Chinese researchers develop advanced ceramic material for solid-state cooling

A group of scientists from Xi’an Jiaotong University and partnering institutions has developed a new ceramic material that could improve the performance and efficiency of next-generation cooling systems. Their work, recently published in Nature Communications, focuses on a class of materials known as relaxor ferroelectric ceramics, which can generate heat or absorb it when exposed to an electric field — a phenomenon called the electrocaloric effect.

The research addresses a key challenge in the development of electrocaloric cooling: finding materials that offer both strong cooling performance and stable operation across a wide temperature range. Most existing materials show good results only in narrow temperature windows, limiting their practical use. The new ceramics developed by the team perform well over a broader range — from about 30 to 80 °C — and show consistent results, making them suitable for everyday applications such as electronics and household cooling systems.

The scientists achieved this by fine-tuning the composition of the material and carefully controlling the internal structure during production. This dual approach allowed them to improve the material’s cooling response and maintain stability under repeated use. In laboratory tests, the ceramics demonstrated a temperature change of up to 3.9 °C when exposed to an electric field — a significant result for this type of technology.

According to the researchers, this breakthrough could support the development of more compact, energy-efficient, and environmentally friendly cooling systems that do not rely on traditional refrigerants, which often contribute to greenhouse gas emissions. Their next goal is to adapt the technology for use in real-world devices through improved manufacturing techniques and system integration.

“This research opens up new possibilities for sustainable cooling solutions,” said the authors. “Our ceramics combine strong performance with temperature stability, making them promising materials for future solid-state cooling applications.”

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