Goodbye, Air Conditioning? New Ceramic Cools Environments Passively and Economically Without Using Energy

Written by Valdemar Medeiros

Published on 09/11/2024 at 11:41

Updated on 09/11/2024 at 11:42

Foto: City University of Hong Kong

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Scientists Develop Material That Will Make Air Conditioning An Obsolete Product. It Is A New Ceramic That Cools Areas Passively.

Scientists from Hong Kong have achieved a remarkable milestone by developing a new ceramic capable of cooling areas, representing a significant advancement in the field of passive radiative cooling, also known as passive refrigeration. This approach directs heat to cold space without the need for energy consumption. The innovative material, dubbed “cooling ceramic”, promises to revolutionize the traditional concept of air conditioning.

New Ceramic That Cools Areas Can Be Up To 20% More Efficient

The material achieved high-performance optical properties by reflecting heat at frequencies for which the Earth’s atmosphere is transparent. This enables lowering the temperature of areas without using air conditioning or other energy-consuming methods, making the material a promising alternative to traditional methods.

More than just a laboratory demonstration, the cost-effectiveness, durability, and versatility of the ceramic make it practically ready for sale, for use not only in construction but also in various other applications.

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Ceramic That Cools Areas And Eliminates Air Conditioning Is Produced With Affordable Materials

The ceramic that cools areas and eliminates air conditioning was produced using affordable materials, such as alumina, through a simple two-step process involving phase inversion and sintering, making production scalable and economically viable.

The ceramic scores on the two optical properties that determine the cooling performance of passive refrigeration materials, typically described over two wavelength ranges: The Solar Range and the Mid-Infrared Range. Efficient passive cooling requires high reflectivity in the first range to reduce solar heat gain, and high emissivity in the second range to maximize radiative heat dissipation.

Alumina, the primary raw material of the new ceramic, ensures that it maintains minimal solar absorption. The cooling ceramic is made of alumina, which generates the desired degradation of resistance to UV rays, which is a typical concern of many passive radiative cooling designs based on polymers.

The model also shows excellent fire resistance, withstanding temperatures above 1,000º C, exceeding the capabilities of most passive radiative cooling materials based on polymers or metals.

Material Achieves Excellent Performance in Tests

In addition to its excellent optical performance, during field tests, the cooling ceramic that will make air conditioning obsolete showed great weather resistance, chemical stability, and mechanical strength, making it ready for long-term outdoor applications.

At extremely high temperatures, the cooling ceramic exhibits superhydrophobicity, allowing immediate spreading of droplets due to its interconnected porous structure. This characteristic inhibits the Leidenfrost effect, which prevents evaporation, commonly found in traditional building coating materials, and allows for efficient evaporative cooling. The Leidenfrost effect is a phenomenon that occurs when a liquid comes into contact with a surface significantly hotter than its boiling point.

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Goodbye, Air Conditioning? New Ceramic Cools Environments Passively and Economically Without Using Energy

Scientists Develop Material That Will Make Air Conditioning An Obsolete Product. It Is A New Ceramic That Cools Areas Passively.

New Ceramic That Cools Areas Can Be Up To 20% More Efficient

Ceramic That Cools Areas And Eliminates Air Conditioning Is Produced With Affordable Materials

Material Achieves Excellent Performance in Tests

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Goodbye, Air Conditioning? New Ceramic Cools Environments Passively and Economically Without Using Energy

Scientists Develop Material That Will Make Air Conditioning An Obsolete Product. It Is A New Ceramic That Cools Areas Passively.

New Ceramic That Cools Areas Can Be Up To 20% More Efficient

Ceramic That Cools Areas And Eliminates Air Conditioning Is Produced With Affordable Materials

Material Achieves Excellent Performance in Tests

While in Brazil a 10-story building takes 2 years to complete, in China a company stacks pre-fabricated modules and raises the entire building in just 28 hours and 45 minutes.

Egypt wants to draw 10 million cubic meters of water from the Nile per day into the desert, irrigate a new agricultural frontier, and build a city where there is currently only sand.

BRICS is preparing a payment system inspired by the Brazilian PIX that will allow direct transactions between countries using national digital currencies without relying on the dollar or Western banks as intermediaries.

Ethiopia has banned gasoline and diesel cars, placed over a hundred silent electric buses on the streets of Addis Ababa, and now aims for half a million electric vehicles by 2030, all powered by Africa’s largest dam and a courage that few countries have shown.

A factory video in India goes viral showing workers wearing helmets with cameras to train an artificial intelligence that will eventually replace these same employees on the production lines.

In the South Atlantic, three isolated volcanic islands cause the wind to draw perfect spirals visible from space: a rare phenomenon called von Kármán vortex streets forms symmetrical patterns behind the peaks of the South Sandwich Islands and was recorded by the NOAA-20 satellite in 2025.

Created to cling to ships like a lamprey, the new U.S. underwater drone sleeps on the ocean floor, launches torpedoes, and recharges itself with the current.

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