Sub-minute synthesis and modulation of β/λ-MxTi3-xO5 ceramics towards accessible heat storage

Pengfei Zhao, Guangshi Li (), Xiaolu Xiong (), Peng Cheng, Zhongya Pang, Chenteng Sun, Hu Cheng, Caijuan Shi, Xing Yu, Qian Xu, Xingli Zou () and Xionggang Lu ()
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Pengfei Zhao: Shanghai University
Guangshi Li: Shanghai University
Xiaolu Xiong: Shanghai University
Peng Cheng: Shanghai University
Zhongya Pang: Shanghai University
Chenteng Sun: Shanghai University
Hu Cheng: Chinese Academy of Sciences
Caijuan Shi: Chinese Academy of Sciences
Xing Yu: Shanghai University
Qian Xu: Shanghai University
Xingli Zou: Shanghai University
Xionggang Lu: Shanghai University

Nature Communications, 2025, vol. 16, issue 1, 1-9

Abstract: Abstract Nearly 50% of global primary energy consumption is lost as low-temperature heat. λ-Ti3O5 holds promise for waste heat harvesting and reuse; however, achieving reversible phase transitions between its λ and β phases under accessible conditions remains a major challenge. Here, we proposed a simple laser method that incorporates element substitution for sub-minute synthesis (20–60 s) of λ-MxTi3-xO5 (M = Mg, Al, Sc, V, Cr, Mn, or Fe, 0.09 ≤ x ≤ 0.42). In particular, aluminum-substituted λ-AlxTi3-xO5 demonstrated the lowest energy barrier, with a transition pressure of 557 MPa and temperature of 363 K. Notably, compression of the (001) crystal plane could reduce the transition pressure to only 35–40 MPa, enabling the applicability of λ-AlxTi3-xO5 for wide applications in heat recovery and future lunar explorations.

Date: 2025
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DOI: 10.1038/s41467-025-57604-0

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