CAJ | 학술논문

【目的】探索 PbTe 热电材料的合金化方法。【方法】利用机械合金化方法和高频熔炼方法快速制备 PbTe热电材料。首先，通过调整 Pb 和 Te 成分配比，球磨时间，制备出品质较好的 PbTe 热电材料；其次，利用高频熔炼的方法制备 PbTe 材料；最后对所制备的样品进行 X 射线衍射（XRD）和扫描电镜（SEM）测试和分析，比较两种方法制备样品的优缺点。【结果】机械合金化制备的 PbTe 样品退火时，细化的晶粒开始回复和再结晶，结晶度明显增加，但是仍然低于高频熔炼的样品，且退火后，块状 PbTe 材料中存在大量的缺陷和晶格的畸变。【结论】通过机械合金化制备的 PbTe 样品结晶度明显低于高频炉制备的样品。
【목적】탐색 PbTe 열전재료적합금화방법。【방법】이용궤계합금화방법화고빈용련방법쾌속제비 PbTe열전재료。수선，통과조정 Pb 화 Te 성분배비，구마시간，제비출품질교호적 PbTe 열전재료；기차，이용고빈용련적방법제비 PbTe 재료；최후대소제비적양품진행 X 사선연사（XRD）화소묘전경（SEM）측시화분석，비교량충방법제비양품적우결점。【결과】궤계합금화제비적 PbTe 양품퇴화시，세화적정립개시회복화재결정，결정도명현증가，단시잉연저우고빈용련적양품，차퇴화후，괴상 PbTe 재료중존재대량적결함화정격적기변。【결론】통과궤계합금화제비적 PbTe 양품결정도명현저우고빈로제비적양품。
[Objective]Alloying methods were explored for PbTe thermoelectric materials.[Methods]High energy mechanical ball milling method and high frequency melting method were used to prepare PbTe thermoelectric materials.Firstly,the fractions of the samples and the milling time were adjusted to obtain the high quality samples.Secondly,the high frequency melting method was used to prepare the PbTe samples.Finally,the X-ray diffraction (XRD) and scanning electron microscope (SEM)were employed to obtain the crystal information and micro-morphology.[Results]The crystallinity of the PbTe prepared by mechanical alloying was obviously lower than that of high frequency melting.After annealing,the crystallinity of me-chanical alloying was also lower than that of high frequency melting,but the crystallinity of mechanical alloying was increased during the annealing.The annealed bulk PbTe had lots of de-fects and lattice distortion.[Conclusion]The crystallinity of the PbTe prepared by mechanical alloying was obviously lower than that of high frequency melting.