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Frequency-dependent Energy Absorbing Performance of 3D Printable Metamaterials
M. K. Kim(김민겸),T. H. Kim(김태환),G. R. Kang(강규리),J. W. Lim(임진우),Y. G. Lee(이영은),Y. J. Choi(최유진),M. S. Kang(강민석),J. W. Park(박장우),E. Y. Oh(오은영),B. Y. Yoon(윤범용),J. H. Suhr(서종환) Korean Society for Precision Engineering 2020 한국정밀공학회 학술발표대회 논문집 Vol.2020 No.9월
나노구조를 기반으로 하는 Bi<sub>2</sub>Te<sub>3</sub> 소결과 그 시간에 따른 열전 특성
유수산나,강민석,김도경,문경숙,구상모,Yu, Susanna,Kang, Min-Seok,Kim, Do-Kyung,Moon, Kyung-Sook,Toprak, M.S.,Koo, Sang-Mo 한국전기전자재료학회 2014 전기전자재료학회논문지 Vol.27 No.9
Thermoelectric materials have been the topic of intensive research due to their unique dual capability of directly converting heat into electricity or electrical power into cooling or heating. Bismuth telluride ($Bi_2Te_3$) is the best-known commercially used thermoelectric material in the bulk form for cooling and power generation applications In this work we focus on the large scale synthesis of nanostructured undoped bulk nanostructured $Bi_2Te_3$ materials by employing a novel bottom-up solution-based chemical approach. Spark plasma sintering has been employed for compaction and sintering of $Bi_2Te_3$ nanopowders, resulting in relative density of $g{\cdot}cm^{-3}$ while preserving the nanostructure. The average grain size of the final compacts was obtained as 200 nm after sintering. An improved NS bulk undoped $Bi_2Te_3$ is achieved with sintered at $400^{\circ}C$ for 4 min holding time.