its developers say, much as search engines have transformed the ability to search for arcane bits of knowledge.
U.S. Secretary of Energy Steven Chu said in a press release announcing the Materials Project's launch that it could "drive discoveries that not only help power clean energy, but are also used in common consumer products." This accelerated process, Chu added, could "potentially create new domestic industries."
The Materials Project is much more than a database of known information, Ceder says: The tool computes many materials' properties in real time, upon request, using the vast supercomputing capacity of the Lawrence Berkeley Lab. "We still don't know most of the properties of most materials," he says, but adds that in many cases these can be derived from known formulas and principles.
Already, more than 500 researchers from universities, research labs and companies have used the new system to seek new materials for lithium-ion batteries, photovoltaic cells and new lightweight alloys for use in cars, trucks and airplanes. The Materials Project is available for use by anyone, although users must register (free of charge) in order to spend more than a few minutes, or to use the most advanced features.
There are about 100,000 known inorganic compounds, Ceder says; using the computational tools incorporated into this project, "it is now within reach to calculate properties over the whole known universe of compounds." He adds that this achievement makes possible, for the first time, the development of an exhaustive database of material properties derived from the fundamental equations of basic physics.
"This is what the field [of materials science] has been working on for 30 years," Ceder says. Starting in the 1980s, "people started to develop predictive models that were more than accurate enough to make decisions on. You can predict voltage, stability, mobility of ions" and many other properties, he says, although other properties "are still challenging" to predict this way.
The tools could also make a big difference in education, Ceder says: When professors set up experiments to help students learn specific principles, "it used to be that we had to pick easy examples" with known outcomes, he says. Now, it's possible to set much more challenging exercises.
"Lack of information was a real problem in materials science," Ceder says. When a company needed to come up with a new material for a battery or a building or a consumer product, in many cases this required starting from scratch, because even information about materials that had already been studied was so hard to locate. "I really do think this will transform the way people do materials research," Ceder says.
As Chu stressed in a Nov. 30 talk at MIT, the development of new materials for clean energy, transportation, electronics and other fields could be the key to revitalizing the American manufacturing industry and giving the nation a new competitive edge.
Mark Obrovac, an associate professor of chemistry and physics at Dalhousie University in Nova Scotia, says, "The Materials Project has made complex computational techniques available to materials researchers at a click of a mouse.
"This is a major innovation in materials science, enabling researchers to rapidly predict the structure and properties of materials before they make them, and even of materials that cannot be made. This can significantly accelerate materials development in many important areas, including advanced batteries, microelectronics and telecommunications."
Vincent Chevrier, a product development engineer at 3M Co. who has been using the system for several months, says, "I think it's a tool that's immensely valuable to almost anybody interested in materials development," and adds that it "will have a broad impact on a wide spectrum of industries. There are things I simply would not have been able to do without this tool."
"I don't think we're going to be manufacturing the old things," Ceder says. "We have to be constantly innovating. If we could do more rapid materials development, we could push things out into manufacturing much faster." And now, with the Materials Project, "people can go on [the website] and extract useful data in five minutes."
Space Technology News - Applications and Research
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Infrared technology for measuring the effect of fire on materials
Madrid, Spain (SPX) Dec 21, 2011
The main problem associated with measuring the effects of fire on materials lies in the temperature of the flames, which reaches over 1000 C and can obscure the actual temperature of the material. In addition, there is the problem of the high concentration of gasses (CO2, H2O and others), which makes it difficult to obtain clear images of the sample being subjected to fire. In order to sol ... read more
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