Bi Cu 1-x SeO-based oxide thermoelectric ceramic material and preparation method thereof

[0027] Example 1. Preparation of BiCuSeO-based oxide thermoelectric ceramic material

[0028] According to the stoichiometric ratio in BiCuSeO, weigh Bi, Cu, Se and Bi 2 o 3 , after mixing, the mixed material is obtained; the mixed material is placed in a ball mill tank for dry grinding, the rotation speed is 400rpm, and the time is 8h to obtain the precursor powder; the precursor powder is dried at 60°C for 12h; then the powder is put into Spark plasma sintering is carried out in a graphite abrasive tool, the heating rate is controlled to be 300°C / min, the final temperature is 300°C for 6 minutes, and the pressure is 50Mpa; then the heating rate is controlled to be 300°C / min, and the final temperature is 700°C for 8 minutes by discharge plasma sintering , the pressure is 50Mpa, and the BiCuSeO-based oxide thermoelectric ceramic material is obtained.

[0029] The XRD spectrum pattern of the sample prepared by this embodiment is as figure 1 As shown, it can be seen from the

[0031] Embodiment 2, preparation BiCu 0.985 SeO-based oxide thermoelectric ceramic materials

[0032] According to BiCu 0.985 Stoichiometric ratio in SeO, weighing Bi, Cu, Se and Bi 2 o 3 , after mixing, the mixed material is obtained; the mixed material is placed in a ball mill tank for dry grinding, the rotation speed is 250rpm, and the time is 2h, to obtain the precursor powder; the precursor powder is dried at 50°C for 24h; then the powder is put into Spark plasma sintering was carried out in a graphite abrasive tool, the heating rate was controlled to be 50°C / min, the final temperature was 200°C for 4 minutes, and the pressure was 30Mpa; then the heating rate was controlled to be 50°C / min, and the final temperature was 600°C for 4 minutes by discharge plasma sintering , the pressure is 30Mpa, to get BiCu 0.985 SeO-based oxide thermoelectric ceramic materials.

[0033] The XRD spectrum pattern of the sample prepared by this embodiment is as figure 1 As shown, it can

[0035]Embodiment 3, preparation BiCu 0.975 SeO-based oxide thermoelectric ceramic materials

[0036] According to BiCu 0.975 Stoichiometric ratio in SeO, weighing Bi, Cu, Se and Bi 2 o 3 , after mixing, the mixed material is obtained; the mixed material is placed in a ball mill tank for dry grinding, the rotation speed is 300rpm, and the time is 10h to obtain the precursor powder; the precursor powder is dried at 70°C for 4h; then the powder is put into Spark plasma sintering is carried out in graphite abrasive tools, control the heating rate to 150°C / min, sinter at a final temperature of 250°C for 10 minutes, and a pressure of 40Mpa; then control the heating rate to 150°C / min, and discharge plasma sintering at a final temperature of 650°C for 10 minutes , the pressure is 40Mpa, to get BiCu 0.975 SeO-based oxide thermoelectric ceramic materials.

[0037] The XRD spectrum pattern of the sample prepared by this embodiment is as figure 1 As shown, it can be seen from the f