Exceptionally low lattice thermal conductivity in polycrystalline ceramic penta-columnar W18O49: elucidating morphology, underlying mechanism, and the impact of derivative W17TrO49 (Tr = V, Ti, Ta)

Quy Ngoc Nguyen Le, Nhat Quang Minh Tran, Nguyen Chi Cuong, Tien Thuy Nguyen Tran, Anh Tuan Thanh Pham