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本文以溶胶-凝胶法制备了聚对苯撑纳米复合Zn_(0.9)Co_(0.1)O基(PPP@Zn_(0.9)Co_(0.1)O)热电材料。Zn_(0.9)Co_(0.1)O材料的特征衍射峰与标准卡片相对应,样品的单相性较好。在Zn_(0.9)Co_(0.1)O基体中,镶嵌着呈不规则圆形的聚对苯撑纳米颗粒,大小在50 nm以下。添加高电导率的聚对苯撑纳米颗粒后,PPP@Zn_(0.9)Co_(0.1)O材料体系的电导率大幅度增加。经过Co掺杂之后的Zn_(0.9)Co_(0.1)O材料样品在提高电导率同时,使得Seebeck系数降低;而添加PPP进行复合之后,随着PPP添加量的增加,Seebeck系数先增加后减小。最大的ZT值为9%(wt)PPP@Zn_(0.9)Co_(0.1)O材料在900 K时取得,达到0.084。
In this paper, poly (p-phenylene) nano composite Zn_ (0.9) Co_ (0.1) O (PPP @ Zn_ (0.9) Co_ (0.1) O) thermoelectric materials were prepared by sol-gel method. The characteristic diffraction peak of Zn_ (0.9) Co_ (0.1) O material corresponds to the standard card, and the single phase of the sample is better. In Zn_ (0.9) Co_ (0.1) O matrix, inlaid with irregular circular poly (phenylene oxide) nanoparticles, the size of 50 nm or less. The conductivity of the system of PPP @ Zn_ (0.9) Co_ (0.1) O greatly increased after the addition of high conductivity poly (para-phenylene) nanoparticles. After the Co-doped Zn_ (0.9) Co_ (0.1) O materials, the Seebeck coefficient decreased while the conductivity was increased. After the addition of PPP, the Seebeck coefficient increased first and then decreased with the addition of PPP . The maximum ZT value is 9% (wt) of PPP @ Zn_ (0.9) Co_ (0.1) O at 900 K, reaching 0.084.