New! Sign up for our free email newsletter.
Science News
from research organizations

New antenna tech to equip ceramic coatings with heat radiation control

Date:
November 21, 2019
Source:
Purdue University
Summary:
Researchers have developed a way for ceramic coatings to control heat radiation, a feature that could increase the performance of aircraft engines operating at high temperatures.
Share:
FULL STORY

The gas turbines powering aircraft engines rely on ceramic coatings that ensure structural stability at high temperatures. But these coatings don't control heat radiation, limiting the performance of the engine.

Researchers at Purdue University have engineered ceramic "nanotubes" that behave as thermal antennas, offering control over the spectrum and direction of high-temperature heat radiation.

The work is published in Nano Letters, a journal by the American Chemical Society. An illustration of the ceramic nanotubes will be featured as the journal's supplementary cover in a forthcoming issue.

"By controlling radiation at these high temperatures, we can increase the lifetime of the coating. The performance of the engine would also increase because it could be kept hotter with more isolation for longer periods of time," said Zubin Jacob, an associate professor of electrical and computer engineering at Purdue.

The work is part of a larger search in the field for a wide range of materials that can withstand higher temperatures. In 2016, Jacob's team developed a thermal "metamaterial" -- made of tungsten and hafnium oxide -- that controls heat radiation with the intention of improving how waste heat is harvested from power plants and factories.

A new class of ceramics would expand on ways to more efficiently use heat radiation.

Jacob's team, in collaboration with Purdue professors Luna Lu and Tongcang Li, built nanotubes out of an emerging ceramic material called boron nitride, known for its high thermal stability.

These boron nitride nanotubes control radiation through oscillations of light and matter, called polaritons, inside the ceramic material. High temperatures excite the polaritons, which the nanotubes -- as antennas -- then couple efficiently to outgoing heat radiation.

The antennas could bring the ability to accelerate the radiation, perform enhanced cooling of a system or send information in very specific directions or wavelengths, Jacob said.

The researchers plan to engineer more ceramic materials with polaritonic features for a host of different applications.

"Polaritonic ceramics can be game changing and we want them to be used widely," Jacob said.

This research was performed in the Purdue Discovery Park Birck Nanotechnology Center and is supported through Nascent Light-Matter Interactions, a program by the Defense Advanced Research Projects Agency. The program is led by Purdue University's School of Electrical and Computer Engineering.


Story Source:

Materials provided by Purdue University. Note: Content may be edited for style and length.


Journal Reference:

  1. Ryan Starko-Bowes, Xueji Wang, Zhujing Xu, Sandipan Pramanik, Na Lu, Tongcang Li, Zubin Jacob. High-Temperature Polaritons in Ceramic Nanotube Antennas. Nano Letters, 2019; DOI: 10.1021/acs.nanolett.9b03059

Cite This Page:

Purdue University. "New antenna tech to equip ceramic coatings with heat radiation control." ScienceDaily. ScienceDaily, 21 November 2019. <www.sciencedaily.com/releases/2019/11/191121183927.htm>.
Purdue University. (2019, November 21). New antenna tech to equip ceramic coatings with heat radiation control. ScienceDaily. Retrieved July 22, 2024 from www.sciencedaily.com/releases/2019/11/191121183927.htm
Purdue University. "New antenna tech to equip ceramic coatings with heat radiation control." ScienceDaily. www.sciencedaily.com/releases/2019/11/191121183927.htm (accessed July 22, 2024).

Explore More

from ScienceDaily

RELATED STORIES