Formula for turning cement into 'metal'
"This new material has lots of applications, including as thin-film resistors used in liquid-crystal displays, basically the flat panel computer monitor that you are probably reading this from at the moment," said Chris Benmore, a physicist from the U.S. Department of Energy's (DOE) Argonne National Laboratory who worked with a team of scientists from Japan, Finland and Germany to take the "magic" out of the cement-to-metal transformation. Benmore and Shinji Kohara from Japan Synchrotron Radiation Research Institute/SPring-8 led the research effort.
This change demonstrates a unique way to make metallic-glass material, which has positive attributes including better resistance to corrosion than traditional metal, less brittleness than traditional glass, conductivity, low energy loss in magnetic fields, and fluidity for ease of processing and molding. Previously, only metals have been able to transition to a metallic-glass form. Cement does this by a process called electron trapping, a phenomena only previously seen in ammonia solutions. Understanding how cement joined this exclusive club opens the possibility of turning other solid normally insulating materials into room-temperature semiconductors.
"This phenomenon of trapping electrons and turning liquid cement into liquid metal was found recently, but not explained in detail until now," Benmore said. "Now that we know the conditions needed to create trapped electrons in materials we can develop and test other materials to find out if we can make them conduct electricity in this way."
The results were reported May 27 in the journal the Proceeding of the National Academy of Sciences in the article "Network topology for the formation of solvated electrons in binary CaO-Al2O3 composition glasses."
The team of scientists studied mayenite, a component of alumina cement made of calcium and aluminum oxides. They melted it at temperatures of 2,000 degrees Celsius using an aerodynamic levitator with carbon dioxide laser beam heating. The material was processed in different atmospheres to control the way that oxygen bonds in the resulting glass. The levitator keeps the hot liquid from touching any container surfaces and forming crystals. This let the liquid cool into glassy state that can trap electrons in the way needed for electronic conduction. The levitation method was developed specifically for in-situ measurement at Argonne's Advanced Photon Source by a team led by Benmore.
The scientists discovered that the conductivity was created when the free electrons were "trapped" in the cage-like structures that form in the glass. The trapped of electrons provided a mechanism for conductivity similar to the mechanism that occurs in metals.
To uncover the details of this process, scientists combined several experimental techniques and analyzed them using a supercomputer. They confirmed the ideas in experiments using different X-ray techniques at Spring 8 in Japan combined with earlier measurements at the Intense Pulsed Neutron Source and the Advanced Photon Source.
Research was supported by the Ministry of Education, Culture, Sports, Science, and Technology of Japan, the Japan Science and Technology Agency, and the Academy of Finland.
Welcome to SUV System Ltd!
SUV System Ltd is ISO 90012008 Certified electronics distributor with 10 years of experiences.
We have built up long term business relationship with about many companies which are stockers and authorized agents. we have a steady and reliable supply to meet customer's demands to the greatest extent .Confidently, we are able to lower your cost and support your business with our years of professional service.
SUV System Ltd is Electronic Components Distributor Supplies,Find Quality Electronic Components Supplies Products IC(Integrated Circuits),Connectors,Capacitor,Resistors,Diodes,Transistors,LED at Suvsystem.com. Sourcing Other Energy, Environment, Excess Inventory Products from Manufacturers and Suppliers at Suvsystem.com
Electronic Components distributor:http://www.suvsystem.com
Connectors Distributor:http://www.suvsystem.com/l/Connectors-1.html
IC Distributor:http://www.suvsystem.com/l/IC(Integrated-Circuits)-1.html
LED Distributor:http://www.suvsystem.com/l/LED-1.html
Capacitor Distributor:http://www.suvsystem.com/l/Capacitor-1.html
Transistor Distributor:http://www.suvsystem.com/l/Transistors-1.html
Resistor Distributor:http://www.suvsystem.com/l/Resistors-1.html
Diode Distributor:http://www.suvsystem.com/l/Diodes-1.html
SUV System Ltd insists on the managing faith ofsincereness,speciality,foresight, win-win,so we build up stable-relationship customers located all over the world, including the States, Europe, Argentina, UAE, Malaysia, Australia,and India etc
we are focus on the following fields,and hope we can help you.
CRCW120643K0JNTA CRCW120643K0JNEA CRCW120643K0FKTA CRCW120643K0FKEA CRCW1206432RFKTA CRCW1206432RFKEA CRCW1206432KFKTA CRCW1206432KFKEA CRCW1206430RJNTA CRCW1206430RJNEAIF CRCW1206430RJNEA CRCW1206430RFKTA CRCW1206430RFKEA CRCW1206430KJNTA CRCW1206430KJNEB CRCW1206430KJNEA CRCW1206430KFKTA CRCW1206430KFKEA CRCW120642R2FKTA CRCW120642R2FKEA CRCW120647K0JNEB CRCW120647K0JNEAHP CRCW120647K0JNEA CRCW120647K0FKTA CRCW120647K0FKEAHP CRCW120647K0FKEA CRCW1206475RFKTB CRCW1206475RFKTA CRCW1206475RFKEB CRCW1206475RFKEA CRCW1206475KFKTA CRCW1206475KFKEA CRCW1206470RJNTB CRCW1206470RJNTA CRCW1206470RJNEB CRCW1206470RJNEAIF CRCW1206470RJNEAHP CRCW1206470RJNEA CRCW1206470RFKTA CRCW1206470RFKEB
http://www.suvsystem.com/a/1707.aspx
