Bi Cu 1-x SeO-based oxide thermoelectric ceramic material and preparation method thereof
A ceramic material and oxide technology, applied in the field of BiCu1-xSeO-based oxide thermoelectric ceramic materials and their preparation, can solve the problems of complex sintering process, cumbersome process cost, etc., and achieve low sintering temperature, short reaction time, and improved sample performance. Effect
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[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 , The mixed material is obtained after mixing; the mixed material is placed in a ball mill tank for dry milling at a speed of 400 rpm for 8 hours to obtain a precursor powder; the precursor powder is dried at 60° C. for 12 hours; then the powder is put into Spark plasma sintering is carried out in the graphite abrasives, the heating rate is controlled to 300℃ / min, the final temperature is 300℃ for 6min, and the pressure is 50Mpa; then the heating rate is controlled to 300℃ / min, and the final temperature is 700℃ for 8min. , The pressure is 50Mpa, the BiCuSeO-based oxide thermoelectric ceramic material is obtained.
[0029] The XRD spectrum of the sample prepared in this example is as figure 1 As shown, the figure shows that its composition is correct; the SEM spectrum of the sample is as follows figure 2 As sho...
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[0031] Example 2. Preparation of BiCu 0.985 SeO-based oxide thermoelectric ceramic material
[0032] Follow BiCu 0.985 The stoichiometric ratio in SeO, weighing Bi, Cu, Se and Bi 2 O 3 , The mixed material is obtained after mixing; the mixed material is placed in a ball milling tank for dry milling at a speed of 250 rpm for 2 hours to obtain a precursor powder; the precursor powder is dried at 50°C for 24 hours; then the powder is put into Spark plasma sintering is carried out in graphite abrasives, the heating rate is controlled to 50℃ / min, the final temperature is 200℃ for 4min, and the pressure is 30Mpa; then the heating rate is controlled to 50℃ / min, and the final temperature is 600℃ for 4min. , The pressure is 30Mpa, and BiCu is obtained 0.985 SeO-based oxide thermoelectric ceramic material.
[0033] The XRD spectrum of the sample prepared in this example is as figure 1 As shown, the figure shows that its composition is correct; the SEM spectrum of the sample is as follows fi...
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[0035] Example 3. Preparation of BiCu 0.975 SeO-based oxide thermoelectric ceramic material
[0036] Follow BiCu 0.975 The stoichiometric ratio in SeO, weighing Bi, Cu, Se and Bi 2 O 3 , The mixed material is obtained after mixing; the mixed material is placed in a ball milling tank for dry milling at a rotation speed of 300 rpm for 10 hours to obtain a precursor powder; the precursor powder is dried at 70° C. for 4 hours; then the powder is put into Spark plasma sintering is carried out in the graphite abrasive tool, the heating rate is controlled to 150℃ / min, the final temperature is 250℃ for 10 min, and the pressure is 40Mpa; then the heating rate is controlled to 150℃ / min, and the final temperature is 650℃ for 10 min. , The pressure is 40Mpa, and BiCu is obtained 0.975 SeO-based oxide thermoelectric ceramic material.
[0037] The XRD spectrum of the sample prepared in this example is as figure 1 As shown, the figure shows that its composition is correct; the SEM spectrum of the...
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