CAJ | 학술논문

以机械合金法合成PPP/ZnO (聚对苯撑/ZnO)纳米复合材料。PPP/ZnO经球磨后混合充分,聚对苯撑将ZnO块体完全分割。热电性能研究表明：添加聚对苯撑后,复合材料塞贝克系数大大降低,当聚对苯撑添加量的质量分数大于2%时,纳米复合材料的塞贝克系数均低于100μV · K?1,远低于传统合金类热电材料的相应值；而复合材料的电导率却随聚对苯撑添加量增加而增大,当聚对苯撑添加量的质量分数增加到4%时,750 K下的电导率上升至2500 S · m?1,较单一材料的电导率提高5倍以上。复合材料的热导率较纯ZnO(10 W · m ?1· K?1)大大降低,并随聚对苯撑添加量的增加而降低,当其添加量的质量分数为4%时,其复合材料在800 K时的热导率可降至1.6W·m?1·K?1。
이궤계합금법합성PPP/ZnO (취대분탱/ZnO)납미복합재료。PPP/ZnO경구마후혼합충분,취대분탱장ZnO괴체완전분할。열전성능연구표명：첨가취대분탱후,복합재료새패극계수대대강저,당취대분탱첨가량적질량분수대우2%시,납미복합재료적새패극계수균저우100μV · K?1,원저우전통합금류열전재료적상응치；이복합재료적전도솔각수취대분탱첨가량증가이증대,당취대분탱첨가량적질량분수증가도4%시,750 K하적전도솔상승지2500 S · m?1,교단일재료적전도솔제고5배이상。복합재료적열도솔교순ZnO(10 W · m ?1· K?1)대대강저,병수취대분탱첨가량적증가이강저,당기첨가량적질량분수위4%시,기복합재료재800 K시적열도솔가강지1.6W·m?1·K?1。
Polyparaphenylene/ZnO (PPP/ZnO) nanocomposites were synthesized by mechanical alloying, and the powder of PPP and ZnO was mixed uniformly by ball-milling. The thermoelectric properties measurement showed that the Seebeck coe?cient decreases significantly with the increase of PPP content, and the Seebeck coe?cient of nanocomposites was lower than 100 μV · K?1 when the mass fraction of PPP was more than 2 %. This value is much lower than traditional thermoelectric materials. While the electrical conductivity increases with the increase of the PPP content, and the electrical conductivity up to 2 500 S · m?1 which was more than 5-fold than pure ZnO when the mass fraction of PPP was 4%. The thermal conductivity of nanocomposite samples is smaller than those of pure ZnO (10 W · m?1 · K?1) and decreases drastically with increasing PPP content. The thermal conductivity can reduced to 1.6 W · m?1 · K?1 at 800 K when the mass fraction of PPP is 4%.