Hailong Zhang

TL;DR: In this article, lead-free piezoelectric NaxK1−xNbO3 (x=20−80 mol%) ceramics were fabricated using spark plasma sintering at a low temperature (920°C).

TL;DR: In this article, the effects of orientation degree and hot-forging temperature on thermoelectric properties were investigated, and the results showed that the electrical resistivity was reduced by increasing orientation degree, the Seebeck coefficient was increased by raising hot forging temperature, and consequently the power factor was significantly increased.

TL;DR: In this paper, the role of Te substitution in enhancing thermoelectric properties is discussed in relation to the bipolar diffusion mechanism, and the forbidden energy gap is estimated to be 0.047 eV from the temperature corresponding to the occurrence of intrinsic excitation, which is in good agreement with Singh's theoretical calculation (0.05 eV) [D. J. Singh and W. E. Pickett, Phys. Rev.

TL;DR: In this article, a high thermal conductivity of 493 Wm−m−1 K−1 was achieved in the Cu/Ti-coated diamond composites, attributed to the 285nm thick Ti coating.

TL;DR: In this article, a comparative study has been made on the accuracy and effectiveness of the three constitutive models to predict the high temperature flow stress for a 20CrMo alloy steel, and the results show that the predicted values by the Johnson-Cook model could not agree well with the experimental values except for under reference deformation conditions.