세미나안내

[2017 03 09] 특별세미나 Ph.D Rishi Raj

Flash Sintering: A New Paradigm in Physics of Ceramic Materials

POSTECH Graduate Students and Researchers

관리자 | 2017.03.07 15:32 | 조회 2046


Reception: POSTECH Graduate Students and Researchers

Reference: POSTECH Professors

Subject: MSE Special Seminar_Prof. Rishi Raj

 

Date: 2017. 03. 09(Thu) 17:00 ~ 18:15

Place: Science Building, Room.202 Multimedia Room

Title: Flash Sintering: A New Paradigm in Physics of Ceramic Materials

Speaker: Prof. Rishi Raj (University of Colorado Boulder)

Host of a Seminar: Prof. Junwoo Son

Abstract:

The phenomenon of flash sintering was discovered in 2010. It was shown that massive diffusion leads to sintering of ceramics at temperatures well below 1000 oC in less than five seconds, under the influence of modest electrical fields. That early discovery is now evolving into the possibility of creating new states of matter. For example, a transition to semiconductor like behavior in ceramics which, intrinsically, have very wide band gaps. There is bright electroluminescence the intensity of which is higher in one ceramic (e.g. HfO2) than in another (TiO2). Metastable phases have been shown to form. Most recent experiments show unususal electron and ionic transport properties being introduced into ceramics which are normally insulators. Conceptually these effects are attributed to the generation of colossal concentrations of defects. Experiments at the Synchrotrons (including PLS-II, APS, and NSLS-II)) and at Oak Ridge National Laboratory (Neutron Scattering) are underway for in-situ experiments to explore the generation of such defect avalanches.

 

Department of Materials Science and Engineering





216개(2/11페이지)
세미나안내
번호 제목 글쓴이 조회 날짜
196 [2018 04 18] 정기세미나 7th 첨부파일 관리자 271 2018.04.16 10:44
195 [2018 04 09] 특별세미나 _Ph.D Seung Kwon Seol 첨부파일 관리자 325 2018.04.05 09:34
194 [2018 04 04] 정기세미나 6th 첨부파일 관리자 309 2018.04.02 09:02
193 [2018 03 28] 정기세미나 5th 첨부파일 관리자 366 2018.03.26 09:33
192 [2018 03 21] 정기세미나 4th 첨부파일 관리자 290 2018.03.19 09:34
191 [2018 03 20] 특별세미나 _Dr. Joon Sue Lee (UC 첨부파일 관리자 351 2018.03.16 10:52
190 [2018 03 14] 정기세미나 3rd 첨부파일 관리자 312 2018.03.12 09:14
189 [2018 03 07] 정기세미나 2nd 첨부파일 관리자 328 2018.03.06 15:43
188 [2018 02 28] 정기세미나 1st 첨부파일 관리자 386 2018.02.26 09:20
187 [2018 02 21] 신소재공학과 특별세미나 첨부파일 관리자 389 2018.02.19 11:15
186 [2018 02 02] 특별세미나 _Ph.D. Jang-Ung Park 첨부파일 관리자 528 2018.01.29 09:10
185 [2018 01 24] 특별세미나 _DR. Sang Soo Han (KI 첨부파일 관리자 532 2018.01.22 15:05
184 [2018 01 09] 특별세미나 _Ph.D. Jangyup Son (U 첨부파일 관리자 674 2018.01.09 09:25
183 [2017 12 28] 특별세미나 _Ph.D. Ju Hun Lee (UC 첨부파일 관리자 505 2017.12.26 10:44
182 [2017 12 06] 정기세미나 11th 첨부파일 관리자 526 2017.12.04 09:16
181 [2017 11 29] 정기세미나 10th 첨부파일 관리자 675 2017.11.20 09:05
180 [2017 11 21] 특별세미나 _Prof. Sung Hoon Kang 첨부파일 관리자 707 2017.11.20 09:06
179 [2017 11 22] 정기세미나 9th 첨부파일 관리자 498 2017.11.20 09:05
178 [2017 11 15] 정기세미나 8th 첨부파일 관리자 443 2017.11.07 08:51
177 [2017 11 08] 정기세미나 7th 첨부파일 관리자 427 2017.11.07 08:51