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主旨 Importance of Soft Processing(=Low-Energy Production) of Advanced Ceramic Materials for Sustainable Society
公告日期 2016-11-22
公告內容

Speaker: Masahiro Yoshimura, NCKU MSE

 

 

Distinguished Chair Professor & Director,Promotion Center for Global Materials Research, Dept of Mater.,Sci. and Eng., National Cheng Kung University, Tainan,Taiwan: http://pcgmr.mse.ncku.edu.tw/    :yoshimur@mail.ncku.edu.tw

Prof. Emeritus. Tokyo Institute of Technology, Japan :yoshimura@msl.titech.ac.jp

 

 

Title: Importance of Soft Processing(=Low-Energy Production) of Advanced Ceramic Materials for Sustainable Society

 

Abstract: 

As well as organic and/or bio- materials, advanced inorganic materials, most of metallurgical materials, semiconductors and ceramic materials have been used in wide area of applications like structural, mechanical, chemical, electrical, electronic, optical, photonic, biological, medical, etc. They have scarecely been produced in natural processes nor biological systems. Thus they have generally been fabricated artificially and/or industrially by so-called high-technology, where  high temperature, high pressure, vacuum, molecule, atom, ion, plasma, etc. have been used for their fabrications, particularly for nanostructured advanced inorganic(ceramics) materials. 

Considering the lowering of  total energy consumption, we have challenged to fabricate those advanced inorganic materials with desired shape/size/location,etc. directly in low energetic routes using aqueous solutions since 1989 when we found a method to fabricate BaTiO3 film on Ti substrate in a Ba(OH)2 solution by Hydrothermal Electrochemical[HEC] method at low temperatures of 60-200 C.  We  proposed in 1995 an innovative concept and technology, “Soft Processing” or “Soft Solution Processing,” which aims low energetic (=environmentally friendly) fabrication of shaped, sized, located, and oriented inorganic materials in/from solutions.  It can be regarded as one of bio-inspired processing, green processing, or eco-processing.  When we have activated/stimulated interfacial reactions locally and/or moved the reaction point dynamically, we can get patterned ceramic films directly in solution without any firing, masking nor etching.   Direct Patterning of CdS, PbS and CaWO4 on papers by Ink-Jet Reaction method and LiCoO2 by electrochemically activated interfacial reactions. Furthermore, we have succeeded to fabricate BaTiO3 patterns on Ti by a laser beam scanning and carbon patterns on Si by plasma using a needle electrode scanning directly  in solutions. Recent success in TiO2 and CeO2 patterns by Ink-Jet Deposition, where nano-particles are nucleated and grown successively on the surface of substrate thus become dense even below 300 C will be presented. Nano-structured films will be also talked.A recent novel subject, Soft Processing for various nano-carbons including Graphene and functionalized Graphene, will be introduced. Where we have succeeded to prepare functionalized Graphene Ink via successive processes under ambient temperature pressure conditions.3-6

1)  MRS Bulletin,25[9],Sept. issue 2000, special issue for Soft Processing of Advanced Inorganic Materials ,Guest Editor:M. Yoshimura and J. Livage.

2)  Yoshimura, M., J. Mater. Sci.,41 [5],1299-1306 (2006), 43[7]2085-2103(2008).

3) J. Senthilnathan, M.Yoshimura et al., J. Mater Chem A,(2014) 2, 3332-3337

4) Sanjeeva Rao, K and  Yoshimura, M  et al. Adv. Funct. Mater.,25,298-305

5).SenthilNathan J. et al. , J. Mater. Chem A, 3, 3035 (2015)

6) Elumalai Satheeshkumar,Taron Makaron,Yury Gogotsi,M. Yoshimura, Sci, Repts,

Aug. 30,(2016)

 

 

 

Venue: 成功大學 成功校區 材料系館 敏雄講堂

 

Time: 105年11月24日 (四) 下午 15:10

最後修改時間 2016-11-22 15:50:44