News

News

Ultra-light ceramic aerogel stands up to intense temperature swings

Date: 2019-08-21
Views: 429

Ultra-light ceramic aerogel stands up to intense temperature swings

Samples of the new ceramic aerogel, which is incredibly lightweight and can withstand intense heat fluctuations(Credit: Oszie Tarula/UCLA)


Ceramic aerogels have been protecting industrial equipment and space-bound scientific instruments for decades, thanks to their incredible lightness and ability to withstand intense heat. The problem is they can be pretty brittle. Now, a team led by researchers at the University of California Los Angeles (UCLA) has developed a new ceramic aerogel that's far hardier and more flexible, even after repeated exposure to wild temperature swings.


Aerogels are strong, solid structures that are up to 99 percent air by volume, which of course makes them incredibly lightweight. They can be made of many different types of materials, but ceramics are particularly handy as thermal insulators. On the flipside though, extended cycles of heating and cooling can end up fracturing the material.


In this case, the researchers made their aerogel out of thin layers of the ceramic material boron nitride, with its atoms arranged in a hexagonal pattern. To test out how well it performed, the team put samples of the stuff in a chamber and fluctuated the temperature between -198° C and 900° C (-324° F and 1,652° F), with just a few seconds between each extreme. The material was also left in a chamber heated to 1,400° C (2,552° F) for a week. Altogether it was found to lose only one percent of its mechanical strength.


Ultra-light ceramic aerogel stands up to intense temperature swings

According to the team, the key to the ceramic aerogel's strength is its unique architecture. Unlike most ceramics which expand when heated, the aerogel contracts instead, and it does so in a strange way. If you imagine pressing down on the top of a tennis ball, the sides would bulge outwards – but squeezing this aerogel, the sides would also push themselves inwards. The stuff can fully bounce back after being compressed to just five percent of its original volume, while other aerogels can't go any lower than 20 percent.

The team says that this aerogel, as well as others made using the same process, could lead to a new class of ultra-strong, ultra-light materials.


'Those materials could be useful for thermal insulation in spacecraft, automobiles or other specialized equipment,' says Xiangfeng Duan lead researcher on the project. 'They could also be useful for thermal energy storage, catalysis or filtration.'


Via: https://newatlas.com/ceramic-aerogel-heat-resistance/58509/


News / Recommended news More
2020 - 03 - 06
The global electroceramics market was valued at $8,590.9 million in 2017 and is projected to reach $12,084.4 million by 2023, demonstrating a CAGR of 5.9% during the forecast period. This is due to high consumption of these ceramics in manufacturing of electronic and automotive components and devices, electrical systems, medical sensors and implants. As the global economy is witnessing a mass...
2020 - 02 - 27
The dense microstructure of barium titanate as seen under a microscope. Credit: Pennsylvania State UniversityBarium titanate is an important electroceramic material used in trillions of capacitors each year and found in most electronics. Penn State researchers have produced the material at record low temperatures, and the discovery could lead to more energy efficient manufacturing.A team of Penn S...
2020 - 02 - 20
President, Sri Lanka Ceramics and Glass Council, Anura WarnakulasooriyaThe ceramics industry uses a lot of energy in terms of LP gas, furnace oil, kerosene and electricity. High energy prices in Sri Lanka increases the cost of production and the industry constantly struggles to maintain competitive prices against competing countries, President, Sri Lanka Ceramics and Glass Council (SLCGC), Anura W...
Share:
Uniris Exhibition Shanghai Co., Ltd.
Shanghai Branch
Tel: 4000 778 909 
E-mail:irisexpo@163.com

Guangzhou Branch
Tel: 020-8327 6389
E-mail:iacechina@unifair.com

IACE CHINA Official Website
犀牛云提供企业云服务
犀牛云提供云计算服务
Scan