Thermal Management Challenges, Requirements and Solutions for the Electronics Industry

Thermal Live 2015 is a brand new, FREE, 3-day online event focused on Thermal Management Techniques and topics. The event features webinars, roundtables, whitepapers, videos and more. There is no cost to attend.

Registration is Now Open for the Free Webinar, “Thermal Management Challenges, Requirements and Solutions for the Electronics Industry,” presented by Honeywell.

Overview: This webinar will discuss the key thermal properties involved in TIM decision-making, the challenging thermal requirements of key applications, a comparison of solutions available to the marketplace, and the promise of next-generation PCMs designed to meet the constantly changing demands of the electronics industry.

Learn more about Thermal Live 2015 and register now.

Original Source http://ift.tt/1JTdSnv

Advertisements

Satellite Cooling System Paves Way for More Compact Sensor Systems

A team of scientists from Lockheed Martin have produced a small satellite cooling system, the high power Microcryocooler, which is the lightest on the market and three times more powerful than the company’s first design. This design will pave the way for smaller and more compact IR sensor systems and novel sensor configurations.

“The High Power Microcryocooler is making a large impact for small products. Our previous design was a revolution in size, and now we’re taking it further and packing it with increased power. This will make a difference for technology in space, on naval ships and aboard aircraft,” Dr. Jeffrey Olson, a research scientist at Lockheed Martin, said.

The reduction in size and its compact design will lead to cheaper satellites and launches for the aerospace industry.

“Highly sophisticated electronics like satellite sensors and cameras need to be cooled to detect what they’re designed to capture, even to temperatures as low as -320 F (-195 C). Smaller cryocoolers mean more affordable satellites and launches, and they have applications on Earth, too. With higher power, this microcryocooler enables larger, more sensitive IR sensors, which is especially useful for very high-resolution images,” according to Phys.org.

Original Source http://ift.tt/1LReyvS

Lithium Atoms Turn Graphene into a Superconductor

Physicists in Canada and Germany have proved that graphene turns into a superconductor when ‘decorated’ with lithium atoms, which could lead to a new generation of superconducting nanoscale devices, according to Nanotechweb.org.

In 2005, physicists demonstrated that when chemically treated, graphite could exhibit superconducting properties.

“Theorists identified the underlying mechanism for that superconductivity as electron–phonon coupling. Phonons are vibrations in a material’s crystal lattice that bind electrons together into “Cooper pairs” that can travel through the lattice without resistance – one of the hallmarks of superconductivity. It was then realized that such electron–phonon coupling might occur not just in bulk graphite compounds but also by depositing atoms of a suitable element on to single layers of graphene,” according to researchers.

Then, in 2012, Gianni Profeta from the University of L’Aquila in Italy, along with his colleagues, used computer modeling to predict that lithium could be a good candidate for coupling.

“This came as a surprise, given that bulk LiC6 had not been shown to superconduct, but the researchers nevertheless found that the monolayer structure should promote superconductivity in two ways. The additional lattice vibrations generated by the lithium atoms should yield a high density of phonons, they said, while lithium’s donation of electrons to the graphene should strengthen overall electron–phonon coupling,” according to Nanotechweb.org.

This knowledge assisted Andrea Damascelli from the University of British Colombia in Vancouver and a team in Europe to fully transform Graphene into a superconductor. The physicists achieved this by growing layers of graphene on silicon-carbide substrates and then depositing lithium atoms onto the graphene in a process known as “decorating.”

“The team then studied the properties of the samples using angle-resolved photoemission spectroscopy, which exploits the photoelectric effect to measure the momentum and kinetic energy of electrons in a solid. The researchers found that the electrons were being slowed down as they travelled through the lattice, an effect that they attributed to enhanced electron–phonon coupling. Crucially, they also showed that this greater coupling leads to superconductivity by identifying an energy gap between the material’s conducting and non-conducting electrons – which is the energy needed to break Cooper pairs. At 0.9 meV, the measured value of this gap implies a transition temperature of about 5.9 K – as compared with Profeta and colleagues’ prediction of up to about 8 K,” according to Nanotechweb.org.

The next step for the team is to demonstrate superconductivity in a single layer of graphene and to incorporate this single substrate into electronic devices.

Original Source http://ift.tt/1Fg3XTw

Non-drip Epoxy Paste Cures Optically Clear

Master Bond Inc. introduces the Master Bond EP21NDCL – a new two component non-drip epoxy paste that cures optically clear in thin sections. It is ideal for bonding, coating and sealing applications in aerospace, electrical, opto-electronic and specialty OEM industries.

The Master Bond EP21NDCL bonds well to plastics, rubbers, glass, metals, ceramics and other materials and it also resists chemicals such as acids, bases, salts, oils, fuels and water.

The new epoxy cures at room temperature and cures even faster in higher temperatures. “Upon curing, this epoxy features durable bonds with high tensile lap shear, tensile and compressive strength of 2,600-2,800 psi, 6,500-7,500 psi and 12,000-13,000 psi, respectively,” according to the company.

The EP21NDCL offers a shelf life of one year at 75 degrees Fahrenheit in its original, unopened container.  It also offers advanced electrical insulation, a volume resistivity greater than 1014 ohm-cm and an operating temperature range of -60 to +250 degrees Fahrenheit.

Original Source http://ift.tt/1KD0chj

Three New Liquid Cooling Patent Issued – Company Reaches 50th Patent

CoolIT Systems, Inc. announced the U.S. Patent and Trademark Office has granted the company three new patents for liquid cooling. With these, CoolIT Systems has reached its 50th patent milestone.

The three newly issued patents include USPTO 9057567 Microchannel Coldplate, USPTO 9052252 Leak Detection System and USPTO 9055697 Air Conditioning System Control.

“USPTO 9057567 Microchannel Coldplate protects a sophisticated method of managing the fluid flow through a microchannel cold plate to maximize the efficient transfer of heat from a microprocessor into a liquid flow while minimizing the pressure drop and the physical size of the cold plate. This invention further ensures the exclusive advantage that CoolIT liquid cooling system designs have over competitive systems by minimizing the pumping power to effectively cool thermally dense processors of today and tomorrow,” according to the company.

“USPTO 9052252 Leak Detection System is a sensor system compatible with all existing server platforms that provides instant notification if any moisture or condensation were to form inside the server and USPTO 9055697 Air Conditioning System Control describes a method to automatically map and monitor the temperature distribution in an entire data center. By using this technology, a data center operator can optimize the cooling resources on a very granular basis and therefore minimize the power consumption required to adequately and efficiently cool the datacenter equipment,” the company added.

Original Source http://ift.tt/1KD0bd5

Liquid Dispensed Thermal Interface Materials (TIMs) – Free Roundtable

Thermal Live 2015 is a brand new, FREE, 3-day online event focused on Thermal Management Techniques and topics. The event features webinars, roundtables, whitepapers, videos and more. There is no cost to attend.

Registration is Now Open for the Free Roundtable, “Liquid Dispensed Thermal Interface Materials (TIMs),” presented by Bergquist.

Overview: This roundtable will discuss how effective thermal management is key to ensuring consistent long-term performance and reliability in electronic devices. With an increasing variety of electronic applications demanding smaller packaging, higher power, and lower cost, the need for innovative high performance, low cost thermal solutions continues to grow.

Learn more about Thermal Live 2015 and register now.

Original Source http://ift.tt/1EgivaE

Graphene Grown From Tea Tree Extract

Scientists have successfully grown high-quality graphene from a tea tree plant known as Melaleuca alternifolia. This plant is commonly used to make oils and medicine. The scientists’ paper has been published in a recent issue of Nano Letters.

“The researchers demonstrated that they could fabricate large-area, nearly defect-free graphene films from tea tree oil in as little as a few seconds to a few minutes, whereas current growth methods usually take several hours. Unlike current methods, the new method also works at relatively low temperatures, does not require catalysts, and does not rely on methane or other nonrenewable, toxic, or explosive precursors,” according to Phys.org.

The team used a technique known as plasma-enhanced chemical vapor deposition to grow graphene. This technique involves feeding the vaporized extract into a heated tube and switching the plasma on the electrodes, thus transforming the vapor into a graphene film.

“This research realizes fabrication of good-quality, few-layer graphene from an environmentally friendly precursor. Overall, large-area graphene fabrication using a fast, environmentally friendly precursor and process at a relatively low fabrication temperature is the major significance of this work,” Prof. Mohan V. Jacob of Cook University, told Phys.org.

The researchers believe graphene films produced from the tea tree extract may have potential use in applications in the near future, such as next-generation memory devices known as memristors. Memristors store memory in their levels of electrical resistance. The team plans to explore other possible applications of the film.

Original Source http://ift.tt/1UaZbOf