Abstract
通过溶胶-凝胶法制备单相Bi 2 Sr 2 Co 2 O y 化合物, 通过添加PEG20000和超声分散对化合物粉体微结构进行调控, 采用SPS烧结得到了致密的块体. 探索了微结构对Bi 2 Sr 2 Co 2 O y 化合物电性能的影响规律. 结果表明,添加PEG20000和超声分散可以明显降低Bi 2 Sr 2 Co 2 O y 化合物粉体的晶粒尺寸, 使烧结块体的晶粒尺寸大幅度减小, 从而显著提高材料的电性能. 温度为873K时, 添加PEG20000并超声处理所制备样品烧结块体获得了最高 ZT 值0.041.
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