Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > High-power electronics keep their cool with new heat-conducting crystals

Materials science and engineering professor and department head David Cahill co-led research that helped optimize the synthesis of boron arsenide – a highly thermally conductive material – to help dissipate heat inside high-powered electronics.

Photo by L. Brian Stauffer
Materials science and engineering professor and department head David Cahill co-led research that helped optimize the synthesis of boron arsenide – a highly thermally conductive material – to help dissipate heat inside high-powered electronics. Photo by L. Brian Stauffer

Abstract:
The inner workings of high-power electronic devices must remain cool to operate reliably. High internal temperatures can make programs run slower, freeze or shut down. Researchers at the University of Illinois at Urbana-Champaign and The University of Texas, Dallas have collaborated to optimize the crystal-growing process of boron arsenide – a material that has excellent thermal properties and can effectively dissipate the heat generated in electronic devices.

High-power electronics keep their cool with new heat-conducting crystals

Champaign, IL | Posted on July 6th, 2018

The results of the study, published in the journal Science, mark the first realization of previously predicted class of ultrahigh thermal conductivity materials. Boron arsenide is not a naturally occurring material, so scientists must synthesize it in the lab, the researchers said. It also needs to have a very specific structure and low defect density for it to have peak thermal conductivity, so that its growth happens in a very controlled way.

“We studied the structural defects and measured the thermal conductivity of the boron arsenide crystals produced at UT Dallas,” said co-author David Cahill, a professor and head of the department of materials science and engineering at Illinois. “Our experiments also show that the original theory is incomplete and will need to be refined to fully understand the high thermal conductivity.”

Most of today’s high-performance computer chips and high-power electronic devices are made of silicon, a crystalline semiconducting material that does an adequate job of dissipating heat. But in combination with other cooling technology incorporated into devices, silicon can handle only so much, the team said.

Diamond has the highest known thermal conductivity – about 15 times that of silicon – but there are problems when it comes to using it for thermal management of electronics.

“Although diamond has been incorporated occasionally in demanding heat-dissipation applications, the cost of natural diamonds and structural defects in manmade diamond films make the material impractical for widespread use in electronics,” said co-author Bing Lv, a physics professor at UT Dallas.

“The boron arsenide crystals were synthesized using a technique called chemical vapor transport,” said Illinois postdoctoral researcher Qiye Zheng. “Elemental boron and arsenic are combined while in the vapor phase and then cool and condense into small crystals. We combined extensive materials characterization and trial-and-error synthesis to find the conditions that produce crystals of high enough quality.”

The Illinois team used electron microscopy and a technique called time-domain thermoreflectance to determine if the lab-grown crystals were free of the types of defects that cause a reduction in thermal conductivity.

“We measured dozens of the boron arsenide crystals produced in this study and found that the thermal conductivity of the material can be three times higher than that of best materials being used as heat spreaders today,” Zheng said.

The next step in the work will be to try other processes to improve the growth and properties of this material for large-scale applications, the researchers said.

The Office of Naval Research and the Air Force Office of Scientific Research supported this study.

####

For more information, please click here

Contacts:
LOIS YOKSOULIAN
PHYSICAL SCIENCES EDITOR
217-244-2788


David Cahill
217-333-6753;


To reach Bing Lv

Copyright © University of Illinois at Urbana-Champaign

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

The paper “High thermal conductivity in cubic boron arsenide crystals” is available online and from the U. of I. News Bureau. DOI: 10.1126/science.aat8982:

Related News Press

News and information

'Smart skin' simplifies spotting strain in structures: Rice U. invention can use fluorescing carbon nanotubes to reveal stress in aircraft, structures November 15th, 2018

Epoxy compound gets a graphene bump: Rice scientists combine graphene foam, epoxy into tough, conductive composite November 14th, 2018

GLOBALFOUNDRIES, indie Semiconductor Deliver Performance-Enhanced Microcontrollers for Automotive Applications: 55nm LPx platform, with SST’s highly reliable embedded SuperFlash®, increases performance and energy efficiency for automotive applications November 13th, 2018

GLOBALFOUNDRIES, indie Semiconductor Deliver Performance-Enhanced Microcontrollers for Automotive Applications: 55nm LPx platform, with SST’s highly reliable embedded SuperFlash®, increases performance and energy efficiency for automotive applications November 13th, 2018

Govt.-Legislation/Regulation/Funding/Policy

'Smart skin' simplifies spotting strain in structures: Rice U. invention can use fluorescing carbon nanotubes to reveal stress in aircraft, structures November 15th, 2018

Epoxy compound gets a graphene bump: Rice scientists combine graphene foam, epoxy into tough, conductive composite November 14th, 2018

European Commission Project Creates Pilot Line for Companies to Develop Mid-Infrared Devices: Companies Can Submit Proposals for Possible Matching Funds To Help Develop Prototypes November 13th, 2018

Unlocking the Secrets of Metal-Insulator Transitions: X-ray photon correlation spectroscopy at NSLS-II's CSX beamline used to understand electrical conductivity transitions in magnetite November 8th, 2018

Possible Futures

'Smart skin' simplifies spotting strain in structures: Rice U. invention can use fluorescing carbon nanotubes to reveal stress in aircraft, structures November 15th, 2018

Epoxy compound gets a graphene bump: Rice scientists combine graphene foam, epoxy into tough, conductive composite November 14th, 2018

Optimization of alloy materials: Diffusion processes in nano particles decoded November 13th, 2018

Arrowhead Pharmaceuticals Presents Late-Breaking Preliminary Clinical Data on ARO-HBV at Liver Meeting® 2018 November 9th, 2018

Chip Technology

Epoxy compound gets a graphene bump: Rice scientists combine graphene foam, epoxy into tough, conductive composite November 14th, 2018

GLOBALFOUNDRIES, indie Semiconductor Deliver Performance-Enhanced Microcontrollers for Automotive Applications: 55nm LPx platform, with SST’s highly reliable embedded SuperFlash®, increases performance and energy efficiency for automotive applications November 13th, 2018

GLOBALFOUNDRIES, indie Semiconductor Deliver Performance-Enhanced Microcontrollers for Automotive Applications: 55nm LPx platform, with SST’s highly reliable embedded SuperFlash®, increases performance and energy efficiency for automotive applications November 13th, 2018

Unlocking the Secrets of Metal-Insulator Transitions: X-ray photon correlation spectroscopy at NSLS-II's CSX beamline used to understand electrical conductivity transitions in magnetite November 8th, 2018

Nanoelectronics

2-D magnetism: Atom-thick platforms for energy, information and computing research: Scientists say the tiny 'spins' of electrons show potential to one day support next-generation innovations in many fields October 31st, 2018

Machine learning helps improving photonic applications September 28th, 2018

How a tetrahedral substance can be more symmetrical than a spherical atom: A new type of symmetry September 14th, 2018

Laser sintering optimized for printed electronics: New study sheds (laser) light on the best means of laying down thin-film circuitry September 13th, 2018

Discoveries

'Smart skin' simplifies spotting strain in structures: Rice U. invention can use fluorescing carbon nanotubes to reveal stress in aircraft, structures November 15th, 2018

Epoxy compound gets a graphene bump: Rice scientists combine graphene foam, epoxy into tough, conductive composite November 14th, 2018

Optimization of alloy materials: Diffusion processes in nano particles decoded November 13th, 2018

Unlocking the Secrets of Metal-Insulator Transitions: X-ray photon correlation spectroscopy at NSLS-II's CSX beamline used to understand electrical conductivity transitions in magnetite November 8th, 2018

Materials/Metamaterials

Optimization of alloy materials: Diffusion processes in nano particles decoded November 13th, 2018

Unlocking the Secrets of Metal-Insulator Transitions: X-ray photon correlation spectroscopy at NSLS-II's CSX beamline used to understand electrical conductivity transitions in magnetite November 8th, 2018

Physicists name and codify new field in nanotechnology: ‘electron quantum metamaterials:’ UC Riverside’s Nathaniel Gabor and colleague formulate a vision for the field in a perspective article November 5th, 2018

Eco-friendly waterproof polymer films synthesized using novel method October 31st, 2018

Announcements

'Smart skin' simplifies spotting strain in structures: Rice U. invention can use fluorescing carbon nanotubes to reveal stress in aircraft, structures November 15th, 2018

Epoxy compound gets a graphene bump: Rice scientists combine graphene foam, epoxy into tough, conductive composite November 14th, 2018

GLOBALFOUNDRIES, indie Semiconductor Deliver Performance-Enhanced Microcontrollers for Automotive Applications: 55nm LPx platform, with SST’s highly reliable embedded SuperFlash®, increases performance and energy efficiency for automotive applications November 13th, 2018

GLOBALFOUNDRIES, indie Semiconductor Deliver Performance-Enhanced Microcontrollers for Automotive Applications: 55nm LPx platform, with SST’s highly reliable embedded SuperFlash®, increases performance and energy efficiency for automotive applications November 13th, 2018

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

'Smart skin' simplifies spotting strain in structures: Rice U. invention can use fluorescing carbon nanotubes to reveal stress in aircraft, structures November 15th, 2018

Epoxy compound gets a graphene bump: Rice scientists combine graphene foam, epoxy into tough, conductive composite November 14th, 2018

Optimization of alloy materials: Diffusion processes in nano particles decoded November 13th, 2018

Unlocking the Secrets of Metal-Insulator Transitions: X-ray photon correlation spectroscopy at NSLS-II's CSX beamline used to understand electrical conductivity transitions in magnetite November 8th, 2018

Military

'Smart skin' simplifies spotting strain in structures: Rice U. invention can use fluorescing carbon nanotubes to reveal stress in aircraft, structures November 15th, 2018

Epoxy compound gets a graphene bump: Rice scientists combine graphene foam, epoxy into tough, conductive composite November 14th, 2018

Unlocking the Secrets of Metal-Insulator Transitions: X-ray photon correlation spectroscopy at NSLS-II's CSX beamline used to understand electrical conductivity transitions in magnetite November 8th, 2018

Physicists name and codify new field in nanotechnology: ‘electron quantum metamaterials:’ UC Riverside’s Nathaniel Gabor and colleague formulate a vision for the field in a perspective article November 5th, 2018

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project