Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > Press > Super-light, super-insulating ceramic aerogel keeps the hottest temperatures at bay

An optical image showing an hBNAG sample resting on the stamen of a flower.

CREDIT
X. Xu and X. Duan
An optical image showing an hBNAG sample resting on the stamen of a flower. CREDIT X. Xu and X. Duan

Abstract:
Researchers have developed a near weightless material, comprised mostly of air, capable of both withstanding and protecting against some of the most extreme temperatures experienced in aerospace and industrial environments. It performed well when heated to 900 °Celsius (C) and then rapidly cooled to -198 °C, the authors say.

Super-light, super-insulating ceramic aerogel keeps the hottest temperatures at bay

Washington, DC | Posted on February 17th, 2019

Their new ceramic aerogel is engineered with unusual double-negative-index properties and demonstrates exceptional structural stability and superinsulation, making it an ideal material to be used in demanding applications like the heat shields on space vehicles. Aerogels are a composite material made mostly of air encompassed within a network of a solid medium, such as ceramic, metal, or carbon. Ceramic aerogels are incredibly lightweight and possess traits highly desired for enduring demanding environments. However, most conventional ceramic aerogels are brittle and susceptible to degradation due to extended high-temperature exposure or large and rapid temperature swings. According to the authors, these issues have greatly limited the use of ceramic aerogels as a super-insulating material. Xiang Xu and colleagues report on the design of a unique ceramic aerogel created using atomically thin sheets of hexagonal boron nitride (h-BN). By carefully engineering the ceramic aerogel microstructure, Xu et al. were able to achieve both a negative Poisson's ratio (a measure of a material's tendency to bulge outward when compressed) as well as a negative thermal expansion coefficient. To assess the material's mechanical and thermal capabilities, the authors ran a series of tests, including heating the aerogel to 900 °C and then rapidly cooling it -198 °C repeatedly, and at a rate of 275 °C per second. Xu et al. also evaluated the effect of long-term temperature stress by exposing the material to temperatures approaching 1500 °C in a vacuum. According to the results, the aerogel remained largely unchanged with near-zero strength loss following the rigorous trials. Manish Chhowalla and Deep Jariwala discuss the potential of the aerogel in a related Perspective.

####

For more information, please click here

Contacts:
Science Press Package Team

202-326-6440

Copyright © American Association for the Advancement of Science

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

RELATED JOURNAL ARTICLE:

Related News Press

News and information

Virginia Tech physicists propose path to faster, more flexible robots: Virginia Tech physicists revealed a microscopic phenomenon that could greatly improve the performance of soft devices, such as agile flexible robots or microscopic capsules for drug delivery May 17th, 2024

Gene therapy relieves back pain, repairs damaged disc in mice: Study suggests nanocarriers loaded with DNA could replace opioids May 17th, 2024

Shedding light on perovskite hydrides using a new deposition technique: Researchers develop a methodology to grow single-crystal perovskite hydrides, enabling accurate hydride conductivity measurements May 17th, 2024

Oscillating paramagnetic Meissner effect and Berezinskii-Kosterlitz-Thouless transition in cuprate superconductor May 17th, 2024

Aerogels

The lightest shielding material in the world: Protection against electromagnetic interference July 3rd, 2020

Researchers create ultra-lightweight ceramic material that withstands extreme temperatures: UCLA-led team develops highly durable aerogel that could ultimately be an upgrade for insulation on spacecraft February 15th, 2019

Researchers reduce expensive noble metals for fuel cell reactions August 22nd, 2016

Aspen Aerogels to Present at the 28th Annual ROTH Conference March 14th, 2016

Possible Futures

Advances in priming B cell immunity against HIV pave the way to future HIV vaccines, shows quartet of new studies May 17th, 2024

International research team uses wavefunction matching to solve quantum many-body problems: New approach makes calculations with realistic interactions possible May 17th, 2024

Aston University researcher receives £1 million grant to revolutionize miniature optical devices May 17th, 2024

Gene therapy relieves back pain, repairs damaged disc in mice: Study suggests nanocarriers loaded with DNA could replace opioids May 17th, 2024

Materials/Metamaterials/Magnetoresistance

How surface roughness influences the adhesion of soft materials: Research team discovers universal mechanism that leads to adhesion hysteresis in soft materials March 8th, 2024

Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024

Focused ion beam technology: A single tool for a wide range of applications January 12th, 2024

Catalytic combo converts CO2 to solid carbon nanofibers: Tandem electrocatalytic-thermocatalytic conversion could help offset emissions of potent greenhouse gas by locking carbon away in a useful material January 12th, 2024

Announcements

Virginia Tech physicists propose path to faster, more flexible robots: Virginia Tech physicists revealed a microscopic phenomenon that could greatly improve the performance of soft devices, such as agile flexible robots or microscopic capsules for drug delivery May 17th, 2024

Diamond glitter: A play of colors with artificial DNA crystals May 17th, 2024

Finding quantum order in chaos May 17th, 2024

Oscillating paramagnetic Meissner effect and Berezinskii-Kosterlitz-Thouless transition in cuprate superconductor May 17th, 2024

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

International research team uses wavefunction matching to solve quantum many-body problems: New approach makes calculations with realistic interactions possible May 17th, 2024

Gene therapy relieves back pain, repairs damaged disc in mice: Study suggests nanocarriers loaded with DNA could replace opioids May 17th, 2024

Shedding light on perovskite hydrides using a new deposition technique: Researchers develop a methodology to grow single-crystal perovskite hydrides, enabling accurate hydride conductivity measurements May 17th, 2024

Oscillating paramagnetic Meissner effect and Berezinskii-Kosterlitz-Thouless transition in cuprate superconductor May 17th, 2024

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