fig7

Figure 7. (A) Diagram of the effect of lattice softening on the coefficient of thermal expansion; (B) The XRD patterns of SPS-treated Cu1.8S-x% AgCl bulk specimens with different x values; (C) The enlarged patterns between 45.5° to 46.5° and the relative mass density of the samples; (D) The thermal expansion rate of Cu1.8S and Cu1.8S-2% AgCl in 300 K to 773 K. Copyright 2021, Elsevier[104]. SPS: Spark plasma sintering; XRD: X-ray diffraction.